138 PROCEEDINGS OP THE AMERICAN ACADEMY 



244. Carex Potosina, Hemsley, Biol. Cent-Am. iii. 474. 



G. Schaff fieri, W. Boott, Proc. Am. Acad, xviii. 172, not Boeckl. 



C. fuscolutea, Boeckeler, Engler's Bot. Jahr. vii. part iii. 278. 

 " Rootstock creeping, branching, clothed with imbricated brown 

 scales that become fibrous: culm about a foot high, slender, scabrous 

 above on the sharp angles : leaves about equalling the culm, one line 

 broad, attenuated into a long and filiform extremity, flat or condupli- 

 cate above : head about an inch long, of three or more oblong sessile 

 clusters of lanceolate androgynous spikes, the upper clusters crowded, 

 the lowest distinct and rarely borne on a long radical peduncle : spikes 

 five or six lines long, staminate above: bracts filiform from an ovate 

 several-nerved green-keeled hyaline-margined clasping base, the lowest 

 much longer than the head, the next one or two often exceeding it : 

 scales hyaline, pale chestnut-colored with a green keel, ovate, acute or 

 roughly awn-pointed, exceeding the perigynia which are pale brown, 

 ovate or lanceolate (two lines long), tapering at the base, covered with 

 irregular yellowish somewhat scurfy tubercles, obliquely cut at the tojj 

 and ending in two long subulate rough teeth, serrate on the green mar- 

 gins." — San Luis Potosi, Northern Mexico, Schaffner 546, 221. 



245. Carex Douglasii, Boott, Hook. FI. Bor.-Am. ii. 213, t. 214. 

 C. Nuttallii, Dewey, Sill. Journ. xliii. 92. 



C. Meekii, Dewey, 1. c. 2d ser. xxiv. 48. 

 G. Douglasii, var minor, Olney, Bot. King's Rep. 363. 

 G. Fendleriana, Boeckeler, Linnaja, xxxix. 135. 

 A singular plant, of which mature perigynia are rarely if ever seen. 

 Wyoming to New Mexico, California, and Oregon. 

 Var. BRUNNEA, Olney, Bot. King's Rep. 363. 



Carson City, Nevada, Watson 1226; California, Bolander 4549 and 

 4550. 



246. Garex arenaria, Linn. Sp. PI. 973. 



Extensively creeping: culm about a foot high, scabrous on the angles 

 above : spikes rather numerous, those at the apex of the head stami- 

 nate, the intermediate ones staminate at the summit, the lowest pistil- 

 late : perigynium ovate-oblong or ovate-lanceolate, the ujiper half 

 produced into a conspicuous serrate wing-border, nerved, the beak 

 sharjjly bifid. — Protected sea-beaches near Norfolk, Virginia, July, 

 1870, McMinn. The well-known Sand Carex of Europe. 



E. Mulilenhergiance, Tuckerman, Enum. Meth. 9. Spikes green or nearly so 

 when mature, aggregated or scattered, never in compound lieads ; perigynium 

 mostly short-ovate, in most cases not conspicuously nerved. Staminate 

 flowers uniformly borne at the top of the spike. 



