TRIANDRIA. MONOGYNIA. f 



b- Corolla tripetalous. 



24. XYRIS. Nutt Gen. 43. 



[From the Gr. Xyros, pointed, or sharp; its leaves terminating in a sharp point.] 



Cal. glumaceoLis, 3 valv'd, unequal, the outer coriaceous. Cor. petals equal, crenate. Caps. 1 celled, 3 valv 'd. 



X. FLEXUOSA. Ell. Heads closely imbricate, ovate; calyx shorter than the bractes; leaves twisted. 



Synon. X. jupicai. Mx. X. caroliniana. Ph. Fw/g-o— Yellow-flowering Rush. 



Fi. Middle of Au-ust. Fr mat. 



Hob. Wet, gravelly places: rivulet, near Cyrus Barnard's: rare. 9 to 15 inches high: flowers yellow'. 



C Flowers glumaceous. a. Carolla 0. 



25. SCIRPUS. Nutt. Gen. 47. 



[An ancient Latin name for the Bullrush; which belongs to this family.] 

 Cal. Chaffy scales, imbricated on all sides in a spike. Style filiform, deciduous. 



§ 1. Spike solitary, terminal. 



S. TRiCHODEs.' Mahl. Stem setaceous, slightly furrowed, purple at base, cespitose; ^ike ovate- 



Synon. S. capillaceus. Mx. S. pusillus. Ph. 



Fl. Middle of July, and after. Fr. mat. Beginning of October. 



Hah. Barrens, near George Vernon's: rare. 1 to 3 inches high. 



Ohs. A diminutive and remarkable species, which Mr. Schweinitz thought new to him; but I am inclined 

 to believe it is the plant above referred to. 



S. TENUIS. Miihl. Stem 4 angled; Sheath purple, truncate, submucronate; spike elliptic; root horizontal. 

 FL Latter end of June. Fr. mat. 



//aft. Wet places: meadows, &c. — frequent. About a span high. 



S. cAPiTATrs. Muhl. Stem compressed, cespitose; spike ovate; glumes brown, with white margin. 



Fl. Middle of May, and after- Fr- mat. 



Hah. Swamps, and wet places: J- H--Brinton's: frequent. 6 to 12 inches high. 



Ohs. Dr. Baldwin agreed with Dr. Muhl. in thinking this, and the S. ovatus of Willd. to be the same; byt 

 he assured me it was very distinct from S. tuberculosus, of Mx. See Muhl. Gram, descript. 



§ 2. Spikes nvmerons, terminal, t Without leaves. 



S. L-ictrsTnis. Muhl. Stem round, tapering; umbels decompound; spikes ovate; scales mucronate; 



r«;g-o— Common Bull-rush. Tall club rush. 



Fl. Beginning of July. Fr. mat. Latter end of August. 



Hah. Swampy meadows: Joseph Taylor's: somewhat rare. 4 to 5 feet high. 



06.5. Dr. Withering says this species is used, in England, in making the seats of rush-bottomed chairs, he 

 but in this country it is not esteemed for that purpose; the S. triqaeter, or americamis, being much prefer* 

 able. This latter grows in the tide-water marshes along the Delaware; but not in this vicinity. 



§ 3. Spikes numei'ous, lateral: without leaves, 



S. BEBiLis. Muhl. Stemstriate, cespitose, base sheathed, point strict; spikes ovate, sessile-conglomerate. 



Fl. Middle of August. Fr. mat. IVIiddle of September. 



Hab. Wet, gravelly places: rivulet, near Cyrus Barnard's: not common. 12 to IS inches high, 



§ 4. Spikes numerous, subterminal. ft Leaf if at base only. 



S- ciLiATiFOLrtrs. Ell. Stemstriate, setiform; leaves Iinear)Channelled,ciliate; spikes ovate-lauccolate'. 



Synon. S. capillaris. Muhl. 



Fl. Latter end of July. Fr. mat. 



Hab. Arid hills: Righter's field, west of the Barren spur: rare. 2 to 6 inches high. 



06s. I am pretty well satisfied that my specimen is the S. capillaris of Muhl. Gram, descript. ubej: 

 S. FERRUGiNEusl Muhl. Stem compressedj striate; leaves nearly flat, striate; spikes ovate, acurajnate* " 

 Synon. S. puberulus. BIx? It does not, however, exactly correspond. 

 Fl. Latter end of July. Fr. mat. 



Hab' Moist places on the Barren ridge: frequent, 3to9inche»hi§^h- 



