Andropogon ischaemum L., Sp. Pl. 1047. 1753.
Andropogon ischaemum L. var. radicans Hack. in DC., Monogr. Phar. 6: 476. 1889
Honda, l. c. 343. 1930.
Andropogon taiwanensis Ohwi, Journ Jap. Bot. 12: 652. 1936.
Annuals; culms tufted and the base geniculate, nodes usually bearded; ligule membranous, rounded, about 1 mm long. Spikelets paired, dimorphic; pedicelled spikelets darker than the sessile. Sessile spikelets about 4 mm long, oblonglanceolate, dorsally concave, villous below; pedicei and rachis villous; glumes papery, pubescent dorsally, margins slightly membranous, ciliate; lower glume pointed, 2-keeled, about 4 mm long, 5-nerved; upper glume pointed, as long as the lower glume, 3-nerved; lower lemma oblong-lanceolate, acute, slightly bifid, awnless, about 2 mm long, nerves obscure; upper lemma linear, as long as the lower, with a terminal long awn of about 1 cm long, 1-nerved, upper palea oblong-lanceolate, about O.5 mm long; anthers about 2 mm long.
TAIPEI: Tanshui, Kao 5526. HSINCHU: Hsinchu, Masamune s. n. Oct. 5, 1930. TAICHUNG: Taichung, Kuoh 1891. CHANGHUA: Tsaopu, Hsu 1093. YUNLIN: Huwei, Cheng & Kao 3057. TAINAN: Tainan, Hsu s n. June 30, 1960, Hsu 6465. KAOHSIUNG: Hsiaoliuchu, Chuang 3126. PENGHU: Shiyu, Hsu & Kuoh 14036. PINGTUNG: Tungkang, Hsu 126; Kenting, Hsu 5I9; Fengliao, Hsu 957*. TAITUNG: Chihpen, Sasaki 326.
Widely distributed in Northwest Himalaya, ascending to the Tibetan plateau at 4,000 m. Also found in southern Europe, North Africa, extending to China and Taiwan.
A very common grass growing in dry poor soils in southern Taiwan.
leaf surface 表面: (fla)flat surface
sclerenchyma 厚壁組織: (noscl)no except large 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: (per)large amount and in peripheral site
mestome sheath 內束鞘細胞: (Xyms -)metaxylem pole adjacent with outer bundle sheath
distance between two adjancent vein 脈間距: 73 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