Sedum laxum subsp. laxum, Sedum moranii, Sedum citrinum, Sedum kiersteadiae, Sedum patens, Sedum rubiginosum, et al. ... in Zika, Wilson, Brainerd, et al., 2018. |
Abstract
Sedum section Gormania was restricted to Oregon, Nevada and California in the western United States. After extensive field work from 2011 to 2016, we revised 17 members of the group using floral and vegetative characters, resulting in the acceptance of four new taxa in California. A serpentine endemic from the mountains of western Tehama County was recognized as S. rubiginosum. It was separated from S. kiersteadiae by its dense rosettes, overlapping stem leaves and non-apiculate corolla. A serpentine endemic from low elevation canyons in Del Norte County was described as S. patens. It was distinguished from S. laxum by its white spreading petals and yellow anthers. A plant of high elevation, serpentine and non-serpentine sites in Siskiyou County was circumscribed as S. marmorense; it differed from S. oregonense in its sepals and inflorescence with a thick granular waxy deposit, and leaves in dense rosettes. Sedum paradisum was segregated from S. obtusatum, raised to species level, and divided into two subspecies. Plants of the northern Sierra Nevada were newly defined as S. paradisum subsp. subroseum, separable with nodding young flowering shoots and a disjunct range in Butte, Plumas and Sierra counties. Sedum flavidum and Sedum eastwoodiae were removed from S. laxum sensu stricto, and raised to species rank, based on floral characters. We clarified the concept of S. obtusatum subsp. retusum, and restored it to the rank of species as S. sanhedrinum; it was restricted to Glenn, Lake, Mendocino, and Tehama counties, California. Sedum flavidum and S. oregonense as defined here showed more morphological variation than previously understood. Finally, we remarked on hybridization and cleistogamy observed in the field.
Keywords: Sedum, new species, California, Eudicots
Taxonomic Treatment
1. Sedum albomarginatum Clausen (1975: 424).
2. Sedum citrinum Zika (2014: 112).
3. Sedum eastwoodiae (Britton in Britton & Rose 1903: 31) Berger (1930: 451).
4. Sedum flavidum (Denton 1978: 233) B.L. Wilson & Zika, comb. nov., stat. nov.
Sedum laxum (Britton in Britton & Rose 1903: 29) Berger (1930: 451) subsp. flavidum Denton (1978: 233) (basionym). Sedum laxum (Britton) A.Berger var. flavidum (Denton) Ohba (2007: 889).
5. Sedum kiersteadiae B.L.Wilson & R.E.Brainerd in Wilson et al. (2014: 9).
6. Sedum laxum (Britton in Britton & Rose 1903: 29) Berger (1930: 451)
6a. Sedum laxum (Britton in Britton & Rose 1903: 29) Berger (1930: 451) subsp. heckneri (Peck 1937: 121) Clausen (1942: 39).
Sedum heckneri Peck (1937: 121). Sedum laxum (Britton) A.Berger var. heckneri (M.Peck) Ohba (2007: 889).
6b. Sedum laxum (Britton in Britton & Rose 1903: 29) Berger (1930: 451) subsp. laxum.
Sedum laxum (Britton) A.Berger subsp. latifolium Clausen (1942: 38). Sedum laxum (Britton) A.Berger var. latifolium (R.T.Clausen) Ohba (2007: 890).
7. Sedum marmorense Otting & R. E. Brainerd, sp. nov.
Species Sedum oblanceolatum proxima sed differt foliis basalibus rosulatis obovatis, a Sedum oregonensis rosulis densissimis et inflorescentiis granularibus ceraceisque.
Etymology:— Sedum marmorense, or Marble Mountains stonecrop, was named for the Marble Mountains and for the marble substrate on which it sometimes grows.
8. Sedum moranii Clausen (1942: 40).
Cotyledon glandulifera Henderson (1930: 26).
Sedum glanduliferum (L.F.Hend.) Peck (1941: 134).
Gormania glandulifera (L.F.Hend.) Abrams (1944: 343).
9. Sedum oblanceolatum Clausen (1975: 404).
10. Sedum obtusatum Gray (1868: 342).
Gormania obtusata (A.Gray) Britton in Britton & Rose (1903: 29).
Cotyledon obtusata (A.Gray) Fedde in Schumann & Fedde (1904: 827).
Echeveria obtusata (A.Gray) Nelson & Macbride (1913: 476).
11. Sedum oregonense (Watson 1882: 373) Peck (1941: 361).
Cotyledon oregonensis Watson (1882: 373).
Gormania watsonii Britton in Britton & Rose (1903: 29).
Echeveria watsonii (Britton) Nelson & Macbride (1913: 476).
Sedum watsonii (Britton) Tidestrom in Dayton (1927: 119, as “watsoni”).
12. Sedum paradisum (Denton 1978: 236) Denton ex B. L. Wilson, stat. nov.
Sedum obtusatum Gray (1868: 342) subsp. paradisum Denton (1978: 236) (basionym). Sedum obtusatum A.Gray var. paradisum (Denton) Ohba (2007: 889).
12a. Sedum paradisum (Denton 1978: 236) Denton ex B. L. Wilson subsp. paradisum.
12b. Sedum paradisum (Denton 1978: 236) Denton ex B. L. Wilson subsp. subroseum B. L. Wilson & Zika, subsp. nov.
Species nostra Sedum paradisum subsp. paradisum aemulans, differt axe inflorescentiae juvenili nutante, a Sedum obtusatum subsp. obtusatum floribus albis postea saepe pallide erubescentibus recedens.
Etymology:— Sedum paradisum subsp. subroseum, or Plumas stonecrop, was named for its flowers, which usually turned pinkish and with age gave the entire inflorescence a rosy appearance.
13. Sedum patens Zika, sp. nov.
Species insignis Sedum laxum eximie affinis sed petalis niveis apicibus patentibus necnon antheris luteis notabilis.
Etymology:— Sedum patens, or Smith River stonecrop, was named for the widely spreading petals.
14. Sedum rubiginosum Zika & B. L. Wilson, sp. nov.
Differt haec species a Sedum kiersteadiae rosulis foliorum densis, floribus numerosioribus, sine vel reduci mucrone abaxiali subterminali, necnon foliis caulinis numerosis imbricatisque.
Etymology:— Sedum rubiginosum, or Tedoc stonecrop, was named for the reddish colors found in the fresh and aged petals, as well as the rusty red anthers.
15. Sedum sanhedrinum Berger (1930: 451).
Gormania retusa Rose in Britton & Rose (1903: 31).
Cotyledon retusa (Rose) Fedde in Schumann & Fedde (1904: 828).
Sedum laxum (Britton in Britton & Rose 1903: 29) Berger (1930: 451) subsp. retusum (Rose) Clausen (1942: 39).
Sedum obtusatum Gray (1868: 342) subsp. retusum (Rose) Clausen (1975: 375).
Peter F. Zika, Barbara L. Wilson, Richard E. Brainerd, Nick Otting, Steve Darington, Brian J. Knaus and Julie Kierstead Nelson. 2018. A Review of Sedum section Gormania (Crassulaceae) in western North America. Phytotaxa. 368(1); 1–61. DOI: 10.11646/phytotaxa.368.1.1
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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل
او
شاهد هذا الفيديو القصير لطريقة التحميل البسيطة
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
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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
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.
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