Flemingia trifoliata (Jungh.) C.Y. Wu (1946: 175)

Do, Truong Van & Gao, Xin-Fen, 2020, Taxonomic revision of the genus Flemingia (Leguminosae) from Indo-Chinese floristic region, Phytotaxa 429 (1), pp. 1-38 : 21-22

6. Flemingia trifoliata (Jungh.) C.Y. Wu (1946: 175) . Lepidocoma trifoliatum Jungh. (1845: 338) . Type:— INDONESIA. Java, between

Mt. Lawu and Solo river, Junghuhn 107 (K)

Flemingia involucrata Wall. ex Benth. (1852: 246) . Type:— MYANMAR. Wall.Cat. 5750.

Flemingia capitata Zoll. ex Miq. (1855: 166) . Type:— INDONESIA. East Java, southern plains, Zollinger & Moritzi 2670 (Holotype, BM;

isotype, G).

Shrub, up to 1.8 m tall. Stems quite woody below, densely hairy. Petiole 1–2.5 cm long, wingless, densely villous; petiolules 1-2 mm, hairy. Stipules lanceolate, 0.8–1.8 cm long, 6–7 cm wide, striate, hairy, caducous. Leaves digitately 3-foliolate, leaflets elliptic to obovate, 3–10 cm long, 1.5–6 cm wide, apex rounded-acute, sometimes with short acumenate, mucronate, base cuneate to rounded, adaxial surface dark-green and white-pubescent, abaxial surface grey-green, gland-dotted, pubescence mainly on the veins; lateral veins pinnate, 8–12 pairs, distinct and prominent on abaxial surface. Inflorescences capitate, involucrate, axillary and terminal, 2–3.5 cm diam; bracts stipule-like, surrounding the flowers, 1–1.5 cm long, pubescent. Flowers mauve, purple or pink; pedicel extremely short. Calyx tube 5–7 mm long, calyx lobes narrowly lanceolate, 10–13 mm long, densely covered with long hairs. Corolla purple or mauve, standard 1–1.5 cm long, 1–1.2 cm wide, dorsally hairy, wings gland-dotted. Pods ovoid, 6–7 mm long, 3.5 mm wide, hairy. Seeds 1, oblong-ovoid, ca. 2–3 mm in diam., black, with irregular shallow grooves.

Iconography citation: — Nguyen (1979: 145): plate 23, figure 1; Wei (1995: 320): plate 76, figure 2; Pham (1999: 968), figure 3880; Maesen (2012: 34), figure 1.

Ecology and phenology: — Flemingia trifoliata is found in damp places among grasses, grassland, open forests on sandy clay, and creek margins, from sea level to at least 1000 m. Flowering from February to April, and fruiting from June to December.

Distribution: — Myanmar, China, Thailand, Cambodia, Laos, and Vietnam.

Notes: The epithet “ involucrate ” was placed to trifoliata by C.Y. Wu (1946). Junghuhn’s name (from 1845) predates Bentham’s combination (of 1852), which was based on Lespedeza involucrata , a “ nomen nudum ” in Wallich’s list n. 5742 (1831), which bears no descriptive note at all. The combination by C.Y. Wu was apparently overlooked in treatment by Mukerjee (1953), Thuan (1979), Van der Maesen (1985), Ho (1999), Sa & Gilbert (2010).

Representative specimens: — CAMBODIA. Stung Treng: Chep-Tala Boriat, M.E. Poilane 14233 (P) ; Siem Reap: Konkril, Anlong Veng , 1 November 1927, M.E.Poilane 13900 (P, AAU) . LAOS. Xieng Khouang: Plaine des Jarres , Petelot 4925 (P) . VIETNAM. Bac Giang: plaine de Chu, Balansa 1257 (P) ; Kon Tum: route de Pleiku, Schmid 732

(P); Ninh Thuan: route de Phan Thiet, Schmid 34 (P). THAILAND. Banteng : 25m, November 1930, A.Marcan 2585 (AAU) ; Aran Pratet : October 1928, M.E.Poilane 6265 (AAU) ; N.Beusekom & Gusink 4294 (BO). CHINA. Yunnan: Xichuan , 29 November 1974, G.Tao 13414 (HITBC-019321) ; Cheli , October 1936, Q.Wang 81006 (PE-00379657) ; Xiangming , 5 December 1962, Y.Li 4497 (KUN-0611927) ; Mengding , 550 m, 22 November 1958, T.Zhu 345 (KUN-0611926) .