276 PATAGONIAN EXPEDITIONS : BOTANY. 



Sheaths leafless. Spicate glomerules. (34) C. schedonautos. 



41. Bracts shorter than culm. Spikes few, oblong-cylindrical, or short. Utricles subsessile, 



nerveless. Achene nearly filling the utricle. C. vulgaris Fr. 



Bracts longer than culm. Spikes many, cylindraceous. Scales soon deciduous. Utricles 



stiped, nervose. Achenes scarcely filling two thirds the utricle. (12) C. decidua Bt. 



42. Spikes approximate, only the lower stalked. Scales scarcely elongate. Utricles many- 



nerved. (2) C. andersoni Bt. 



Spikes remote, numerous, all stalked. Scales elongate. Utricles granulose-punctate, few- 

 nerved. ( 1 1 ) C. darwinii Bt. 



43. Culm low, concealed in the leaves. Female spikes oblong, lax. Rostrum short, often 



recurved. C. brachycalama Gris. 



Culm medium, leaves as long. Lower spikes nodding. Utricles elliptical. ( 1 9) C. germana. 

 Culm exceeding the leaves. Male spike i, female spikes about 4, little remote. Utricles 



ovate-oblong. (17) (indecora) C.fuscula. 



Culm tall, free. Spikes distant. Utricles compressed-triquetrous. 44. 



44. Culm acute- angled, rough upwards. Female spikes long- stalked, lax, nodding ; only I 



terminal male. Utricle glabrous, grayish. (27) C. magellanica Lam. 



Culm obtuse-angled, smooth. Female spikes short-stalked, erect. Terminal males 4. 



Utricle straw-purple, striolate, spinulose-margined. C. hispida Sch. 



45. (From 38.) Utricles very rostrate, 2- toothed. 



Legs of rostrum directly prostrate. Leaves not s eptate-nodose. 46. 



Legs of rostrum divergent. Leaves septate-nodose. 5 1 . 



46. Culm very short, hid among leaves. Female spikes sessile, crowded. Utricle compressed. 



Stigmas 2. (i) C. acaulis d'Urv. 



Culm tall (about i meter). Root creeping. 



Culm acute-angled, smooth. Male spikes 3 ; female spikes 3, distant, nutant. Utricles 



compressed. (32) C. pseudocyperus L. 



Culm acute-angled, rough. Male spikes 3-5 ; female spikes 3-5, some apically male. 



Utricle ovate-conical. (33) C. riparia Curt. 



Culm unknown. Male spikes 2 ; female spikes 5, some apically male. Bracts very long. 



(35) C. serranoi Phil. 

 Culm free. Stigmas 3. 47- 



47. Scales blackish. Utricles 5-7 mm., compressed. Rostrum slender, purple. Terminal 



spike sometimes female at apex. (5) C. banksii Bt. 



Scales rusty. Utricles shorter, subinflated, trigonal. 48. 



48. Spike long-cylindrical, dense, more or less pedunculated, often at length nodding. Utricle 



small. 49- 



Spike oval or oblong, subsessile, erect, dense. Utricle larger. 50. 



49. Leaves 2, nerved above. Utricle compressed-trigonal, olive-colored, not shining. 



C. falcata Bt. 

 Leaves 3~4-nerved. Utricle inflated-trigonal, brown-olive, shining, stiped. 



C. lamprocarpa Ph. 



50. Scales more or less awned. Utricle greenish-yellow, purple-striolate, with 2 lateral nerves. 



(21) C. inconspicua Steud. 

 Scales obtusish. Utricle very and equally nervose. C. flava brevirostrata Kk. 



5 1 . Rostral lobes divergent. 



