Scleria 



Cyperaceae 



209 



53 



Map 409 

 Rhynchospora corniculata 

 var. interior Fern. 



o 50 



Map 412 



Rhynchospora macrostachya Torr. 



5o 



Map 41 

 Rhynchospora glomerata 

 var. minor Britt. 



6a. Rhynchospora glomerata var. minor f. discutiens (Clarke) Fern. 

 (Rhodora 37: 402-403. 1935.) This form has been seen from only Lake, 

 Porter, and Starke Counties. The habitat is that of the species. 



N. J. to Ind. and southw. 



515. SCLERIA Bergius Nutrush 



Achenes smooth, ovoid, about 3 mm long including the basal disk (hypogynium) . 



Hypogynium entirely covered with a white crust 1. S. triglomerata. 



Hypogynium naked at the base, supporting about 9 very short tubercles just below 



the achene 2. S. oligantha. 



Achenes not smooth, spheroidal, 1.5-2 mm long (2.5 mm long in Scleria setacea). 

 Achenes irregularly papillose or warty, or transversely wrinkled. 



Culms, leaves, and scales densely pubescent 3. S. panciflora var. caroliniana. 



Culms, leaves, and scales essentially glabrous 4. S. verticillata. 



Achenes irregularly pitted. 



Surface of achene glabrous; achenes 2 mm or less in length; lobes of hypogynium 

 emarginate or cleft, somewhat obtuse; culms usually erect; peduncles sessile 

 or short ' 5. S. reticularis. 



