SYNGENESIA. HQUALIS. 125 
s 1-flowered; leaves runcinate. 
Species. 1. L. Taraavacum. Naturalized: introduced.— ~ 
A genus of 5 species, indigenous to pare. 
528. PRENANTHES. L£. 
Floseuli definite, 5 to 20. Cali caliculate. 
Receptacle naked. Pappus simple, subsessile. 
A polymorphous, but natural genus, principally herba- 
ceous, rarely shrubby, and 1 species spinescent; leaves for 
the most part angularly dentate, pinnatifid, or runcinate, 
rarely minute and subulate; flowers often paniculate, con- 
ae apie subcorymbose or solitary and terminal, purp- 
ish, white, ochroleucous, or rarely yellow. Calix 4, 5; 8, 
or 12-parted, squamose at the base. Pappus somewhat 
scabrous. 
Species. 1. P. altissima. 2. cordata. 3. virgata. P. 
rubicunda. Willd. 4. simplex. Pu. 5. crepidinea. 6. alba. 
7. Serpentaria. Px. Scarcely distinct enough from P. aléa. 
8. racemosa. 9. tilinoensis. 
10. —— Px. Dwarf and nearly leafless; stem numer- 
Ferg dichotomously branched, grooved; leaves subu- 
late and sheathing, very short, branchlets subfastigate, 1- 
flowered; calix 5-cleft, 5 to 7-flowered. Has. from the 
river Platte to the Mountains, in the alluvial sand-hills of 
the Missouri. Flowering in May. Flowers rosaccous. . 
Oss. Root tuberous and brittle, very deep and creeping, 
charged with an abundant milky sap. Stems about 12 
inches high, appearing nearly leafless. Radical leaves 
none, those of the stem from 1 to 10 lines long and pun- 
gently acute 
11. * aphylla. Dwarf and almost leafless; stem nearly 
simple, sparingly and virgately branched, grooved; radical 
Jeaves narrow linear, entire, cauline minute, subulate, and 
very remote; branches 1-flowered, elongated; calix 8-par- 
ted 10 to 12-flowered. Has. Near St. Mary’s in West 
Florida —Dr. Baldwyn. Qxs. Root perennial. Stem 
| . smooth, about 12 inches high, with only 2 or 3 remarka- 
bly naked virgate branches; leaves scarcely visible; flow- 
ers large, and pale rase-colour. Nearly allied to the prece- 
din; 
a, genus of near 40 species scattered over both hemis- 
pheres; Japan affords 10 species, India 4, Europe and ‘oN 
Levant 9, Siberia 2, Caraccas 1, and 1 in the island of 
_. Teneriffe, a few others are of uncertain locality.—Several 
"of the North American species, in common with other ge- 
_ nera of the Cictoraces, afford on incision an abundant 
fluid, well a eae re 
