422 Transactions. — Botany. 



* Spikelets usually more or less distant, or the upper ones alone 



approximate (often all approximate in 19. 0. raoulii). 

 Leaves semi-terete, usually red ; glumes pale, almost white ; 



perigynia plano-convex, smooth, margins serrate .. 16. C. buchanani. 



Leaves narrow, flat, keeled ; spikelets slender, loose-flowered ; 

 glumes acute, cuspidate or awned ; perigynia turgid, 

 smooth, polished, margins entire . . .. .. ..17. C. hicida. 



Leaves narrow, flat, keeled ; spikelets stout, close-flowered ; 

 terminal one sometimes partly female ; glumes rounded, 

 obtuse ; perigynia divaricating, unequally biconvex, 



smooth, with serrate margins 18. C. dipsacea. 



Leaves broad, flat, not keeled ; terminal spikelet almost in- 

 variably partly female ; glumes bifid, awned ; perigynia 

 strongly nerved, with serrate margins . . . . . . 19. G. raoulii. 



Leaves short, flat, keeled, coriaceous ; male spikelet stout ; 

 perigjTiia dark coloured, almost black, biconvex, nerved 



and wrinkled, margins entire 20. G.devia. 



** Spikelets usually approximate (sometimes distant in 21. C. testacca) 

 Culms slender, fiiliform, 1 to 2 feet, often much elongated in 



fruit ; perigynia plano-convex . . . . . . . . 21. C. testacca. 



Culms rather stout, 4 to 12 inches high, shorter than the 



leaves; perigynia unequally biconvex .. .. ..22. C.wakatipu. 



Culms very short, stout, 1 to 4 inches ; spikelets concealed 

 by the leaves ; perigynia plano-convex, slightly nerved. 

 Leaves often spirally twisted at the apex when dry . . 23. G. cirrhosa. 

 C. Stigmas 3. Female spikelets either wholly unisexual, or with a few 

 male flowers at the base or apex of the spikelet. 

 * Perigynia quite glabrous, hardly spreading when ripe, beak short, 



stout, 

 t Small, 2 to 6 inches high. Culms extremely short, so that the 



spikelets are hidden among the leaves. 

 Short, stout, densely tufted; leaves flat, grooved; glumes 

 broad-ovate or rounded; perigynia broadly ovate, turgid, 



unequally biconvex, serrate above 24. G. cryptocarpa. 



Small, slender ; culms tufted but spreading ; leaves narrow, 

 concave ; glumes narrow-ovate ; perigynia elliptic- 

 oblong, trigonous or fusiform . . . . . . . . 25. C. uncifolia. 



tf Slender, 6-18 inches high; leaves narrow, ^j~^ inch, usually 



plano-convex ; male spikelets solitary. 

 Culms slender, flaccid ; leaves longer than the culms, fili- 

 form, keeled ; spikelets all sheathed, lowest one basal ; 

 perigynia trigonous . . . . . . . . . . . . 26. G. pulchella. 



Stouter, leaves with broad sheathing bases and fine often 

 curled and twisted points; spikelets all sheathed and 

 stalked ; glumes pale ; perigynia dark, smooth and turgid 27. G. petriei. 

 Culms filiform, shorter than the leaves ; spikelets short, 

 sessile or the lowest shortly pedunculate, perigynia lan- 

 ceolate, plano-convex, margins serrate . . . . . . 28. C. comans. 



