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Taiwan Gramineae | Family List | Poaceae | Hemarthria

Hemarthria compressa (L. f.) R. Br., Prodr. 207. 1810. Hsu, Fl. Taiwan 5: 657. 1978; Koyama, Grass. Jap. Neighb. Reg. 470. 1987.

扁穗牛鞭草

Hemarthria compressa

Credit: CC Hsu, 1975 Taiwan Grasses

Rottboellia compressa l. f., Suppl. 114. 1781; Honda, Monogr. 369. 1930.
Manisuris compressa O. Ktze., Rev. Gen. Pl. 2: 779. 1891.

Culms ascending, basal part branching and rooting, creeping; the flowering culms up to 1 m high. Blade obtuse, glabrous, 5-10 cm long; ligule of a ring of short hairs; sheath glabrous, shorter than the internode. Spike single, terminal or axillary, sometimes several aggregated, 5-10 cm long; rachis and pedicel united, nearly as long as the sessile spikelet. Spikelets paired, one pedicelled and the other sessile. Sessile spikelets about 4 mm long, with a distinct callus of about 1 mm long, the spikelet sunken in a cavity tormed by the adnation of the rachis and the pedicel; glumes coriaceous; lower glume ovate-lanceolate, dorsally flat; upper glume boat-shaped, nearly as long as the spikelet; lower lemma about 3 mm long, membranous, epaleate, neutral; upper lemma slightly shorter than the lower lemma, enclosing a small upper palea; anthers about 2 mm long. Caryopsis ovate-orbicular, about 2 mm long. Distributed widely throughout India, Ceylon, Burma, Malaysia, China and Japan.

ILAN: Fulong, Kuoh 4161; Chiaohsi, Hsu 819. TAOYUAN: Neili, Hsu 1217. MIAOLI: Chunan, Hsu 485. TAICHUNG: Yehmei, Hsu 4712; Taichung, Kuoh 1527. NANTOU: Tuchen, Kuoh 3870; Puli, Hsu s. n. Oct. 29. 1960. CHIAYI: Fenchihu, Feng & Kao 4947*. TAINAN: Sanhutang, Kuoh 3958. PINGTUNG: Hengchun, Hsu 502.

Usually the culms are straggling among bushes or hedges. It is grazed and liked by all stock. It is a very variable species as to height and shape of the plant.

leaf surface 表面: (sha)upper surface with shallow notch
between the veins

sclerenchyma 厚壁組織: (boscl)(bostr)on both sides of veins as
strand or girder

chlorenchyma 葉綠組織: (radia)cells radiate and lesser than
bundle sheath cell in width

bundle sheath 維管束鞘: (dko)two bundle sheaths the outer one
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: 3

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
mestome sheath

distance between two adjancent vein 脈間距: 70 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 1

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


 

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