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Taiwan Gramineae | Family List | Poaceae | Saccharum

Saccharum spontaneum L., Mant. Alt. 183. 1771. Hsu, Fl. Taiwan 5: 689. 1978; Koyama, Grass. Jap. Neighb. Reg. 414. 1987.

甜根子草

Saccharum spontaneum
color slide

Credit: CS Kuoh

Saccharum arenicola Ohwi, Bull. Tokyo Sci: Mus. 18: 2. 1947.
Saccharum spontaneum L. var. roxburghii Honda., Bot. Mag. Tokyo 37: 302. 1924; Monogr. 395. 1930.
Saccharum spontaneum var. roxburghii Honda, Bot. Mag. Tokyo 39: 1925; Hsu, Fl. Taiwan 5: 691. 1978

Perennials; rhizomes and culms erect, farinose below the nodes, hairy below the inflorescence. Ligule obtuse, about 2 mm long, shortly ciliate. Inflorescence a large panicle of about 20 cm long, branches erect, rachis and pedicels slender. Spikelets paired, monomorphic, lanceolate, 3-5 mm long, usually dark-brown, whitish and pointed above, the callus with silky hairs; glumes persistent, pointed, coriaceous at the base; lower glume ciliate on margins, 3-5 mm long, 2-keeled; upper glume boat-shaped, margins ciliate, slightly smaller than the lower, 1-keeled; lower lemma oblong, fringed at the apex, margins ciliate, about 3 mm long, nerves obscure; palea wanting; upper lemma linear-elliptical, pointed, slightly fringed, about 3 mm long; palea about 1 mm long, upper margin fringed. Caryopsis about 1.5 mm long, embryo 2/3 the length of the grain. Widely distributed in the warmer regions of Old World.

TAIPEI: Taipei City, Tanaka & Shimada s. n. Nov. 1934*. Hsinchuan, Sasaki s. n. Nov. 12, 1933. MIAOLI; Houlung, Sasaki 5. TAINAN: Tachiading, Morimoto 689. PINGTUNG: Tsutien, Hsu 525. TAITUNG: Botel Tobago. Sasaki s. n. Sept. 20, 1937.

A very common grass in gravelly river beds which are usually nearly dry except during floods.

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: (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
mestome sheath

distance between two adjancent vein 脈間距: 150 micrometer


 

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  • color slide (CS Kuoh)
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