Three taxa, Bulbophyllum cariniflorum var. orlovii (sect. Pleiophyllum), B. sonii (sect. Anisopetalon) and B. ustulata (sect. Brachystachya) are described as new for science. All of these novelties are local endemics of Vietnam. Additionally, four species, B. flavescens (sect. Aphanobulbon), B. ovatum (sect. Desmosanthes), B. physocoryphum (sect. Macrocaulia) and B. wendlandianum (sect. Cirrhopetalum) are recorded for the flora of Vietnam for the first time. These species are endemic of the Indochinese Peninsula in a broad sense, except for B. flavescens having wide distribution in western Malesia. Data on ecology, phenology, distribution, brief relevant taxonomic notes, as well as colour photographs and line drawings of the type and voucher specimens are provided for all reported taxa. Lectotypification is provided for B. wendlandianum.
Leonid V. Averyanov, Nong Van Duy, Nguyen Hoang Tuan, Maxim S. Nuraliev, Tatiana V. Maisak and Nguyen Cong Anh. 2018. New Species of Bulbophyllum (Orchidaceae) in the Flora of Vietnam. Phytotaxa. 369(1); 1–14. DOI: 10.11646/phytotaxa.369.1.1
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
The new species, Chiloschista pulchella(Orchidaceae: Aeridinae) was discovered in Hin Nam No Nature Protected Area, Khammoune Province of the central Laos. The paper provides detailed description and illustration of this species, which is identified as a local endemic of karstic rocky limestone of the northern part of the protected area. It differs from all known congeners in the thin lip, median lip lobe dissected into two small subulate lobules, as well as in large purple blotches on the lip side-lobes never found in other species of this genus. The newly discovered plant represents interest for cultivation as an ornamental plant and needs protection in its natural habitats.
Keyword: Laos, Orchids, Plant diversity, Plant taxonomy, Limestone endemism, Hin Nam No Nature Protected Area
Fig. 1. Chiloschista pulchellaAver. & K.S. Nguyen. Flowering plant, inflorescence, flowers and floral details (fresh living plant prior to preparation of the holotype herbarium specimen, AL 889).
Photos by Khang Sinh Nguyen and Leonid V. Averyanov,
correction and design by L. Averyanov.
Fig. 2. Chiloschista pulchella Aver. & K.S. Nguyen. A. Flowering plant. B. Intact flowers, side views. C. Intact flowers, frontal view. D. Flattened flowers, view from behind and frontal view. E. Intact lip, view from above. F. Intact lip, view from below. G. Intact lip, side view. H. Sagittal section of the lip. I. Anther cap, side view, frontal view and view from below. J. Pollinarium, frontal view, view from behind and side view. K. Halves of pollinium.
All drawn from the type, AL 889 by L. Averyanov and T. Maisak.
Described from central Laos (“Laos, Khammoune Province, Boualapha District, ..., within the territory of Hin Nam No Nature Protected Area, primary dry evergreen and semi deciduous broad-leaved forest on very steep rocky slope near karstic hill top composed with solid, marble-like highly eroded limestone at 350–430 m a.s.l., epiphyte on tall tree, rare)
Type (“9 May 2018, L. Averyanov, K. S. Nguyen, T. Maisak, L. Xaiyavongsa, S. Keovankham, AL 889” – LE (holotype).
Distribution: Central Laos: Khammoune province (Boualapha district, the territory of Hin Nam No Nature Protected Area). Endemic. Habitat, ecology and conservation status: Miniature aphyllous epiphytes growing in primary dry evergreen and semideciduous, broad-leaved forests on karstic rocky limestone, at an elevation of 350–430 m. Rare. Currently, the IUCN Red List status should be ascertained as Data Deficient (DD).
Etymology: The specific epithet refers to the attractive, colorful flowers having purple lip side lobes.
