Tuesday, February 13, 2018

[Botany • 2018] Paraboea wenshanensis • A New Species of Gesneriaceae from Yunnan, China


Paraboea wenshanensis X.Hong & F.Wen

in He, Feng, Pan, Hong & Wen, 2018.

Abstract
Paraboea wenshanensis is a new species of Gesneriaceae from Yunnan, China and is described and illustrated here. It is morphologically similar to P. angustifolia, P. martinii and P. glutinosa, but the congeners of this new taxon can be distinguished by several salient characters. A description of P. wenshanensis, together with illustrations and photographs, a distribution map and conservation assessment are presented.

Keywords: Limestone flora, karst, new taxon


Figure 2. Paraboea wenshanensis X.Hong & F.Wen.
A Habitat B Adaxial surface view of leaf blade C Abaxial surface view of leaf blade D Cyme with flowers, showing wide campanulate E Frontal view of corolla F Calyx lobes G Opened corolla for showing stamens and pistil H Pistil with calyx lobes and stamens, showing anthers and strongly geniculate filaments I Infructescence with many capsules.

Paraboea wenshanensis X.Hong & F.Wen, sp. nov.

Diagnosis: Paraboea wenshanensis is similar to P. martinii (H. Lév. & Vaniot) B.L. Burtt and P. glutinosa (Hand.-Mazz.) K.Y. Pan in having similar corolla shape and colour, but can be distinguished by its oblong-ovate to elliptic leaf blade, crenate margin, lateral veins 4–8 on each side of midrib, petiole subsessile or up to 3 cm long, broadly obovate, glabrous bracts, 6–8 mm long, glabrous membranous calyx and capitate staminodes. It also morphologically resembles P. angustifolia Yan Liu & W.B. Xu, but can be easily distinguished by the oblong-ovate to elliptic leaf blade, broadly obovate, glabrous bracts, oblong to oblanceolate, glabrous membranous calyx, sparsely glandular puberulent filaments; capitate staminodes and twisted capsule. A morphological comparison between P. wenshanensis and congeners: P. angustifolia, P. martinii and P. glutinosa is provided in Table 1. 

A: Paraboea wenshanensis X.Hong & F.Wen. A-1 plant in habitat A-2 corolla face view B P. angustifolia Yan Liu & W.B. Xu B-1 habitat B-2 flowering habit, B-3 corolla face view 

P. martinii (Lévl.) Burt C-1 flowering habit C-2 corolla face view D P. glutinosa (Handel-Mazzetti) K. Y. Pan D-1 plant in habitat D-2 inflorescense, showing corolla face view.
.....

Etymology: The specific epithet is derived from the type locality, Wenshan National Nature Reserve, Yunnan Province, China.

Vernacular name: Wén Shān Zhǖ Máo Jǜ Tái (Chinese pronunciation); 文山蛛毛苣苔 (Chinese name).

Distribution and habitat: To date, Paraboea wenshanensis is locally abundant and endemic to south-western China, from type locality: Wenshan Nature Reserve, Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan province. This species grows on moist shady cliffs of limestone hills, at an elevation of 1,500 m a.s.l. The average temperature is 14.5 °C, the average annual precipitation has been calculated as ca. 1,022 mm. The forest is a subtropical monsoon climate evergreen broad-leaved forest, with main community types of Ilex polyneura (Hand.-Mazz.) S.Y. Hu, Triadica rotundifolia (Hemsl.) Esser and Debregeasia orientalis C.J. Chen.

Figure 3. A: Paraboea wenshanensis X.Hong & F.Wen. A-1 plant in habitat A-2 corolla face view
B P. angustifolia Yan Liu & W.B. Xu B-1 habitat B-2 flowering habit, B-3 corolla face view
C P. martinii (Lévl.) Burt C-1 flowering habit C-2 corolla face view
D P. glutinosa (Handel-Mazzetti) K. Y. Pan D-1 plant in habitat D-2 inflorescense, showing corolla face view.

 De-Ming He, Yan-Fei Feng, Fu-Zhuan Pan, Xin Hong and Fang Wen. 2018. Paraboea wenshanensis, A New Species of Gesneriaceae from Yunnan, China. PhytoKeys. 95; 83-91.  DOI: 10.3897/phytokeys.95.21586

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