Volume 4 > Part 3.3 > Year 2023 > Page 708 > Leguminosae-Papilionoideae > Vigna

16. Vigna umbellata (Thunb.) Ohwi & H.Ohashiwfo-0000189344

J. Jap. Bot. 44: 31. 1969; Verdc., Kew Bull. 24(3): 560. 1970; Bot. Bull. Dept. Forests Papua New Guinea 11: 525. 1979; Maréchal et al., Boissiera 28: 214. 1978; Thuân in Aubrév. & J.-F.Leroy, Fl. Cambodge, Laos & Vietnam 17: 190. 1979; Grierson & D.G.Long, Fl. Bhutan 1(3): 701. 1987; R.H.Maxwell in Dassanayake & Fosberg, Revis. Handb. Fl. Ceylon 7: 337. 1991; N.Tomooka et al., Asian Vigna: 108, f. 4.40, 4.41. 2002; T.L.Wu & Thulin in C.Y.Wu et al., Fl. China 10: 258. 2010.— Dolichos umbellatus Thunb., Trans. Linn. Soc. London 2: 339. 1794.— Azukia umbellata (Thunb.) Ohwi, Fl. Jap.: 691. 1953; Bull. Natl. Sci. Mus. Tokyo 33: 77. 1953. Fig. 34.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Perennial herb; stems twining, sparsely to densely retrorse light brown villous. Stipules peltate, elliptic, narrowly elliptic, often slightly falcate, 9–18 by 1.5–3.5 mm, apex acuminate or acute, base obtuse or acute, margin entire, outside densely villous, inside glabrous, persistent. Leaves: petioles 4–20.5 cm long, sparsely to densely villous; rachis 1–4 cm long, sparsely to densely villous. Leaflets ovate, broadly ovate or suborbicular, 4–13 by 2.5–10.5 cm, often shallowly 3-lobed, apex acuminate or attenuate and apiculate, base rounded, truncate, obtuse or cuneate, margin entire, both surfaces sparsely pubescent, glabrescent, or glabrous; lateral veins 5–10 pairs; petiolules 3–5 mm long, densely villous; stipels linear, 3–6 by ca 0.5 mm long, apex attenuate or acuminate, glabrous. Inflorescence axillary, 8–16-fascicled, arranged in nodose-pseudoracemes; peduncles 8–12 cm long, sparsely to densely villous; axis 4–8 cm long, sparsely to densely villous; bracts lanceolate, ca 3 by 1 mm, apex attenuate, glabrous. Flowers 2 in each fascicle, bright yellow; pedicels 3–6 mm long, sparsely to densely puberulous; bracteole attached to pedicel lanceolate, ca 3 by 0.8 mm, apex acuminate, caducous; bracteoles appressed to base of calyx tube linear or subulate, 4–5 by 0.5–0.8 mm, as long as or slightly longer than calyx, apex acuminate, outside and along margin sparsely pubescent, inside glabrous, persistent. Calyx green or purplish green; tube 2.5–3 by 3.5–5 mm; upper lobes connate, apex divided to form shallow lobes, ca 0.5 mm long, obtuse or acute; lower lobes deltoid, ca 2 mm long, apex acute, sparsely puberulous both sides and along margin. Corolla: standard bright yellow, obliquely reniform, 0.9–1.2 by 1.2–1.6 cm, inside with 1 appendage at centre, 1–1.5 mm long, apex emarginate or retuse, base with 2 auricles, 0.8–1 mm long, claw 1.5–2 mm long; wings bright yellow, obovate, 1.1–1.3 by 0.7–0.8 cm, apex obtuse, near base with 1 appendage, 1–1.8 mm long, claw 2.5–3 mm long; keel yellow or greenish yellow, falcate, 1.5–1.9 by 0.3–0.5 cm, spirally incurved upward to beak, apex truncate, near base with 1 small appendage, 0.5–0.8 mm long, claw 3–4 mm long, left petal with a horn-like pocket, 4.5–5.5 mm long. Stamens: filaments white, 1.5–1.8 cm long; anthers yellow, elliptic, 0.5–0.8 mm long. Pistil 2.2–2.3 cm long; ovary linear, sparsely pubescent; style sometimes twisted, beak beyond the stigma ca 0.8 mm long; stigma light green. Pods: young pods green, dry pods brown, linear, 4–8 by 0.2–0.5 cm, pendulous, glabrous, base stipitate, 2–3 mm long; fruit stalk 4–7 mm long, sparsely pubescent. Seeds 5–10, young seeds green, dry seeds reddish brown, ellipsoid, 4–5 by 1.8–2.5 mm, with well-developed aril.

Thailand : NORTHERN: Chiang Mai (Chang Khian, Chiang Dao, Doi Chiang Dao WS, Doi Saket, Doi Suthep-Pui NP, Fang, Mae Chaem, San Pa Tong), Chiang Rai (Doi Tung, Wiang Pa Pao), Nan (Doi Phu Kha NP), Lamphun (Doi Khun Tan NP), Lampang (Chae Son NP), Tak (Bhumibol Dam, Mae Sot, Mae Tho), Phitsanulok (Ban Nam Khlat), Kamphaeng Phet (Klong Lan NP); EASTERN: Nakhon Ratchasima (Pak Chong); SOUTH-WESTERN: Kanchanaburi (Kroeng Krawia, Sai Yok, Sangkhla Buri, Thong Pha Phum, Thung Kang Yang); CENTRAL: Lop Buri (Sap Champa), Krung Thep Maha Nakhon (Bangkok) (Thon Buri); SOUTH-EASTERN: Chon Buri (Thung Prong).

Distribution : Wild and cultivated in India, Myanmar, China, Japan (type), Laos, Cambodia, Vietnam, Malaysia, Indonesia, the Philippines.

Ecology : Open or disturbed areas, waste grounds, near the streams, roadsides, near agricultural areas, edge of forests, montane rain forests or mixed deciduous forests, often cultivated; 0–1,575 m alt. Flowering and fruiting: October–February.

Vernacular : Thua daeng (ถั่วแดง), thua nio nang daeng (ถั่วนิ้วนางแดง)(Bangkok); ma pae (มะแป๋), thua pae(ถั่วแป๋), thua ma pae (ถั่วมะแป๋)(Chiang Mai).

Uses: Young pods are eaten as vegetables and seeds are used to make desserts.