牛虱草

Poa unioloides Retz., Obs. Bot. 5: 19. 1789
Eragrostis formosana Hayata, Bot. Mag. Tokyo 21: 53 1907, Mat. Fl. Form. 408. 1911.

Annual. Culm solitary or tufted, erect or decumbent. Ligule wanting or very short. Inflorescence an oblong panicle, about 10 cm long. Spikelets 8-20-flowered, ovate-oblong, extremely compressed, purplish-red when mature, 4-7 mm long, the florets closely imbricate. Glumes acute, 1-nerved, the nerve prominent. Palea usually falling off together with the lemma, 2-keeled, very narrowly winged and minutely ciliate. Anthers 3, about 0.2 mm long. Caryopsis compressed, ellipsoidal, about 0.8 mm long.

TAIPEI: Hsintien, Shimizu 3159; Hsiaokotou, Hsu 6549. ILAN: Lotung, Yamamoto 2645. TAOYUAN: Nankan, Suauki 5834. MIAOLI: Nanchuang, Hsu 12501. TAICHUNG: Tungshih, De Vol et al. 4342. NANTOU: Kuantaochi, Kao & Hsu 340; Puli, Hsu 1392; Wu, Leu & Chiu s. n. July 1970.* YUNLIN: Touliu, Yamamoto & Kamikochi 3794. HUALIEN; Mataian, Yamamoto 3214.

Distributed in tropical Asia and Africa.

This species is very easily recognized by its extremely compressed large spikilets which are pinkish or sometimes pale in color.

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

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: 2

chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (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: 85 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