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Taiwan Gramineae | Family List | Poaceae | Eragrostis

Eragrostis amabilis (L.) Wight & Arn. ex Nees in Hook. & Arn. Bot. Beechey Voy. 251. 1838. Hsu, Fl. Taiwan 5: 478. 1978.


Eragrostis amabilis
leaf cs section

Credit: cs kuoh

Poa amabilis L. Sp. Pl. 69. 1753.
Poa tenella L. Sp. Pl. 69. 1753.
Eragrostis tenella (L.) P. Beauv. ex Roem. & Schult., Syst. Veg. 2: 576. 1817 ; Koyama, Grass. Jap. Neighb. Reg. 257. 1987
Poa plumosa Retz., Obs. Bot. 4: 20. 1788.
Eragrostis plumosa (Retz.) Link, Hort. Berol. 1: 192. 1827; Honda, Monogr. Poac. Jap. 109. 1930.

Annual; culm weak, usually geniculate, 3-4-noded; ligule a ring a short hairs. Inflorescence an oblong panicle, 5-10 cm long, ciliated at axils of branches, glandular. Spikelets 4-8-flowered, ovate, to elliptic-ovate, about 2 mm long; rachilla falling off successively downwards from top to the base; glumes broadly ovate, membranous, 1-nerved, subequal; lower glume slightly smaller, about 2/3 as long as the upper, falling off when mature; lemmas keeled, broadly ovate, about 1 mm long, 3-nerved; palea persistent, or tardily deciduous, long ciliate on the keels, the hairs rigidly spreading at maturity; anthers 3, about 0.3 mm long. Caryopsis ovoid, about 0.5 mm long.

TAIPEI: NTU Campus, Hsu 390; Chinshan, Hsu 1297. ILAN: Ilan, Hsu 87. HSINCHU: Hsinchu, Shimada 408. TAICHUNG: Tatushan, Hsu & Kuoh 10768. CHANGHUA: Lukang, Kuoh 1625. NANTOU: Puli, Hsu 4608. CHIAYI: Chiayi, DeVol 7172. YUNLIN: Huwei, Hsu 469. TAINAN: Tainan, Hsu 285. KAOHSIUNG: Kaohsiung, Hsu 1824. PINGTUNG: Fangliao, Hsu 961; Hsutzoliao, De vol 7303* TAITUNG: Malan, Hsu 998; Tawu, Hsu 1023; Botel Tobago, Liu et al. 175; Green Island, Sasaki 420028. HUALIEN: Tienhsiang, Hsu & Hsu 37.

Widely distributed in the tropics of the Old World.

This grass is one of the most common weeds in Taiwan.

leaf surface 表面: (fla)flat surface, (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

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

no small vein under buliform cells泡狀細胞下無小脈: (bcfan)bulliform cell with colorless cells
extend beneath it

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, (per)large amount and in peripheral site

mestome sheath 內束鞘細胞: (Xyms+)metaxylem pole adjacent with
mestome sheath

distance between two adjancent vein 脈間距: 100-105 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 0.58-1.05

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


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