Panicum patens L., Sp. Pl. 58. 1753.
Annuals; culms slender, basal nodes branching and rooting, decumbent, 15-50 cm high. Blades narrowly
ovate to linear-lanceolate, more or less covered with appressed short hairs, 4-12 cm long, 4-8 mm
wide, acute; ligule rounded, 0.5-1 mm long; sheath ciliate along margins and mouth of sheath. Panicle
5-15 cm long, branches and pedicels capillary. Spiklelets gibbous abaxially, laterally compressed, ca.
1.5 mm long, usually purplish brown; lower glume ovate, acute, 3-veined, ca. 1/2 as long as spikelet;
upper glume boat shaped, obtuse, 3-veined, ca. 2/3 as long as spikelet; lower lemma nearly as long as
spikelet, margins ciliated, 5-veined; upper lemma ca. 1.5 mm long, glabrous, gibbous, with a scar at
summit, shortly pedicellate; upper palea oblong, included in upper lemma.
ILAN: Chaochi, Hsu 830, Kueishan, Hsu 884. TAIPEI: Hsienkungmiao, Hsu 22; Kuanyingshan, Hsu 1159.
TAOYUAN: Neili, Hsu 1249. MIAOLI: Senghsing, Hsu 1364; Taen, Hsu s. n. TAICHUNG: Kukuan, Hsu 457.
CHANGHUA: Pakuashan, Mori 656. NANTOU: Chingshuikou, Huang 24. PINGTUNG: Kenting, Hsu 1100-3.
TAITUNG: Chipen, Hsu 976; Tsaopu, Hsu 1079. HUALIEN: Yuli, Suzuki 5368.
Southeastern Asia. Taiwan, in open forest and shady places.
leaf surface 表面: (nod)nodules on both surfaces
sclerenchyma 厚壁組織: (boscl)(bostr)on both sides of veins as strand or girder
chlorenchyma 葉綠組織: (isach)cells elongate and radiate upward like crab legs
bundle sheath 維管束鞘: (nks)bundle sheaths with small amount of chloroplast
buliform cells not well developed 泡狀細胞不發達: (smreg)epidermal cells gradually enlarge from vein to intervein
chlorenchyma cell number between two adjacent veins: 11
chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (lit)with a little of chloroplast
mestome sheath 內束鞘細胞: (Xyms+)metaxylem pole adjacent with mestome sheath
distance between two adjancent vein 脈間距: 245 micrometer
length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 3