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Taiwan Gramineae | Family List | Poaceae | Panicum

Panicum paludosum Roxb., Fl. Ind. 1: 310. 1820; Hsu, Fl. Taiwan 5: 576. 1978.


Panicum paludosum

Credit: cs kuoh

Aquatic perennials; culm decumbent and rooting at base, upper parts floating on water, soft, often 1 cm in diam., flowering culm as much as 1 m tall. Blade 10-30 cm long, 8-16 mm wide; sheath glabrous, longer than internode; ligule a ring of hairs, ca. 2 mm long. Panicle open, partially included in upper most sheath, 15-30 cm long, spikelets oblong-lanceolate, ca. 4 mm long, acuminate; lower glume hyaline, acute to truncate, ca. 1 mm long, veins obscure; upper glume and lower lemma equal or subequal, 7-9-veined; lower lemma enclosing a hyaline lower palea of ca. 2/3 length of lower lemma; upper lemma ca. 2.5 mm long, smooth and shiny, indurate, pale at maturity.

ILAN: Chiaochi, Hsu 831. TAIPEI: Chinshan, Hsu 1302; Kankou, Hsu 653. HSINCHU: Nanliao, Chuang 2548. TAICHUNG: Tachia, Asikaga 7076. NANTOU: Puli, Hsu 1377. YUNLIN: Mailiao, Suzuki 6608. TAINAN: Hsinhua, Hsu 715. PINGTUNG: Hengchun, Hsu 506.

Tropical Asia and Australia. Taiwan, in shallow water on margins of ponds.

leaf surface 表面: (nod)nodules on both surfaces

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


Related Objects  
  • drawing (cs kuoh)
  • Image/JPEG

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