Compilation
Panicum arabicum

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Name

Identification
Echinochloa colona (L.) Link [family GRAMINEAE ] (stored under name); Verified by Data not digitized, Panicum arabicum Steud. [family POACEAE ] Verified by Data not digitized,
Related name
  • Paspalidium desertorum
  • Panicum desertorum
  • Panicum arabicum
  • Echinochloa colona
  • Echinochloa colonum

Flora

Entry for PASPALIDIUM desertorum (A. Rich.) Stapf [family POACEAE]
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 451, (1982) Author: W. D. CLAYTON and S.A. RENVOIZE
Names
PASPALIDIUM desertorum (A. Rich.) Stapf [family POACEAE], in F.T.A. 9: 585 (1920); Chiov., Fl. Somala 1: 331 (1929) & 2: 444 (1932); F.P.S. 3: 507 (1956); R.K.G.: 43 (1958). Type: Ethiopia, Choho, Quartin Dillon (P. holo.)
Panicum desertorum A. Rich. [family POACEAE], Tent. Fl. Abyss. 2: 365 (1851)
Panicum arabicum Steud. [family POACEAE], Syn. Pl. Glum. 1: 63 (1854). Types: Yemen, Fatme, Schimper 807 (K, iso.!). The other specimen cited— Schimper 963—is Echinochloa colona, and does not fit the description
Echinochloa colona (Steud.) A. Chev. var. arabica [family POACEAE], in Rév. Bot. Appliq. 13: 901 (1933)
Information
Tufted perennial from a knotty base; culms 10–60 cm. high, hard, erect or geniculately ascending, sometimes decumbent to form hard stolons. Leaf-blades 3–25 cm. long, 1–4(–8) mm. wide, flat or folded, setaceously acuminate. Inflorescence 4–20 cm. long; racemes 0.5–3 cm. long, their rhachis triquetrous, 0.2–0.4 mm. wide, glabrous to puberulous. Spikelets ovate, 1.7–2.6 mm. long; lower glume obtuse or truncate, 1/3–1/2 the length of the spikelet; upper glume 3/4 to as long as the spikelet; lower floret with a palea, its lemma as long as the spikelet, the nerves not raised; upper lemma granulose or weakly rugulose.
Range
DISTR. K1
Altitude range
300–800 m.
Distribution
KENYA Northern Frontier Province Dandu, 6 May 1952, Gillett 13068! & 62 km. N. of turnoff to Merti from main Isiolo–Wajir road, 19 Dec. 1971, Bally & A.R. Smith 14691! & c.5 km. S. of Lukuloko [Logologo], 12 May 1970, Magogo 1464!
Distribution (external)
Sudan
Ethiopia
Somalia
Arabia
Notes
This species is not always easy to separate from P. geminatum; the hard culms and narrow raceme-rhachis, which is never ciliate, are the best characters. In fact all the East African species are very closely related, and some degree of introgression is to be expected.

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