3.2.1 Arundo donax L.
Perennial habit, rhizomatus, erect culm, 100cm to 250 cm in length. leaf blades lanceolate in shape, rounded at lower side, pointed at tip, with a glaberous surface. Leaf size ranging from 23-51 cm lengthwise and 2-6 mm in width. Lacerate Membranous ligule, 0.5- 0.7 mm lengthwise. Inflorescence: panicle 17-29cm in length, Spikelets ranging in size from 10-15 mm. Glumes unequal, lanceolate in shape, 3 veined, dark purple or brown in colour. upper glume longer in size as compared to lower glume. Upper glume 6-10mm long while lower glume ranges from 4.5 -8mm in length. Floret size ranges from 2-3 mm. Lemmas lanceolate, long hairs arising from base, 3 nerved, 4-6 mm in length. Palea shorter then lemma, 2-5 mm in length. Anthers of orangish yellow colour with size of 1.5-2 mm. Caryopsis 4-5 mm, oblong in shape.