288 PATAGONIAN EXPEDITIONS I BOTANY. 



S. Patagon., in hills along Carren-leofu, and by Rio Sta. Cruz. 

 Rhizome deep, often sending up numerous branches ; each culm bear- 

 ing about 20 leaves, about 3-9 cm. long. 



38. C. TRICHODES Steud. 



Stigmas 2, exsert. Culms many, erect, 10-15 cm - high, capillary-seta- 

 ceous, compressed-triangular, few-leaved above the base. Leaves flexu- 

 ose, setaceous, slightly longer than the culm, obtuse, serrulate. Spikes 

 ellipsoid, 4 by 3 mm., becoming subglobular, few-flowered. Scales 3- 

 nerved, keel green, sides brown; the upper acuminate-mucronate, the 

 3-2 lowest leafy, cusped. Utricles exceeding the scale, compressed, bi- 

 convex, their rostrum scabrid, their mouth 2-toothed. 



(Chili) ; S. Fuegia, about Ushuaia. 



39. C. TRIFIDA Cav. 



Style 3-cleft. Culm 60-90 cm. tall, robust, trigonal, erect, its apex 

 smooth. Spikes 6-8, erect, approximate, cylindric-ventricose ; the 3 up- 

 permost male, sessile ; the others female ; the lowest stalked. The lowest 

 bract leafy, scabrid, exceeding the culm. Scales linear, brown-rusty, their 

 keel white, 3-nerved irregularly emarginate. Utricles obovate, abruptly 

 terminated by a cylindrical 2-cusped rostrum, with a white awn ; attenu- 

 ate at base. 



(New Zeal. ; Antipodes ; Auckland and Chatham Is.) ; Magellan. Cape 

 Tres Montes; Falklands; Fuegia (Hariot). 



"A noble species, growing with and emulating the young tussock- 

 grass." That found in Fuegia has the awn on the scale short, and the 

 scale itself not bilobed. 



C. TRIFIDA FRANCHETII Kurtz. 



Differs from the typical species by having the spikes once or twice 

 smaller, the awns much smaller; the utricle membranaceous, whitish, 

 more or less purple-marked ; uppermost spike often apically female. 



Fuegia, subalpine by Rio Grande on Beagle Channel. 



40. C. UROLEPIS Franchet. 



Style 2-cleft. Culm a meter or more high, robust, trigonal, two sides 

 concave, the angles scabrid. Leaves very long, to 10 mm. broad, rough- 



