26 



*Ehrharta villosa, Schult. f., var. maxima, Stapf. Sand 

 dunes south of Glenelg (S. Dixon); Clarendon; Streaky Bay, 

 E.P. (per H. W. Andrew). A valuable sand-binding grass; 

 flowers October-November. Introduced to the State in recent 

 years, and has established itself in several places. The 

 identification was confirmed by the Kew authorities. A native 

 of South Africa. 



South Australian Species of Calamagrostis. 



Panicle loose; bristle present. 



Flowering glume hairy, half as long as the 

 outer glumes ; awn attached near middle of 



flowering glume C. aemula 



Flowering and outer glumes longer, the flower- 

 ing glume glabrous; awn attached below 



middle; maritime grass var. Billardieri 



Panicle dense or slightly lobed ; flowering glume 

 nearly as long as outer glumes. 

 Awn almost basal. 



Bristle absent C. quadriseta 



Bristle present var. montana 



Awn attached near middle of flowering 

 glume. 



Bristle absent ,. ... C. minor 



Bristle present var. densa 



The arguments for uniting Deyeuxia with Calamagrostis 

 are fortified by the character of our Australian species. These 

 are all distinguished from Agrostis by the conspicuous tuft of 

 hairs on the callus of the flowering glume (rhachilla, or axis of 

 the spikelet), but some of them have a hairy bristle (pedicel 

 of an obsolete second flower) rising at the base of the palea 

 and continuing the rhachilla (Deyeuxia), while others have 

 no such bristle (Calamagrostis). The remaining differences, 

 however, are not such as would justify a classification under 

 distinct genera, or even, in many instances, under distinct 

 species. In our plants the other differences appear to me to be 

 sometimes so slight as to be merely varietal. 



Calamagrostis quadriseta, (Labill.) Spreng. (Deyeuxia 

 quadriseta, Benth.) Mount Lofty; Aldgate; Belair; Bridge- 

 water; Clarendon; Myponga; Cygnet River, K.I. ; Wilpena 

 Pound (the last two from the Tate Herbarium). Grass 

 50-120 cm. high; panicle 5-13 cm. long, compact but usually 

 somewhat lobed; outer glumes keeled, subequal, 3J-5 mm. 

 long; flowering glume 2J-4 mm. long, 4-toothed, narrow, 

 minutely scabrous; awn almost basal, usually shortly exserted, 

 but sometimes included ; tuft of hairs more or less surrounding 

 the callus; grain fusiform, 2 mm. long, the membranous 

 pericarp loose toward the summit; hilum shortly linear. 



Var. montana, Ewart. (Deyeuxia montana, Benth.) I 

 have only inserted this variety because Bentham gives it for 



