192 Rhodora [OCTOBER 
indicated by the type in his herbarium. The plant interpreted by 
the writer as C. striatula Michx. answers Michaux’s description, and 
is the only one in the “Carolina” region cited which does. It also 
resembles a rather poor photograph of the type in the Bailey herbari- 
um. This photograph was made many years ago, and is not clearly 
identifiable. 
The types of the following species, all in European herbaria, should 
be re-examined: C. laxiflora Lam. Dict. de Bot. iii. 392 (1789), C. 
heterosperma Wahl. Köngl. Acad. Handl. xxiv. 151 (1803), C. anceps 
Muhl. in Willd. Sp. Pl. iv. 278 (1805), Schk. Riedgr. Nachtr. 66 f. 
128 (1806), C. nematostachya Willd. in Schlecht. Linnaea x. 264 
(1836), C. striatula Michx. Fl. Bor. Am. ii. 173 (1803), C. truncata 
Boeckl. Flora xli. 649 (1858), and C. bulbosa Boeckl. Flora xxxviii. 
597 (1855). 
a. Perigynia strongly and often sharply (21) 24-45-nerved. 
b. Perigynia with à short and rather broad apex or point 
which is turned more or less to one side. 
c. Spikes alternately flowered; scales truncate or retuse, 
muticous, subflabellate at tip; staminate spike very 
slender, inconspicuous, equaled or exceeded and often 
hidden by the aggregated pistillate spikes; culms 1.7— 
3.5 mm. broad, almost winged, the angles smooth or 
slightly erose; bracts erect: the broadest 8-20 mm. 
wide; besbdoet basal leaves very coarse, 10-40 mm. 
WER KN ere bid be cin no Beds cae e E 1. C. albursina. 
c. Spikes denser, perigynia much overlapping; scales 
subtruncate, rounded or acute, usually cuspidate; 
staminate spike conspicuous or inconspicuous; 
culms narrower, slightly margined, the angles more 
or less erosely or retrorsely serrulate-scabrous; 
leaves and bracts narrower, or sometimes rather 
broad. 
d. Basal sheaths brown; bracts usually over-topping 
the culm; staminate spike sessile or short-stalk- 
ed; rhachis of pistillate spikes sharply angled usually 
smooth, the scales pale: tip of the perigynium 
slgntiy or abruptly bent. Aë, d e VE A a e ten 2. C. blanda. 
d. Basal sheaths purple, but sometimes weathering 
away; leaves narrower; bracts rarely overtopping 
the culm; staminate spike usually long-stalked, 
pistillate spikes more scattered, the scales more 
often colored ; rhachis usually narrower, less sharply 
angled, granulose; perigynia more cellular, paler, 
the tip usually more strongly recurved; plants gen- 
orally more swhder. ... oco bs evo eo DOR cee 3. C. laxiflora, 
b. Perigynia with a narrow and sharp more beak-like 
straight or only slightly oblique apex. 
c. Basal sheaths purple at least when young. 
d. Angles of the culm plainly granulose; tips of the 
turgid perigynia usually very short, usually con- 
tracted and beak-like, but the perigynia sometimes 