Notes. Chiloschista pulchella strikingly differs from all its congeners by the flat lip apex (not fleshy), the median lip lobe dissected into two small subulate lobules, and by the presence of large purple blotches on the sidelobes of the lip which is never found in any other species of the genus. This new species belongs to the group of species with a simple operculum (not having any appendages), but has no certain similarity with any other species of this group. Formally, it can be compared with C. exuperei (Guillaumin) Garay, which also has a bilobulate median lip lobe. However, both these species are obviously different in their floral morphology
Leonid V. Averyanov, Khang Sinh Nguyeh and Tatiana V. Maisak. 2018. Chiloschista pulchella (Orchidaceae: Aeridinae) New Orchid Species from Lao PDR. Taiwania. 63(4); 389-392. DOI: 10.6165/tai.2018.63.389
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
A new monotype genus Xylacanthus Aver. et K. S. Nguyen with one species, X. laotica Aver. et K. S. Nguyen (Acanthaceae, Acanthoideae, Ruellieae), is described and illustrated. Described genus has arborous living form rather unusual among in Acanthaceae. This small deciduous tree was observed as a main co-dominant of primary deciduous xerophytic karst scrub on extra dry tops of remnant limestone mountains in Pon Xay district of Luang Prabang province in central part of northern Laos. New genus has rather isolated taxonomic position for its floral morphology, xerophytic living form and obligatory deciduous xerophytic character. The distribution of this plant is limited by limestone karstic areas of central part of northern Laos in the limits of Luang Prabang province.
Fig. 2. Xylacanthus laotica. A – Flowering and fruiting stem with removed bud scales, young leaves, floral bracts and flowers. B – Bud scales. C – Young leaves. D. Floral bracts. E – Flower. F – Calyx with young fruit. G – Dissected and flattened perianth tube with removed style. H – Intact anther, side view. I – Anther with removed hairs, half side view. J – Sagittal section of calyx and gynoecium. K – Ovary and style. L – Calyx and capsule. M – Sagittal section of the calyx and ripe capsule. N – Individual calyx lobe, adaxial surface. O – Ripe open capsule, side view. P – Capsule valve with ripening seeds, half side view. Q – Ripening seed with falcate retinaculum. R – Ripe seed, frontal and side view, and view from the base. All drawn from the type – LA-VN 2050 by L. Averyanov and T. Maisak.
Fig. 1. Xylacanthus laotica. A – Natural habitat of species in Phou Hua Ben Toc Mountain (Luang Prabang province, Pon Xay district, between Houay Man and Nam Bo villages, LA-VN 2130). B – Monodominant deciduous scrub on mountain summit formed by S. arborescens (LA-VN 2130). C – Individual tree of the species on mountain top (LAVN 2130). D, E – Flowering branches of canopy (LA-VN 2130). F-I, K – Flowering and fruiting shoots (Type – LAVN 2050). J, L – Flower, frontal and side view (LA-VN 2157). M – Stamens (LA-VN 2157). N – Hairiness of anther connective and filament (LA-VN 2157).
Photos of L. Averyanov and Khang Sinh Nguyen.
XylacanthusAver. et K. S. Nguyen, gen. nov.
Type:X. laotica Aver. et K. S. Nguyen
Monotype genus.
Description: Deciduous monoecious tree to 5 m tall flowering and fruiting before leaf formation; shoots isophyllous; leaves in terminal rosette, opposite, decussate, pilose; flowers solitary, axillary, sessile; floral bracts 0–2, lanceolate, villose, persistent; calyx 5-lobed, villose, with many cystoliths; corolla dark blue, cylindric, hairy, 5-lobed, lobes rounded, recurved, forming almost actinomorphic limb; stamens 4, didynamous, monadelphous, all fertile, pairwise distally connivent, filaments glandular hairy, at base with many long hairs; anthers basifixed, 2-thecous, thecae with prominent recurved, sterile, acuminate base; connective with many long hairs; ovary erect, narrowly ovoid, setose, 2-locular; style filiform, comose; stigma 2-cleft; capsule ellipsoid, shortly hairy, 6–8-seeded; seeds lenticular, pilose with appressed mucilaginous hairs.
Etymology: Generic name refers to an arboreous plant habit.
Note: The discovered plant superficially somewhat resembles species of Strobilanthes Blume, large widespread genus well presented in tropical southeast Asia and in countries of Indochinese Peninsular as well (Benoist, 1935; Pham Hoang Ho, 2000; Deng et al., 2006, 2011; Newman et al., 2007). However, it strikingly differs from all known Strobilanthes species in its unusual arborous plant habit, spurred anthers, filaments and anther connective densely hairy with long white hairs, as well as in many (more than 4)-seeded capsule. Some of these characters, as well as similar pollen grain structure, remind representative of the genus Echinacanthus Nees. However, the only true Echinacanthus species (E. attenuatus Nees) is a lowland slender herb of the Nepal-Darjeeling area, which is totally different in habit from our plant being also geographically separated. It is highly probable that discovered plant represents new undescribed genus endemic for limestone areas of central Laos. Like its expected relatives, it may be placed into subtribe Strobilanthinae (Acanthaceae, subfam. Acanthoideae, tribe Ruellieae) in the family classification proposed by A. Takhtajan (2009). Newly described genus includes one species described below.
