64 TRIANDRIA. MONOGYNIA. sch(enijs. 



1, (mostly naked at the base.) Gen. pi. 92. Vahl 

 Enum. II. p. 207. Nutt. Gen. I. p. 33. Roem. ^ 

 Schult. Gen. 169. Lam. III. t. XXXVIII. Nat. 

 Ord. Cyperoide^ Juss. Bog-rush, 



S. mariscoides Muhl.: culm terete or a little sulcate, 

 leafy ; leaves channelled, senniterete ; umbel terminal ; fas- 

 cicles of spikes 3 on each peduncle ; seed naked, rounded at 

 the base. M u h I. Gram. p. b. 



Root perennial. Culm about 2 feet high, smooth, or with rough 

 dots. Leaves rounded on the back, channelled above, cylin- 

 drical or triquetrous at the extremity. Flowers somewhat 

 umbelled, terminal ; heads peduncled, consisting of 3 fascicles, 

 each of about 12 spikes; peduncles erect, unequal, com- 

 pressed. S/iilces lanceolate, brown, with bracts at the base ; 

 bracts longer than the spikes. Glumes ovate, carinate. Sta- 

 mens 3. Style 2 — 3-cleft. Seed crowned with the remains of 

 the style, slightly striated longitudinally. Muhl. 

 Hab. In bogs. Pennsylvania. July. Muhlenberg: 



I have not had an opportunity of examining this plant, but 

 it appears to resemble S. mariscus, which is the type of the 

 genus Cladium* of R. Br own. It differs, however, in hav- 

 ing fewer spikelets in each fascicle, and in being triandrous. 



36. RHYNCHOSPORA. VahL 



Glumes fascicled into a spike, the inferior ones 

 empty. Corolla 0. Seed 1, crowned with the per- 

 sistent st3'le; base surrounded with bristles. Fa hi 

 Enum. II. p. 229. R.Brown Prod. Fl. N. Holl. 

 I. p. 230. Nutt. Gen. I. p. 33. Roem. ^ Schult. 

 Gen. 173. Schcenus L. Nat. Ord. CypERoiDEiE 

 Juss. 



1. R. alba Vahl : spikes in corymbose fascicles; culm 

 triangular above ; leaves setaceous ; seed somewhat lenticu- 

 lar ; bristles about 10. Vahl Enwm. 11. p. 236. Pursh 

 F/. 1. p. 49. Elliott Sk.\,'^. bl. Ro em. S/ Schult. 

 1. p. 87. ScKGENUS albus L. Willd. Spec. 1. p. 267. 

 Mich. FL I. p. 34. Big. Bost. p. 13. Muhl. Gram. 

 p. 5. 



Root creeping. Culm slender, a foot or 18 inches high, leafy, 

 very smooth. Fascicles axillary and terminal, with setaceous 



• Spiculie undique imbricatx 1 — 2 florae, squamis extlmis vacuis. Setr 

 squamulae hypogynac nuUae. Stylus deciduus cum ovario inarticuUtus^ 

 JVmx calva i nucleus lavis. R.Bro-wn Frod, I. p. 236. 



