Teyleria barbata (Craib) J. A. Lackey ex Maesen (1985: 117)

Jiang, Kai-Wen, Tian, Bin & Pan, Bo, 2022, Legume additions to the flora of China, Phytotaxa 532 (1), pp. 1-21 : 17

. Teyleria barbata (Craib) J. A. Lackey ex Maesen (1985: 117) .

Pueraria barbata Craib (1927: 379) .

Type:— THAILAND. Doi Suthep, alt. 3000 ft., Kerr 2653 (holotype K, isotype BM). Fig. 8.

Description: —Perennial climbing herbs. Stems quadrangular, densely hirsute with spreading yellowish hairs up to 3 mm. Branches trailing along wet ditches by virtue of plenty of adventitious roots rising from lower nodes. Leaves pinnately trifoliolate; stipules basifixed, long ovate, ca. 6 mm, densely hirsute with finer hairs; petioles triangulate in cross section, densely hirsute along ridges; leaflets rhomboid-ovate, 7–15 × 3.5–8 cm, with lateral ones oblique and smaller, acuminate at apex, broadly cuneate at base, adaxial surface sparsely covered with appressed grey hairs, densely hirsute with spreading hairs along margins, abaxial surface hairy much denser, secondary veins 4–5 pairs; petiolules densely hirsute; stipels setaceous, ca. 4 mm, hirsute. Pseudoraceme axillary, 4–12 cm, 2–3 flowers per node, sometimes cauliflorous; rachis angulate. Bracts setaceous, hirsute, ca. 4 mm. Flower ca. 6 mm with a 1 mm pedicel. Calyx 4-lobed, with the upper two teeth almost connate, ca. 2.5 mm, pubescent; Corolla white. Standard obovate, ca. 3 mm, blunt auriculate, with a purple patch in the center, attenuate to a short stalk; wings oblanceolate, ca. 6 mm, auriculate on both sides; keels oblong, ca. 4.5 mm. Stamens monadelphous. Pods linear, 5–8 × 0.5 cm, septate between the seeds. Seed ovoid to quadrate with rounded edges, compressed.

Distribution and habitat: — Teyleria barbata was only known from Thailand before ( Egan & Pan 2015), it is newly recorded in China (Yunnan Province), and possibly distributed in neighbored Laos and Myanmar as well. This herbaceous climber occurs in tropical valleys, and trails along wet ditches or streams.

Phenology: —Flowering in September to October; fruiting in November to next March.

Chinese name: —The Chinese name of Teyleria barbata is here given as 毛ḓā, in which “ 毛 ” is the literal translation of the epithet, while “ ḓā ” is the Chinese common name for the genus Teyleria .

Conservation status: — Teyleria barbata is here considered as Vulnerable [VU, C a(ii)] according to IUCN (2019), and its specific habitats are sensitive to human disturbance.

Specimens examined:— CHINA. Yunnan: Mengla, Jenn-teh Hsien, roadside bushes, Nov. 1936, C. W. Wang 80625 (KUN). Mengla, Xialongyin, in the ditch, 16 th Jul. 2013, B. Pan 35 (HITBC). Mengla, Mohan, Miao Village, Sept. 2013, B. Pan PB024 (NPH). Mengla, Xialongyin, along the stream in the valley, 19 th Sept. 2013, B. Pan, J. X. Liu & H. Gu 44 (HITBC).

Discussion: — Egan & Pan (2015) transferred Pueraria stricta Kurz (1873: 254) to the genus Teyleria Backer (1939: 107) , viz. Teyleria stricta (Kurz) A. N. Egan & B. Pan bis (2015: 208), synonymized T. koordersii ( Backer 1911: 358) Backer (1939: 108) to T. tetragona (Merrill 1910: 122) Maesen (1985: 119) and recognized three species of the genus, and a key to all the three species was provided. The key applies to Chinese Teyleria as well, since all three species can be found in China based on the present research and previous studies ( Sun & Thulin 2010, Wu & Thulin 2010, Egan & Pan 2015).