Andropogon annulatus Forsk., Fl. Aegypt. Arab. 173. 1775.
Culm tufted, about 1 mm in diameter, hard, nodes densely covered with silky hairs. Blade 8-10 cm long by 3-4 mm wide, surface covered with tubercle based
silky hairs; ligule chartaceous, about 1 mm long, upper margin fimbriate. Inflorescence of digitate racemes, racemes 2-8, up to 5 cm long, pale purple in color. Spikelets paired, the upper ones pedicelled; the lower ones sessile, about 3 mm long. Lower glume oblong, chartaceous, as long as the spikelet, 5-nerved, lower argins inrolled, upper part 2-keeled, with long tubercled hairs along keels, lower back ciliate; upper glume chartaceous, lanceolate, margins inrolled, fimbriate,
backside 1-keeled, 3-nerved; lemma linear, 1-nerved, tipped with a long flexuous awn arising from the apex, about 6 times the length of the lemma; palea oblong, hyaline, about 2.5 mm long, nerveless; anther about 1.8 mm long; lodicules 2, truncate, conspicuously several-nerved, about 0.3 mm long.
Widely distributed in India, Burma, Tropical and North Africa, now introduced as a fodder in many countries.
PINGTUNG: Pingtung, Chang 6016.
This is a very excellent fodder grass which is sought out by stock from a mixture of grasses and eaten in preference to all others.
midrib 中肋: (sm)small:with one vascular bundle
leaf surface 表面: (fla)flat surface
sclerenchyma 厚壁組織: (mistr)strand variable with size of vein
chlorenchyma 葉綠組織: (radia)cells radiate and lesser than bundle sheath cell in width
bundle sheath 維管束鞘: (sk)single bundle sheath with conspicuous chloroplast
buliform cells well developed 泡狀細胞發達: mainly appear in adaxial side
with small vein under buliform cells泡狀細胞下有小脈: (bcarc)bulliform cell with colorless cells form an arc-shape
chlorenchyma cell number between two adjacent veins: 2
chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (out)large amount and in centrifugal site
mestome sheath 內束鞘細胞: (Xyms -)metaxylem pole adjacent with outer bundle sheath
distance between two adjancent vein 脈間距: 51 micrometer
length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 2
chlorenchyma cell shape in LS 葉綠細胞縱面形狀: lobed