48 
f. Tall, slender; leaves involute, 1—3 mm. broad; the stalk of the lowest 
spikelet ‘short; mostly, 3\istigmas, ....0:.....- C. rotundata (150). 
** Utricles not shining, nearly beak-less. 
a, Czspitose; aphyllopode (leaf-less sheaths between the green leaves and 
the leaves from foregoing year). 
+ Slender; sheaths red-brown, shining; utricles nerveless 
C. caespitosa (124). 
+7 Tall, robust; sheaths straw-coloured, fibrillose; utricles nerved 
C. stricta (125). 
8. Stoloniferous, creeping; phyllopode (no leaf-less sheaths intermixed), 
+ Leaves with involute margins. 
° Small littoral species; female spikelets few-flowered, erect, scales 
light brown, obtuse or acute . . C. salina vy. subspathacea (129). 
°° Rather tall; female spikelets many- and dense-flowered, erect, 
scales dark with light midvein. 
§ Glaucous: lowest bract not large, mostly not exceeding the 
culm; spikelets short cylindrical .... . C. Goodenovii (127). 
§§ Bright green; lowest bract large, broad, exceeding the culm; 
spikelets very long, cylindrical, dense-flowered C. aquatilis (126). 
+r Leaves flat. 
° Seales light-brown, mostly acute or acuminate; spikelets rather 
few- and lax-flowered, attenuated at the summit C. salina (129). 
°° Scales dark-brown, obtuse; spikelets cylindrical, dense-flowered 
C. aquatilis v. stans (126). 
77? Leaves revolute. 
° Low; one male spikelet, scales obtuse, dark, spikelets erect, 
SHOPE vacsand aha Rea ee ets ee Sees ee eas C. rigida (131). 
° Tall; 1—4 male spikelets; scales acute or elongated. 
§ Scales elongated, awned, light-brown . . C. cryptocarpa (130). 
§§ Scales acute, but mostly not elongated, dark with light 
Midyelint, Prius sci eyi eit) mete crete temas ae) Lote he C. gracilis (128). 
Subgenus A. VIGNEA Beauy. Spikelets sessile, androgynous, 
male at the summit or base, seldom male and female flowers va- 
riously intermixed. Stigmas 2. 
Sect. I. Capituligerae Kikenth., Engl. Bot. Jahrb., 37, 1900, p. 495. 
Spike terminal, solitary or more spikelets densely aggregated in a glo- 
bose or ovate head; utricles not winged; male flowers at the summit. 
Subsect. 1. Nardinae Tuckerm., Enum. method. p.7. Rhizome ce- 
spitose; small species with terminal, solitary, few-flowered spike; utricles 
membranous; a rudiment of the axis at the base of the achene. 
98. C. nardina Fr. 
Taylor, Pl. coll. at Davis Str. and Baff. Bay p. 85; Greely, Lady 
Frankl. Bay Exp. p.15; Peary, Auxil. Exp., App. C. p.7; Hart, Brit. Pol. 
Exped. p. 240; Lge. Consp. Fl. Groenl. p.131 and p. 287; Roseny., Till. 
p. 717; Hartz, Nordést Grénl. p. 345; Dusén, Ost-Grénl. p. 55; Nath., 
Spetsb. Karly. p. 36; Fl. D. tab. 2365; C. Hepburnii Boot in Hook. FI. bor. 
Am. II p. 209, tab. 207. 
