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Taiwan Gramineae | Family List | Poaceae | Avena

Avena sativa L., Sp. Pl. 79. 1753. Hsu, Fl. Taiwan 5: 408. 1978; Koyama, Grass. Jap. Neighb. Reg. 146. 1987.


Avena sativa
leaf cross section

Credit: cs kuoh

Culms 40-80 cm tall. Blades linear, 8-20 cm long by 4-15 mm wide; ligule chartceous, tongue-shaped, minutely hispid on backside, 2-3 mm long. Panicle open, usually no branch developing, about 10-20 cm long. Spikelets nodding, 1-2-florets, persistent , not falling off when mature, 2-2.5 cm long; glumes subequal, chartaceous, margin hyaline, rounded on the backside, 7-11-nerved, sometimes connected with tessellate nerves; lemma stiff, hairy on the lower half, 7-9-nerved, awnless or with a long straight awn arising from the backside; palea shorter than the lemma, minutely hairy on the two keels. Caryopsis hairy; tightly enclosed between the lemma and palea, hilum linear.

TAIPEI: Taipei NTU Farm, Kao s. n. June 29, 1957.

Widely cultivated in non-tropical regions of both hemispheres for food and fodders.

midrib 中肋: (sm)small:with one vascular bundle

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: (palis)differentiate to palisade and
sponge tissue

bundle sheath 維管束鞘: (nks)bundle sheaths with
small amount of 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: (fanfu)bulliform set fan shaped,
cells similar in size

chlorenchyma cell number between two adjacent veins: 7

chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (lit)with a little of chloroplast

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

distance between two adjancent vein 脈間距: 437 micrometer

length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 4

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


Related Objects Image Gallery 
  • leaf cross section (cs kuoh)
  • Image/JPEG
  • specimen (cs kuoh)
  • Image/JPEG
  • Image/GIF (CC Hsu, Taiwan Grasses)
  • Image/GIF
  • Image/GIF (CC Hsu, 1975 Taiwan Grasses)
  • Image/GIF

    Flora of China  
  • Illustration
  • Illustration

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