2l6 PATAGONIAN EXPEDITIONS I BOTANY. 



or in pairs. Spikelets elliptic-linear, large, 8-5o-flowered ; the flowers 

 broad-ovate, mostly mucronulate. (Leaf-nerves with glands which emit. 

 an offensive odor.) 



(Cosmopolitan) ; a dwarf form in N. Patagon. 



45. KOELERIA Pers. 



Cespitose, with contracted panicles. Spikelets mostly 2-5-flowered. 

 The two lower empty glumes keeled, acute or short-awned, scarious-mar- 

 gined ; floral glumes similar but more scarious ; the upper glumes grad- 

 ually smaller, 3-5-nerved. 



Species 15, dispersed over temperate regions; several species in Chili 

 and Argent. Distinguished chiefly by more scarious glumes and fainter 

 nerves than of their allies. 



1. K. PHLEOIDES Pers. 



Culm ascending, geniculate, 7-30 cm. high. Leaves plane, narrow, 

 linear, hairy ; ligule white-scarious, partly exsert, lacerous. Panicle dense, 

 cylindrical, spike-like ; Spikelets 2-8-flowered. Glumes unequal, shorter 

 than the flowers. Floriglume dorsally scabrous, subapically awned ; the 

 awn exceeding the flower. Annual. 



N. Patagon., roadsides near Carmen. 



2. K. STERILIS Steud. 



. Culms 5-15 cm. high, with the leaves fasciculately crowded, having 

 basal sheaths. Leaves glabrous, linear, nearly as long as the culms, the 

 margin inflected; the ligules oblong, exsert. Spike terminal, solitary; 

 the rays with 2-6 spikelets, which are lanceolate, 3-4-flowered. Glumes 

 subequal, nearly as long as the flowers, white hyaline on margin and apex. 



Patagon. 



46. CATABROSA Beauv. Whorl-grass. 



Creeping perennial aquatic, with soft flat leaves and open panicle. 

 Spikelets 2-flowered, the two empty glumes nearly nerveless, shorter than 

 the awnless, erose-truncate floral-glume ; palea barely shorter. 



Species i, viz. : 



C. AQUATICA Beauv. 



Culm 1 0-60 cm. tall, stout. Spikelets 3 mm. long, the second empty 

 glume exceeding the first. (Brit. & Br. i, 194. In cold parts of Eurasia 

 and N. Amer.) E. Fuegia. 