Xylacanthuslaotica Aver. et K. S. Nguyen, sp. nov.
Etymology The species epithet refers to the country of its origin.
Distribution Northern Laos, Luang Prabang province, Pon Xay district (Houay Man, Nam Bo and Bane Phou Souong villages). Endemic.
Note: This remarkable plant strikingly differs from almost all known representatives of Acanthaceae family in its arborous living form, xerophytic deciduous character, as well as flowering and fruiting before leaves formation. Oldest observed trees have age at least 2–3 decades and stands in obvious contrast with herbaceous and semi-woody commonly pliestesial Acanthaceae species commonly adopted to humid conditions of shady wet evergreen forests. Like many deciduous xerophytes of extra dry exposed karstic fields, described species has fairly short period of vegetation forming leaves only during rainy season from middle April till September. Tree remains completely leafless during dry rainless winter. Described monotype genus represents typical element of ancient strictly endemic xerophytic limestone flora historically adapted to extra dry summits of karstic limestone formations of northern Laos. This curious, highly specialized flora includes many convergent xerophytic derivates from different families. Unfortunately, it remains still weakly studied. Some other remarkable plants described recently from extra dry karstic limestone fields of northern Laos (Averyanov, Nguyen, 2012; Pimenov et al., 2016) are also similarly woody deciduous xerophytes, e. g. Begonia viscosa (Begoniaceae) and Xyloselinum laoticum (Apiaceae). Like X. laotica, these species also strikingly differ from its herbaceous mesophytic congeners.
L. V. Averyanov, K. S. Nguyen and T. V. Maisak. 2018. Xylacanthus laotica (Acanthaceae, Acanthoideae), A New Genus and Species from Laos. Turczaninowia. 21(2); 101–110 DOI: 10.14258/turczaninowia.21.2.11
Аннотация.Новый монотипный род Xylacanthus Aver. et K. S. Nguyen с единственным видом, X. laotica Aver. et K. S. Nguyen (Acanthaceae, Acanthoideae, Ruellieae), описан в качестве нового для науки. Описание сопровождается цветными фотографиями и черно-белыми рисунками. Описываемое растение имеет древесную жизненную форму, что крайне редко встречается в семействе Acanthaceae. Открытый вид представляет из себя маленькое листопадное деревцо, являющееся главным доминантом первичной ксерофильной листопадной кустарниковой растительности, покрывающей исключительно сухие карстовые обитания на вершинах известняковых столовых останцев района Пхонсай провинции Луангпхабанг в центральной части северного Лаоса. Новый род занимает изолированное таксономическое положение по морфологии цветка, ксерофитному древесному характеру жизненной формы и облигатной листопадности. Распространение этого растения ограничено карстовыми реликтовыми скальными известняками центральной части северного Лаоса в пределах провинции Луангпхабанг.
Ключевые слова: карстовые флоры, Лаос, новый род, таксономия растений, эндемизм растений, Acanthaceae, Xylacanthus.
Л. В. Аверьянов, К. С. Нгуен, Т. В. Майсак. 2018. Xylacanthus laotica (Acanthaceae, Acanthoideae) – новый род и вид из Лаоса. Turczaninowia. 21(2); 101–110 DOI: 10.14258/turczaninowia.21.2.11
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
Rohdea harderi N. Tanaka, D. P. Hannon & Aver., a new species from northern Vietnam, is described and illustrated. It is most closely allied to R. verruculosa from SW China, but differs mainly by the narrower annular appendage at the throat of the perianth tube, explanate, subacute, crenulate, externally smooth perianth segments, smaller stigma and obovoid ovary. Its affinity is briefly discussed on the basis of floral traits. A key to the species known from Vietnam is also provided.
Fig. 1. Rohdea harderi. A habit with flowering scape; B aerial basal portion of plant; C habit with scape after flowering; D & E flowers; F fruit; G seed; H inflorescence; J inflorescence in late anthesis; K inflorescence after flowering.
Photographs A – C, F – K by D. P. Hannon, D & E by S. C. Lahmeyer. Layout by N. Tanaka.
