ORDER CXLI. CYPERACE.E. 5.37 



14. C. specio'sus, (Vahl.) Stem erect, angled. Leaves channeled, 

 serrulate. Spikts in corymbs; spikelets subulate, 6 — 8-flowered, dis- 

 tichous. Involucre many-leaved, long ; involncels longer than the par- 

 tial umbels ; common peduncles sheathed at the base. — If. Aug. — > 

 Oct. Wet places. 2 — I feet. 



15. CL kii.kti.'mis, (Vahl.) (C. mariscoides, Ell.) Stem erect, glabrous, 

 naked. Leaves channeled, serrulate. Spikes in globose heads, termi- 

 nal ; involucre 3-4 eaved, long. Glumes compressed. — If. June — Sept. 



• soils. 1 foot. 



16. C. po.'Efoii'mis, (Pureh.) Stem triquetrous, glabrous. Leaves 

 linear, glabrous. Spikes fascicled, flattened ; involucre 3 leaved, 2 of 

 them long. Glumes ovate, yellowish. — 2£. July — Aug. Sandy fields. 

 6 — S inches. 



17. C. fascicula'tus, (Ell.) Stein triquetrous. Leaves setaceous, 1 

 or 2. Spikes many-flowered, in terminal fascicles; involucre 2 leaved, 

 linear. Glumes with the keel green. — If. June — Aug. Middle Geo. 

 6 — S inches. 



18. C. tetrago'ncs, (Ell.) Stem naked, angled. Leaves channeled, 

 serrulate. Umbels many-rayed. Spikes 3 — 5-flowered. — U • 2 — 3 ft. 



19. C. Ensle'nii, (Pursh.) Stem 3-angled. Leaves linear, scabrous 

 alon^ the midrib and margins. Spikes corymbose, branching at the 

 base ; spikelets numerous, linear, crowded, brown ; involucre 8-leaved, 

 exterior one longest. — 2f. August — Sept. In wet places. 1 — 2 feet. 



Gkkdb II.— MARIS'CUS. Vahl. 3—1. 

 (From the Celtic mar, a marsh.) 



Flowers in spikes, clustered in heads. Spikes 1 — 8-flowered. 

 Stamens 3. Slyle 2-cleft. Seeds and stem triquetrous. Seed 

 naked. 



1. 11 ovula'ris, (Vahl.) (M. echi?iatus,~E\l.) Stem glabrous, obtuse- 

 I ly 3-;in^led. Leaves linear, channeled, glabrous. Spikes 6 — 8-flowered, 



linear-lanceolate, in globose heads; flowers in 2 rows. Stamens usu- 

 ally .3. — June to Oct. Common. 1 — 2 feet. 



2. M. rethofrac'tus, (Vahl.) Stem naked, pubescent, obtusely 3- 

 angled. Leaves pubescent, linear. Spikes 1 — 3-flowered, reflexed, col- 

 lected inio an obovate head. Seed oblong, destitute of bristles. — June 

 — Aug. Cultivated lands. Common. 1 — 2 feet. 



3. M. cylin'dricus, (Ell.) Stem naked, pubescent, obtusely 3-angled. 

 Leaves linear, channeled, glabrous. Spikes 2 — l-rlowered, crowded, 

 compressed. Glumes keeled, acute. Seed acute, without bristles. — 

 June — Aug. Common about cultivated fields. 2 — 3 feet. 



Genes III.— KYLLIN GIA. llottb. 3—1. 

 (In honor of Kylling, a Danish botanist.) 



Flowers distinct, arranged in a roundish spike, imbricate. 

 Glumes 2. 1 -flowered. Palcec 2, longer than the glumes. 



1. K. monocepu'ala, (L.) Stem filiform, 3-angled. Leaves linear 

 heads single, inclining to one side ; involucre generally 8-leaved, one of 

 the leaves erect. — 2f . October. Lower Geo. 2 — 12 inches. 



