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Taiwan Gramineae | Family List | Poaceae | Ischaemum

Ischaemum barbarum var. gibbum (Trin.) Ohwi, Act. Phytotax. Geobot. 11: 175. 1942. Hsu, Fl. Taiwan 5: 666. 1978.


Ischaemum barbarum var. gibbum
leaf cs section

Credit: cs kuoh

Ischaemum barbatum Retz. var. gibbum (Trin.) Ohwi f. nodulosum (Honda) Ohwi, Acta Phytotax. Geobot. 11: 175. 1942; Hsu, Fl. Taiwan 5: 668. 1978.
Ischaemum nodulosum Honda, Bot. Mag. Tokyo 37: 120. 1923. (in Japanese); 38: 50. 1924, Monogr. 363. 1930 (Latin descr.). Type from Taiwan: “Okaseki”, leg. U, Faurie 710.

Plant pubescent all over. Blade about 10 cm long by 5 mm wide; ligule about1.8 mm long, tongue-like, fimbriate on upper margin, hispid on the back. Racemes 2, about 8 cm long. Spikelets paired, more or less similar, the upper pedicellate, the lower sessile and fertile, about 5.5 mm long; rachis-joint and pedicel slender, not thickened. Lower glume as long as the spikelet, transversely rugose, coriaceous, 2-keeled, ciliate along keels, numerous-nerved; upper glume subcoriaceous, numerous-nerved, anastomosing at the apex; as long as the lower glume. Lower floret lanceolate, about 4.5 mm long, lemmas and palea 2-keeled, hyaline; lemma 5-nerved. Upper floret about 3 mm long, hyaline; upper lemma 2-cleft, aristate, palea 2-keeled, oblong. Caryopsis about 0.7 mm long, oblong; embryo 1/2 the length of the caryopsis.

TAIPEI: Taipei City, Sasaki s. n. Sept. 1929*. NTU Campus, Hsu 217.; Kuangyinshan, Chuang 2833. MIAOLI: Chunan, Hsu 490. KAOHSIUNG: Fengshan, Suzuki s. n. Oct. 31, 1934.

Distributed in the Philippines and Taiwan.

leaf surface 表面: (fla)flat surface

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

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: (bcarc)bulliform cell with colorless cells
form an arc-shape

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: 82 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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