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Wednesday, March 20, 2019

[Botany • 2018] Lysimachia tianmaensis (Primulaceae) • A New Species from Anhui, China ---ScRaBBlE


 Lysimachia tianmaensis K. Liu, S.B. Zhou & Ying Wang

in Wang, Ma, Zhou & Liu, 2018.

Abstract
A new species of Lysimachia (Primulaceae), Lysimachia tianmaensis K. Liu, S.B. Zhou & Ying Wang sp. nov., is described and illustrated from Jinzhai County, Anhui, China. It is endemic to Dabieshan Mountain, China. The new species has yellow flowers and belongs to the subgenus Lysimachia section Nummularia series Grammicae. It is very easily distinguishable from other related species by having alternate leaves with brown patches beneath and an auriculated leaf base.

Keywords: Lysimachia, species nova, China, taxonomy

Figure 1.  Lysimachia tianmaensis sp. nov. (A) the upper part in flowering period B opened corolla showing stamens C pistil and calyx. Scale bars = 1 cm.

 Figure 3. Lysimachia tianmaensis sp. nov.
A plant in flowering B flower C young fruit D leaves showing winged petiole with auriculate base E blades showing brown patches abaxially F habit in flowering.

Lysimachia tianmaensis K. Liu, S.B. Zhou & Ying Wang, sp. nov.

Type: CHINA. Anhui Province: Jinzhai County, Tianma National Nature Reserve, growing at margins of mountain roads, elevation ca. 1165 m, 1 June 2009 (fl.), Kun Liu 2009042 (holotype: ANUB!; isotypes: ANUB!, IBK!).

Diagnosis: Lysimachia tianmaensis is similar to Lysimachia grammica Hance in the alternate leaves, but differs by having a larger blade with brown patches beneath, an auriculate leaf base and subcapitate inflorescences.

Description: Herbs perennial, 15–45 cm tall. Stems often many, erect or arcuate at base, terete, simple or short branched, with tangled multicellular hairs. Leaves alternate, occasionally opposite on lower part; petiole 3–25 mm, broadly winged, base auriculate on leaves from middle and lower part of stems and branches. Leaf blades ovate to ovate-elliptic, rarely ovate-lanceolate, 1.5–5.5 × 1.0–3.5 cm, abaxially multicellular hairs, brown patches, adaxially pubescent, base broadly cuneate to subrounded, apex acute to subobtuse; veins 2 or 3 pairs, inconspicuous. Flowers solitary, in axils of apically diminished leaves, often in shortened, nearly capitate inflorescences at apex of stems and branches. Pedicel densely covered with multicellular hairs; lowest pedicels 2–3 cm, gradually reduced in length in upper flowers, recurved in fruit. Calyx lobes ovate-lanceolate, 6–7 × 1–1.4 mm, abaxially sparsely pubescent. Corolla yellow; tube 0.5–1 mm; lobes ovate or rhomboid-ovate, 8–11 × 5–7.5 mm, transparent glandular. Filaments connate basally into a 0.5–1 mm high ring, free parts 2.5–3 mm; anthers dorsifixed, opening by lateral slits. Ovary pubescent; style 5–6 mm. Capsule subglobose, 3.5–5 mm in diam. Fl. Apr–Jun.


  
Distribution and habitat: Lysimachia tianmaensis is endemic to Dabieshan Mt., China (including Jinzhai County, Yingshan County etc.), growing at margins of mountain woodlands, roadsides or under broad-leaved forests at altitudes of 600–1200 m.

Etymology: The epithet “tianmaensis” is derived from the type locality, Tianma National Nature Reserve, Jinzhai Xian, Anhui Province, China.

Vernacular name: China: tian ma guo lu huang.


 Ying Wang, Wen Ma, Shoubiao Zhou and Kun Liu. 2018. Lysimachia tianmaensis (Primulaceae), A New Species from Anhui, China. PhytoKeys. 98: 117-124.  DOI: 10.3897/phytokeys.98.23751


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