Volume 10 > Part 2 > Year 2010 > Page 262 > Verbenaceae > Stachytarpheta

Stachytarpheta jamaicensis (L.) Vahlwfo-0000314894

Enum. Pl. I: 206. 1804; H.J.Lam, Verbenaceae Malayan Archipel.: 22. 1919; Ridl., Fl. Malay Penins. 2: 795. 1922; Dop in Gagnep., Lecomte & Humbert, Fl. Indo-Chine 4: 783. 1935; Moldenke in Dassan. & Fosberg, Revis. Handb. Fl. Ceylon 4: 253. 1983; S.L.Chen & M.G.Gilbert, Fl. China 17: 3. 1994.— Verbena jamaicensis L., Sp. Pl.: 19. 1753.

Accepted Name : This is currently accepted.

Description : Shrubby herb to 2 m tall; stems rounded, smooth, glabrous. Leaves ovate, 3–10 x 1.8–5 cm, base cuneate, apex obtuse, attenuate on to the petiole, upper and lower surface glabrous, with scattered hairs, margin crenate; inflorescence terminal, unbranched, up to 50 cm long by 3–4 mm wide; bracts ovate, glabrous with fimbriate margin; calyx tubular, 4-toothed, ca 6 mm long; corolla pale to deep blue or purple, hypocrateriform, tube ca 8 mm long, straight, lobes ca 1.5 mm across; stamens attached above middle with short filaments; style ca 6 mm long, slightly exserted; fruit dark brown to black, reticulate.

Thailand : NORTHERN: Chiang Mai, Lampang; NORTH-EASTERN: Khon Kaen; EASTERN: Nakhon Ratchasima; CENTRAL: Saraburi, Nakhon Nayok; SOUTH-EASTERN: Chon Buri, Rayong, Chanthaburi, Trat; PENINSULAR: Ranong, Surat Thani, Phuket, Trang, Songkhla.

Distribution : Tropical America and widely naturalised throughout tropical and subtropical regions.

Ecology : Open areas, grasslands, roadside, sea strands and river banks.

Vernacular : Chek chap kop (เจ๊กจับกบ)(Trat); dueai ngu (เดือยงู), phra in proi (พระอินทร์โปรย)(Chumporn); phan ngu khiao (พันงูเขียว), saraphat phit (สารพัดพิษ), si bat (สี่บาท)(Central); lang-thueng-duk (ลังถึ่งดุ้ก)(Karen-Mae hong Son); ya nuat suea (หญ้าหนวดเสือ)(Northern); ya hang ngu (หญ้าหางงู)(Peninsular).