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Taiwan Gramineae | Family List | Poaceae | Cyrtococcum

Cyrtococcum patens (L.) A. Camus, Bull. Mus. Hist Nat. (Paris). 27: 118. 1921; Hsu, Fl. Taiwan 5:537. 1978.


Cyrtococcum patens
cyrtococcum patens

Credit: CC Hsu

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


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