TRIANDRIA, MONOGYNIA. 



26. Xvris, Gen. pi. 89. ( Gramir.cce . ) 



Flowers in an ovate -cylindric capitulum. — 

 Calix glumaceous, 3-valved, valves unequal, 

 the outer coriaceous. Corolla 3-petalled, 

 equal. Stigma trifid. Capsule 1 -celled, 3- 

 valved. Seeds very numerous, and minute, 

 Nutt. 



1. X. heads closely imbricate ; calix shorter than the nexuosa, 

 bracteas, sparingly feathered ; leaves long, sword- Muh1, 

 shaped, twisted. Elliot. 



X. Caroliniana, Walt, Lam. and Poir. 

 X. Jupicai, Mich. 

 X. anceps, Pers. ? 



JVaved- stemmed Xyris. Tell qiv flowering Rush. 



From ten inches to 2 feet high. Leaves linear, stem anci- 

 pital flexuose. Flowers yellow, in an imbricated terminal 

 capitulum. In marshy meadows and wet places with sedge 

 and other grass, common, particularly in Jersey. July. 



27. Rhykcosphora, Vahl, enum. pi. 2. p. 229. ( Cyperiodece . ) 



Scales of the calix collected into a spike, the 

 inferior ones empty. Corolla 0. Style per- 

 sistent at base. Bristles at the base of the 

 Seed. 



i. R. Spikes in corymbose clusters ; stem above, alba. 



3-angled ; leaves linear channelled ; bristles of 



the seed 10. Ait. Kew. 1. p. 127. 

 Schoenus albus, Mich. 1. p. 34. 



White bog-rush. 



From one to two feet high. Glumes whitish. In the bogs 

 and marshy places of Jersey, every where very common. Pe- 

 rennial. July. 



2. S. spikes clustered in corymbs, very distant, by giomerata. 

 pairs ; stem obtuse-angled ; leaves linear. Vahl. 



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