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Taiwan Gramineae | Family List | Poaceae | Zea

Zea mays L., Sp. Pl. 2: 971. 1753. Hsu, Fl. Taiwan 5: 705. 1978; Koyama, Grass. Jap. Neighb. Reg. 480. 1987.


Zea mays

Annual; culm solid. Spikelets unisexual. Staminate spikelets in pairs, about 9 mm long; lower glume lanceolate, pubescent, keeled, long-ciliate, margin thinner, 9-11-nerved, as Iong as the spikelet; upper glume oblong-lanceolate, 7- nerved, nearly as long as the lower; lower lemma minutely hairy on the back and margins, 3-nerved, about 8 mm long; palea as long as the lemma; upper lemma smaller than the lower palea, cleft usually to the base; anthers 3, about 6 mm long. Pistillate inflorescence axillary, the spikelets in many rows on a thickened, almost woody axis, enclosed by numerous large foliaceous bracts or spathes, the tyles extremely long, like silky threads. Caryopsis greatly exceeding the glumes at maturity.

TAIPEI: NTU Gardens Kao 3489. PENGHU: Hongkuang, Hsu 11559.

A native of America but now cultivated in all warm countries throughout the world.

Maize (corn) is a very important food for livestock as well as for man. The grain is ground into flour or cooked without grinding; small green corn (unripe cobs) forms a favorite vegetable; the dry cobs are used as fuel and the spathes are used for making paper.

midrib 中肋: (la)large:several vascular bundles

leaf surface 表面: (fla)flat surface

sclerenchyma 厚壁組織: (noscl)no except large 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: (lareg)bulliform set olive-shaped sometimes
with colorless cells

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: 142 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 2


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