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Electronic Flora of South Australia genus Fact Sheet

Family: Poaceae
Aira

Citation: L., Sp. Pl. 63 (1753).

Derivation: Greek name for Loliurn temulentum.

Synonymy: Not Applicable

Common name: Silvery hair-grasses.

Description:
Largely glabrous annual herbs; leaves short, narrow, often convolute; ligule lanceolate, glabrous.

Inflorescence a compound panicle; spikelets pedicellate, 2-flowered, the rhachilla not continued; glumes 2, subequal, as long as or longer than the spikelet, persistent, membranous, keeled, 1-3-nerved; lemmas subterete, acuminate, 2-fid, hyaline, with a fine dorsal geniculate awn from below the middle or awn 0; callus very short, bearded.

Distribution:  12 species from Europe, Asia and Africa. Key and descriptions largely from Turin (1980) Flora Europaea 5:227-228, although they do not always enable satisfactory identification of S.Aust. material.

Biology: No text

Key to Species:
1. Pedicels 2-5 times as long as the spikelets
A. elegantissima 3.
1. Pedicels up to twice as long as the spikelets
 
2. Glumes acuminate; pedicels gradually thickened at the apex
A. caryophyllea 1.
2. Glumes subobtuse; pedicels abruptly thickened at the apex
A. cupaniana 2.

Author: Not yet available


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