190 FLORA. 



B. Perigynia short-beaked or beakless, little or not at all inflated, 1-5 mm. long, the 

 beak commonly not more than one-half as long as the body (long-beaked in Nos. 43, 82, 

 83, 96); spikes small and oblong or globose; or elongated, linear or narrowly cylindric. 

 Nos. 36-142. 



Spikes 2 or more, the staminate one always uppermost, sometimes partly pistillate. (No. 

 140 may be looked for here.) Nos. 36-132. 

 Pistillate spike or spikes many-flowered, mostly 2.5 cm. long or more (or shorter in 

 Nos. 44, 48, 53-55, 61, 63-65, 73, 75, 76, 85, 89-92), linear, narrowly cylindric 

 or oblong. Nos. 36-92. 

 Perigynia with a straight short beak (long-beaked in No. 43; nearly beakless in 

 No. 36), firm or leathery in texture; pistillate spikes erect (or nodding in No. 

 37) ; stigmas 3. Nos. 36-43. [p. 197.] 

 Perigynia beakless or very short-beaked (see No. 36), and with orifices nearly or 

 quite entire, thin in texture, not inflated, closely investing the achene; 

 pistillate spikes erect or drooping, often brown or purple; stigmas often 2. 

 Nos. 44-72. 

 Pistillate spikes erect or somewhat spreading (drooping when mature in No. 



45). Nos. 44-58. [p. 199.] 

 Pistillate spikes drooping, mostly on slender or filiform stalks (erect in Nos. 

 66 and 71). Nos. 59-72. [p. 201.] 

 Perigynia tapering to a distinct beak (nearly or quite beakless in Nos. 73-77), 

 membranous in texture (firm in No. 88), inflated or loosely investing the 

 achene; pistillate spikes mostly drooping, often narrowly linear. Nos. 

 73-92. 

 Terminal spike staminate below, pistillate above; beak of the perigynium 

 short or none. Nos. 73-81. 



Spikes all erect or nearly so. Nos. 73-76. Virescentes. [p. 204.] 

 Pistillate spikes drooping or spreading (erect or little spreading in 

 No. 78). Nos. 77-81. Gracillimae. [p. 205.] 

 Terminal spike entirely staminate, or sometimes pistillate at the base. Nos. 

 82-92. [p. 206.] (See No. 140.) 

 Pistillate spikes small, few-many-flowered, mostly 6-25 mm. long (sometimes longer 

 in Nos. 103, 104, 116). Nos. 93-132. (See also Nos. 44, 48, 53-55, 61, 63-05, 

 68, 73, 75, 80, 84, 85 and 89-92.) 

 Perigynia glabrous. Nos. 93-120. [p. 208.] (See No. 123.) 



Pistillate spikes many-flowered, 6-25 mm. long, usually dense. Nos. 93-99. 

 Pistillate spikes few-several-flowered, often loose. Nos. 100-120; 136-138. 

 Perigynia more or less pubescent (becoming glabrous in No. 123). Nos. 121- 

 132. [p. 213.] 

 Spike solitary (except in No. 140), sometimes dioecious. Nos. 133-142. [p. 215.] 



II. Staminate flowers few, at the summits or bases of the always sessile spil.es, or 

 sometimes forming whole spikes, or variously intermixed with the pistillate: stigmas 

 always 2; achene lenticular, compressed, ellipsoid or plano-convex. Nos. 143-205. 

 VIGNEA. 



Staminate flowers at the summits of the spikes. Nos. 143-173. 



Spike solitary, terminal, mostly brown, plants often dioecious. Nos. 143-146. 



Dioicae. [p. 217.] 

 Spikes several or many, clustered, separated or sometimes panicled. Nos. 147-151. 

 Spikes densely aggregated into a globose or ovoid head, often appearing like a 



solitary terminal spike. Nos. 147-151 [p. 218.] 

 Clusters of spikes looser, often compound or the spikes distinctly separated (more 

 or less aggregated in Nos. 170-173). Nos. 152-173. 

 Spikes yellowish or brown at maturity, often in compound or panicled clus- 

 ters. Nos. 152-163. [p. 218.J 

 Spikes green or greenish when mature, aggregated or separated, in simple 

 clusters. Nos. 164-173. MOHLENBERGIANAE. [p. 220.] 

 Staminate flowers variously mingled with the pistillate in the spikes or occasionally 

 forming whole spikes. (See Nos. 143-146.) 

 Perigynia radiately spreading or reflexed. 174. C. ste?ilis. 



Perigynia erect or appressed. 



Perigynia wingless, the inner face flat. 187. C. bromoides. 



Perigynia winged, the inn< r 1 * concave. 190. C. siccata. 



Staminate flowers at the bases of the spikes. Nos. 174-205. 



Perigynia without a marginal wing. Nos. 174—187, Elongatae. [p. 222.] 

 Perigynia with a narrow or broad marginal wing. Nos. 1S8-205. Ovales. [p. 225.] 



1. Carex pauciflora T.ightf. FEW-FLOWERED SEDGE. (I. F. f. 671.) Glabrous; 

 culms slender, 0.7-5 & aL n *gh- Leaves very narrow, shorter than the culm, spike 



