72 PATAGONIAN EXPEDITIONS : BOTANY. 



Subsect. of 19. PauciflorcE. Spikelets lax, few-flowered. Utricles short-stiped, at length 

 reflexed. Utricles trigonal-lanceolate. Stigmas 3. microglochin,var.oligandra,No.2i. 

 Subgenus II. Vignea. Stigmas 2. 



Sect. Incuroce. Rhizome long-creeping. Spikelets few, crowded; utricle inflated, 3 mm. 



long. Magellan, Sandy Point, and cosmopolitan. incurva, No. 22. 



Sect. Ftttidce. Spikelets several, crowded in an ovate head; utricles plano-convex, mem- 



branaceous, obsoletely nervose. nebularum, var. Kurtziana, No. 23. 



Sect. Divisce. Rhizome thick; spike subdense, lobed. Utricles dorsally nerved, rostrum 



cleft anteriorly; stigmas 2. Gayana, marcida, macrorrhiza, No. 24. 



Sect. Bracteosce. Rhizome subrepent, with short internodes. Spikelets ovate, androgynous, 



not numerous; the lower with 1-3 long bracts. Utricles becoming squarrose, spongy, and 



having a broad rostrum. Style basally thick; stigmas 2. bonariensis, sororia, No. 25. 



Sect. Ovales. Rhizome caespitose. Spikelets several, crowded, gynandrous. Scales colored; 



utricles broad, concave-convex, very shortly stiped. madoviana, No. 26. 



Subgen. III. Indocarex. All are tropical ; and unknown in the Patagonian Flora. No. 15. 



Subgenus IV. Eucarex, No. 16, 



Section Acute. Spikelets dense, bracts not sheathing. Utricle plane-convex, or biconvex. 



Stigmas 2. No. 27. 



Subsect. Vulgares. Culms rather slender; leaves long-acuminate, flaccid; bracts leaflike; 



exceeding the inflorescence. Utricles nervose, not turgid, decidua, Goodenoughii, No. 28. 



Subsect. Cryptocarpa. Aphyllopod; rhizome stoloniferous. Culms stout, triquetrous: 



the sheaths leafless, reticulately cleft. Leaf-margins revolute. Spikelets pendulous. 



Female scales dorsally 3-nerved. Nut constricted. Stigmas 2. 



Darwinii, var. Serranoi, var. molepis, No. 29. 



Sect. Atratae. Female spikelets subsessile, the terminal gynecandrous. Scales black-fuscous. 

 Utricles trigonal, glabrous. Style not thick, stigmas 2. atropicta, No. 30. 



Sect. Limosa. Female spikelets sub-dense-flowered, pendulous. The scales cupreous; the 

 bracts briefly sheathing. Style exsert, its base equal; stigmas 3. Nut enclosed. Pata- 

 gonia; Magellan; Fuegia; Falklands; also in Eurasia, and N. America. 



Andersonii, No. 31. 



Sect. Frigidce. Utricles more or less rostrate; often 2-toothed; leaves never septate-nodose. 

 Female scales dark-purple to fuscous. Stigmas 3. No. 32. 



Subsect. Fuliginosa. Stigmas 3 ; bracts sheathing. Lateral spikelets female, not numer- 

 ous. Leaves broad. Terminal spikelet often gynecandrous. Female scales dark- 

 fuscous. Utricles glabrous, nerveless. Culms firm, cernuous apically. Banksii, No. 33 ; 

 Sect. Spirostachyce. Utricles membranaceous, with rostrum very 2-toothed. Culms central, 

 bracts long-laminate. Style-base equal, deciduous, slender. Leaves narrow; lateral spike- 

 lets scarcely over 2 cm. long, oblong-cylindric. Utricles obliquely open, rostrum briefly 

 2-toothed. fuscula, acaulis, oederi, No. 34. 



Sect. Pseudocypereee. Leaves septate-nodose. Utricles glabrous, membranaceous, long-ros- 

 trate : obtusely trigonal, scarcely inflated. Style slender; stigmas 3. pseudo-cyperus, No. 35. 

 Sect. Physocarpa. Leaves septate-nodose. Utricules glabrous; obtusely trigonal, scarcely 

 inflated, long-rostrate, membranaceous. Style slender, stigmas 3, short. No. 36. 



Subsect. LupuUnce. Style-base thickened. Utricles subcoriaceous, 10-1 8 mm. long, many- 

 ribbed, attenuate rostrum to a long tip. macrosolen, Dusenii, No. 37. 



