46 



CATALOGUE OF THE 



obtusa, Schultes. 



Wet places. Common. 



Engelmanni, Steud. 



Differs from the last in its cylindrical spikes, 

 shorter bristles and always 2-cleft style. Missis- 

 sippi bottoms opposite St. Louis, Enge'mann. 



var. detonsa, Gray. 



Bristles wanting, or only their bases present. 

 Spikes sometimes proliferous at base. Missis- 

 sippi bottoms 1 mile south of Oquawka. 



fluviatilis, Gray. 



C. & N. 



palustris, R. Br. 



Common. 



Wet places. 



Wolfii, Gray. 



"Perennial, with very slender creeping rhizomes 

 in small, scattered tufts : culm a foot high, slen- 

 der, pale-glaucous, two-edged, flat on one side, 

 convex on the other, faintly striate on both, 

 sheath with obliquely truncate hyaline opening : 

 spike ovate-oblong, acute ; scales oblong-ovate, 

 obtuse, scarious, pale tinged with purple ; style 

 3-parted ; achenium obovate, somewhat shining, 

 faintly costate with about 9 ribs, the spaces be- 

 tween the ribs transversely marked with dotted 

 lines, tubercle small, depressed-truncate and with 

 the center more or less beaked ; bristles of the 

 perigynium (always ?) none." 



Margins of ponds. Peoria county, Brendel ; 

 Fulton, Wolf; Menard, Hall. 



corapressa, Sullivant. C. & N. 



Wet places, from Menai-d county northward. 



intermedia, Schultes. C. & N. 



With the last. 



tenuis, Schultes. 

 Wet places. 



acicularis, R. Br. 



Margins of ponds. 



Common. 

 Common. 



SCIRPUS 



pauciflorus, Lightfoot. N. 



Wet j:daces. McHenry county, Vasey. 



caespitosus, L. N. 



McHenry county, Vasey. 



pungens, Vahl. 



Wet places. Frequent. 



validus, Vahl. 



Ponds. Common. 



debilis, Pursh. 



Hancock county, Mead ; Menard, Hall. 



supinus, L., var. Hallii, Gray. 



Mason county, Hall. 



Margins of ponds and streams, from Menard 

 county northward. 



atrovirens, Muhl. 

 Wet prairies. Frequent. 



polyphyllus, Vahl. S. 



Wet places. St. Clair county, Brendel ; S. 111., 

 Vasey. 



lineatus, Michx. 



Low grounds. Common, except at the north. 



Eriophorum, Michx. 



Wet places. Frequent. 



ERIOPHORUM 



Virginicum, L. 



Near Chicago, Babcock. 



polystachyon, L. N. 



Bogs. Common near Chicago, Babcock ; Win- 

 nebago county, Bebb ; McHenry, Vasey. 



gracile, Koch. N. 



Bogs. Peoria co., Brendel ; McHenry, Vasey. 

 FIMBRISTYLIS 



spadicea, Vahl., var. castanea, Gray. 



Sandy low grounds. Near Chicago, Babcock ; 

 Kankakee county, Hill ; Henderson ; St. Clair, 

 Brendel. Rare. 



laxa, Vahl. 



Illinois — Gray's Manual. 



autumnalis, Roam. & Schult. 



Margins of streams and ponds, with Cyperus 

 inflexus and Eragrostis reptans. 



capillaris, Gray. 



Sandy barrens. Scarce. 

 RHYNCHOSPORA 



cymosa, Nutt. 



Kankakee county, Hill. 



alba, Vahl. N. 



Bogs. Peoria co., Brendel ; McHenry, Vase}-. 



capillacea, Ton*. 



Elgin, Kane county, Vas'ey ; St. Clair, Brendel. 



glomerata, Vahl. 



Near Chicago, Babcock ; Kankakee co., Hill. 



corniculata, Gray. S. 



Mound City, Pulaski county, Vasey. 

 SCLERIA 



triglomerata, Michx. 



Prairits. Frequent. 



