Digitaria sanguinalis (L.) Scop.  

Digitaria sanguinalis (L.) Scop. Fl. Carn., ed. 2, 1:52 (1771); Bor in Towns., Guest & Al-Rawi, Fl. Iraq 9:478 (1968); Bor in Rech. f., Fl. Iran, 70:491 (1970); Cope in Nasir & Ali, Fl. Pak. 143:231 (1982); Clayton & Renvoize in Polhill, Fl. Trop. East Afr. Gramineae: 650 (1982). Fig. 176, a-c.

English Name:crab grass
vebic Name: Dhifra, Dhifira.
= Panicum sanguinale L., Sp. Pl. 1:57 (1753).
Type: Cultivated at Leiden (L.).
An annual decumbent grass with culms 20-60 cm tall. Leaf-blade linear to linear-lanceolate, 3-30 cm long, 3-8 (rarely more) mm wide. Inflorescence of 2-16 spikes, the spikes digitate or subdigitate in 2 or more whorls or racemose on a central axis, each 3-20 cm long. Spikelets 2.3-3.5 mm long, acute; lower glume minute, 0.2 mm long; upper glume 3-nerved, 1/3 to 1/2 the length of the spikelet; lower lemma 7-nerved, as long as the spikelet, scaberulous on the nerves with minute siliceous spines, appressed pubescent.
Saudi Arabia: All regions. Often a nasty weed in cultivated areas. Sakaka, S. Chaudhary 630 (RIY); Unaiza, S. Chaudhary 713, 3879 (RIY); Riyadh, S. Chaudhary 6181, 6182 (RIY); Dirab, S. Chaudhary 6183 (RIY); Abu-Arish, S. Chaudhary & Z. Howaishel 712 (RIY); Jizan, A. Wilton 6184 (RIY).
Distribution: Almost a cosmopolitan weed.