TARNASSIACEyE. (l»ARNASSIA FAMILY.) 37 



1. D. filiformis, Raf. Rhizoma thick, creeping; leaves erect, filiform, 

 elongated, smooth at the hase ; scape smooth, many-flowered ; flowers large, 

 bright purple ; calyx hairy ; seeds oblong, dotted. — Low pine barrens, Florida 

 and northward. April, y. — Scapes 1°- 1|° high. Flowers l'or more wide. 



2. D. longifolia, L. Rhizoma long and slender ; leaves linear-spatulate, 

 gradually narrowed into the long and smooth petiole, the upper ones erect ; 

 scape smooth, declined at the base, 8 - 12-flowered ; calyx obovate ; seeds 

 oblong. (D. foliosa, Ell.) — Sandy swamps, oftener in water, Florida and 

 northward. May and June. % — Scapes 4' -6' high. Flowers small, white. 



3. D. capillaris, Poir. Rhizoma short or none ; leaves spatulate, nar- 

 rowed into the long and smoothish petiole ; scape slender, smooth, erect, 9 - 20- 

 flowered ; calyx obovate ; seeds_pval, finely furrowed and granular. (D. brevi- 

 folia, var. major, J. look.) — Boggy ponds, Apalachicola, Florida, to South Car- 

 olina {Dose.). April and May. ©or 1J. — Scape 6'- 15' high. Leaves 2' -3' 

 long. Flowers pale rose-color. 



4. D. rotundifolia, L. Rhizoma none ; leaves orbicular, abruptly con- 

 tracted into the hairy petiole ; scape erect, smooth, G -10-flowcrcd ; calyx ovoid; 

 seeds covered with a loose membranaceous coat. — Mossy swamps, Florida and 

 northward. May and June. (V) — Scapes 6' -9' high. Leaves 2' long. 

 Flowers white. 



5. D. brevifolia, Fursh. Glandular-pubescent throughout ; rhizoma 

 none ; leaves short, wedge-shaped ; scape erect, 3 - 6-flowered ; calyx oval ; 

 seeds ovoid, minutely glandular. — Low sandy pine barrens, Florida to North 

 Carolina. April, (i) — Scapes 3' - G' high. Leaves §' long. Flowers £' wide, 

 white. 



2. DION^SA, Ellis. Fly-trap. 



Stamens 10-15. Styles united. Stigmas 5, fimbriate. Capsule 1-eellcd, 

 opening irregularly. Placenta at the base of the cell, many-seeded. — A smooth 

 perennial herb, with the habit of Drosera. Leaves spreading, on broadly-winged, 

 spatulate petioles, with the limb orbicular, notched at both ends, and fringed on 

 the margins with strong bristles ; sensitive ! Flowers in a terminal umbel-like 

 cyme, white, bracted. 



I. D. muscipula, Ellis. — Sandy bogs in the pine barrens of North Car- 

 olina and the adjacent parts of South Carolina. April and May. — Scape 1° 

 high, 8- 10-flowered. Flowers 1' wide. — For an interesting account of this 

 remarkable plant, see Curtis's Plants of Wilmington, in the Boston Journal 

 of Natural History, Vol. I. 1834. 



Order 17. PARXASSIACE7E. (Parxassia Family.) 



Perennial smooth herbs, with ovate or reniform chiefly radical and 

 entire leaves, on long petioles, and large solitary flowers terminating the 

 scape-like, 1-leaved stem. — Sepals 5, persistent. Petals 5, ovate or obo- 

 4 