Fig. 2 Flower and bracts of Rohdea harderi. A flower, front view; B flower vertical section with intact pistil inside perianth tube, annulus arrowed; C partial perianth with stamen removed from near base, ventral view with annulus arrowed; D – G pistil, D side view; E trisect stigma on top, view from above; F ovary torn to show locular interior bearing 4 ovules on placentae; G ovary, cross-section, showing interior with ovules; H – K stamens: H dorsal view; J side view; K ventral view; L sterile bract from distal portion of peduncle, ventral view, expanded; M floral bract (right) and bracteole (left; arrowed) on part of rachis.
Scale bar at A for A, B, L, M; at D for D – K.
Drawn from a cultivated plant at Huntington Botanical Gardens (accession number 90679). Drawn by N. Tanaka.
Rohdea harderi N. Tanaka, D. P. Hannon & Aver. sp. nov.
Type: Vietnam, Son La province, D. K. Harder et al. 7276, dried herbarium specimen prepared by D. P. Hannon s.n. on 21 April 2017 from a plant cultivated at Huntington Botanical Garden (HBG 90679) (holotype, HNT 13048!).
Recognition: Most closely allied to Rohdea verruculosa (Q. H. Chen) N. Tanaka (Tanaka 2003: 332, excluding Tupistra annulata H. Li & J. L. Huang and its homotypic synonym), but differs from it chiefly by the narrower annulus (0.5 vs 1 – 1.5 mm wide) at the throat of the perianth tube, explanate, crenulate, subacute, smooth perianth segments (vs incurved, nearly entire, caudate(-filose), externally verruculose segments), smaller stigma (0.7 – 0.8 vs c. 1.3 mm across), and obovoid ovary (vs ovoid or globose ovary).
Distribution: Endemic to NW Vietnam: Dien Bien and Son La provinces.
Habitat:
In Dien Bien province, Rohdea harderi occurs on shady forest floor or among rocks in humid, highly degraded primary evergreen broadleaved forest on very steep slopes of mountains composed of solid limestone at elevations 1100 – 1300 m a.s.l. (Averyanov et al. as CPC 2115, LE).
In Son La province, it occurs as undergrowth on light to heavily shaded forest floor in secondary or primary forest with some timber species (mainly Burretiodendron Rehder and conifers) removed along ridgetop of crystalline limestone around 1468 m in elevation (Harder et al. 7276 as D. P. Hannon s.n., HNT 13048).
Etymology: The specific epithet honours Dr Daniel K. Harder as founder of the Missouri Botanical Garden’s Viet Nam Botanical Conservation Program, who discovered, collected and brought the new species into cultivation, thereby greatly contributing to the improvement of our knowledge on the plant.
Noriyuki Tanaka, Dylan P. Hannon, Daniel K. Harder, Leonid V. Averyanov and Sean C. Lahmeyer. 2018. Rohdea harderi (Asparagaceae), A New Species from northern Vietnam. Kew Bulletin. 73:31. DOI: 10.1007/s12225-018-9756-3
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
A second species of Silvorchis, until now considered to be a presumably extinct monotypic genus endemic to western Java has been discovered in southern Vietnam. The species, here named asSilvorchis vietnamica, is described and illustrated, with data on its distribution, ecology, phenology and estimated conservation status. A key for identification of the two known species of the genus is also provided. The taxonomic affinities and phylogenetic placement of the newly discovered plant are briefly discussed.
Keywords: Flora of Vietnam, plant diversity, Silvorchis
Silvorchis J. J. Sm.
(Smith 1907, p. 2, Comber 1990, p. 60)
Type: S. colorata J. J. Sm.
2 species in western Java and southern Vietnam.
Silvorchis colorata J. J. Sm.
(Smith 1907, p. 3, Comber 1990, p. 60)
Described from Java.
Distribution, habitat and conservation status: Small achlorophyllous terrestrial herb. Only found once in western Java and only known from the type specimen. Endemic. Humid evergreen montane forests. Around 1600 m a.s.l.
Presumably ‘Extinct’ (EX).
Figure 1. Silvorchis vietnamica sp. nov. Flowering plant in its natural habitat.
Photos by Van Dzu Nguyen and Quang Diep Dinh, correction and design by L. Averyanov.
Etymology: Species name refers to country of its origin.
Leonid V. Averyanov, Van Dzu Nguyen, Khang Sinh Nguyen, Quang Diep Dinh and Tatiana V. Maisak. 2018. Silvorchis vietnamica (Orchidaceae, Orchidoideae, Vietorchidinae), A New Miniature Mycotrophic Species from southern Vietnam. Nordic Journal of Botany. e01883. DOI: 10.1111/njb.01883
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
