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Taiwan Gramineae | Family List | Poaceae | Pogonatherum

Pogonatherum crinitum (Thunb.) Kunth, Enum. Pl. 1 : 478. 1833. Hsu, Fl. Taiwan 5: 683. 1978; Koyama, Grass. Jap. Neighb. Reg. 418. 1987.


Pogonatherum crinitum

Andropogon crinitus Thunb., Fl. Jap, 40. pl. 7. 1784.

Perennials; culms tufted, erect, 3-6-noded, nodes bearded. Ligule short, ciliated. Inflorescence a single raceme, 1.5-3 cm long; rachis-joints ciliated, about 3/5 as long as the spikelet. Spikelets paired, dimorphic, the pedicellate spikelet smaller than the sessile one, both with 2 long awns of about 1.5-2.5 mm long. Sessile spikelets oblong, about 1.8-2 mm long; glumes papery; lower glume truncate, fringed, about 1.8 mm long, 2-nerved, awnless; upper glume with a longer awn, 1-nerved, as long as the lower, or slightly longer; lemma membranous; lower lemma oblong-lanceolate, nerves obscure, about 1.2 mm long, 2-cleft, awnless, palea wanting; upper lemma as long as the lower, with a long awn; upper palea membranous, filiform, about 1-1.8 mm long; stamen 1.

TAIPEI: Yinghotung, Hsu 10804*. HSINCHU: Chutung, Shimizu 34. TAOYUANH: Hsishehsiang, Kuoh 1513. MIAOLI: Tsuhuangkeng, Hsu 116: Chuana, Hsu 491. NANTOU: Chitou, Hsu 3157. KAOHSIUNG: Shanping, Moo 2152. TAITUNG: Chihpen, Hsu 988; Botel Tobago, Hsu 4976, Green Island, Sasaki s. n. July 4, 1935. HUALIEN: Suhua Highway, Kuoh 2672.

Distributed in India, ascending in the hills to 1,500 m, extending to China, Malaysia and Japan.

midrib 中肋: (la)large:several vascular bundles

leaf surface 表面: (nod)nodules on both surfaces

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, distinctive cells presented 特異細胞

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: (fansh)bulliform set shell-shaped or fan -shaped

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: 64 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 3

chlorenchyma cell shape in LS 葉綠細胞縱面形狀: lobed


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