Volume 6 > Part 4 > Year 1998 > Page 297 > Cyperaceae > Fimbristylis

3. Fimbristylis dura (Zoll. & Moritzi) Merr.wfo-0000420523

Philipp. J. Sci., Bot., 11: 53. 1916; J.Kern, Reinwardtia 6: 38. 1961; in Fl. Males., Ser. 1, Spermat. 7: 554. 1974; Raymond, Dansk. Bot. Ark. 23: 325. 1966; T.Koyama, Bot. Mag. Tokyo 87: 311. 1974; Hô, Câyco Viêtnam III. 2: 645. 1993.— Isolepis dura Zoll. & Moritzi in Moritzi, Syst. Verz. Zoll. Java Pfl. 97. 1846. Plate XXV: 3.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Perennial. Rhizome stout, woody. Culms 1-several, 35–120 cm by 1.5–3 mm, 4 angled, scabrous on angles. Leaves basal, 2-ranked; blade linear, (15–)20–80 cm by 3–6 mm, subacute, flattish, margins incurved; sheath 2–15 cm long, truncate, light brown to chestnut brown; ligule 0. Involucral bracts 3–5, the longest exceeding inflorescence, 7–27 cm long. Inflorescence compound, 6–20 by 6–18 cm; primary branches 8–15, 5–15 cm long. Spikelets solitary, narrowly linear-cylindric, somewhat angular, 6–11 by 1.3–1.5 mm. Glumes many per spikelet, spirally imbricate, ovate-deltoid, 1.8–2 by 1.4–1.5 mm, acute, mucronulate, sides membranous, shiny brown or reddish brown, margins paler, hyaline, keel acute, 3-nerved, greenish brown. Stamens 2–3; anthers 0.8-1 mm long. Stigmas 3. Nutlets oblong-obovoid to ± ellipsoid, trigonous, 0.7–1 by 0.5–0.6 mm, pale brown, finely transversely lineolate.

Thailand : NORTHERN: Tak (Pop Pra), Phitsanulok; EASTERN: Nakhon Ratchasima; SOUTH-WESTERN: Ratchaburi (Bangtaphan); CENTRAL: Saraburi (Sahm Lahn); SOUTH-EASTERN: Prachin Buri (Sa Kaeo), Chanthaburi (Makham); Trat (Ko Chang, Ko Kut); PENINSULAR: Surat Thani, Phangnga (Thai Muang), Phuket (Ko Pok), Nakhon Si Thammarat (Lansaka), Phatthalung, Trang, Songkhla (Don Nga Chang, Ton Ta Saw), Pattani, Narathiwat (Khao Nikom Waeng).

Distribution : India and Sri Lanka, through Indochina to Java (type) and Borneo.

Ecology : Grassy places in open forests, more rarely in rice fields and along river banks, 5–600 m alt.

Notes: Characteristically occurs in open forested areas. Small individuals resemble larger plants of Fimbristylis complanata. However, the former can be distinguished by the absence of a ligule and longer involucral bracts.