“168  «——SPEN'TANDRIA. DIGYNIA. 
-. flowered? Petals oblong-oval, white, externally cinereous- 
near the points. Lepanthium white, without tube! 
i. y sessile. Pollinium short, lobes even, angularly 
_ infracted, styles 2, long. Has. From Carolina to Florida. 
‘Specimen collected by Dr. Baldwin, from whom I receiv- 
ed it, under the name of A. cinerea. 
; Leaves ecattered, or verticillate. 
18. verticillata. Stem erect, often branching, marked 
with pubescent lines, leaves smooth, narrow linear, crowd- 
ed, mostly verticillate; tube of the lepanthium con- © | 
spicuous, segments very short, awns long and falcate- - 
19. longifolia. Flowers greenish.—In Carolina, Georgia, 
Jilinois, and Louisiana. ~Nearly allied to ~2. wiridi flora 
of Pursh, if not the samet 20. *lannginosa. Plant very 
_ low, decumbent, and partly lanuginous; leaves ovate, scat- I 
tered, umbell solitary, terminal. Oxs. 4to 6 inches high; t 
root tuberous, flowers greenish. My specimen was very 
imperfect. Hap. About 30 miles below the confluence h 
of White river with the Missouri, on dry and gravelly | 
hills. It is the only species which I met with in the up- 
per part of Louisiana. 21. tuberosa. 
The United States already afford about half as many 
species of this genus as the rest of the world, thus far 
explored. he tropical parts of America, according to 
Persoon, produce only 5 spec'es. At the Cape of Good 
Hope there até 9; 5 in India and Ceylon; 1 in Persia, 
esides f A. <a Nes in — 2 in Arabia Felix, 13 
uria, and. 1 in Siberia. T' European species ap- 
either referrible to Cynanchum eet conateeate a dis- 
eee 
ae Niall 
- + This D ant, acenrding to R. Brown, is a species of his genus i 
‘ ocarpus, if the mere absence of the corniculum or atista, . | 
usaall Sia out of the concave lobes of the lepanthium, can 
‘be considerec 
is like- hy 
le species 
