Scleria purpurascens Steud.

• Authority

  Koyama, Tetsuo M. 1967. The systematic significance of leaf structure in the tribe Sclerieae (Cyperaceae). Mem. New York Bot. Gard. 16: 46-70.

• Family

  Cyperaceae

• Scientific Name

  Scleria purpurascens Steud.

• Description

  
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  Species Description - Leaf blades inversely W-shaped. Inflated epidermal cells at median adaxial groove longitudinally rectangular, frequently subjoined by small translucent cells. Cells of the rest of adaxial epidermis nearly square, taller than those of abaxial epidermis. Vascular bundles of varying sizes arranged in a single row in abaxial spongy mesophyll; bundle sheaths double, the inner bundle sheath consisting of lignified small cells complete, the outer bundle sheath with thin-walled cells interrupted abaxially by sclerenchyma, the component cells approximately the same size as those of the inner sheath. Large vascular bundles supported by an abaxial girder and an adaxial fiber strand. Mesophyll with scattered tannin cells, indistinctly differentiated into palisade and spongy portions; palisade chloren-chyma 1- (and in part 2-) layered, with longitudinally rectangular cells; spongy portion relatively crowded with lobed cells. No large intercellular spaces developing.

• Discussion

  Note. The multilayered swollen epidermal tissue at the adaxial median costa seen in this species and S. cyperina is rather an unusual occurrence in the tribe Sclerieae.