MACLOSKIE: GRAMINE/E. 273 



the scales, 7 mm. long, elliptical-trigonal, greenish, obsoletely nervous, 

 with short rostrum. Achene oblong. Awn glabrous, twice as long as 

 the utricle. 



W. Fuegia; Beagle Channel, by Rio Olivaia. 



9. CAREX Linn. Sedge. 



Grass-like herbs, usually with trigonal culms, sheathed by the closed 

 base of the 3-ranked leaves. Flowers monoecious or dioecious, solitary in 

 the axils of scales, without true perianth, forming spikes which are sub- 

 tended by the upper leaves, and are wholly male, or wholly female, or 

 with the flowers androgynously mixed in the same spike. Stamens 3, 

 rarely fewer. Style-branches 2 or 3. Achenes trigonal or lenticular, en- 

 closed in a utricle. 



Species more than 1,000, cosmopolitan, most abundant in temperate 

 zones, often cespitose and forming tussocks in marshy places. 



CAREX ANALYSIS, FOR SPECIES OF SOUTH AMERICA. 



(Based on Kiikenthal in Engler's Bot. Jahrb. xxvii, 558.) The species reported from Patagonia 



have their numerical position prefixed. 



1. Spike i, androgynous. 2. 

 Spike i, subglobose, male above, female below, with long bracts. Leaves filiform, half as 



long as the culm. (28) C. ortega. 



Spikes numerous. 12. 



2. Spike directly terminal. Stigmas 2-3. 3. 

 Pseudolateral. Stigmas 3. 6. 



3. Stigmas 3. Spikes 5-6-flowered. Utricle terete, subulate. Achene with an exsert seta. 



(Sub Uncinia, p. 271) C. microglochin fuegiana. 

 Stigmas 2. Utricle plano-convex. 4. 



4. Rhizome creeping. Spike few-flowered ; scales acute. C. trichodes. 

 Rhizome deep, sending up many low, angulate-terete, sulcate culms. Dioecious, male spike 



solitary, female spikes few. Utricle convex-concave with long rostrum. 



(37) C. subantarctica. 

 Rhizomes cespitose. Spike many-flowered, obtuse. 5. 



5. Scales round, persistent. Utricle broad. C. capitata. 

 Scales ovate, caducous. C. caduca. 



6. Spike i, pseudolateral. Stigmas 3. 



Culm low, leafy. Rostrum long. C. vallis-pulchra Phil. 



Culm taller. Fruit suberostrate. 7. 



7. Culm triquetrous, weak. Leaves plane. Utricle winged. C. selloiviana. 

 Culm subterete, smooth. Leaves not plane, few. Utricle not winged. 8. 



8. Culm thick, leafless. o. 

 Culm slender, leafy. IO . 



