SYNGENES1A NECESSARIA. 
467 
latis, inaequaliter den- 
tato serratis, supra 
scab r is, superioribus 
sessilibus; panicula tri- 
chotoma. 
lanceolate, unequally 
toothed and serrate, 
scabrous on the upper 
surface, the upper ones 
sessile; panicle tricho- 
tomous. „ 
Sp. pi. 2. p. 2333. Pursh, 2. p. 57 8. Nutt. 2. p. 183. 
S. Ternifolium, Mich. 2. p. 146. 
Stem four to six feet high, slightly angled, glabrous, generally purple. 
The upper leaves generally sessile, the middle and lower ternate, on short 
petioles, all ovate-lanceolate, serrulate, tapering to an acute point, slightly 
scabrous and sprinkled with hair on the upper surface, glabrous and reiicu- 
lately veined on the under. Flowers in a terminal corymb. Scales of the 
involucrum ovate, rather acute, ciliate, loosely appressed. Florets of the 
ray about fourteen, about an inch and a half long, bright yellow. 
Grows in the mountainous districts of Carolina and Georgia. 
Flowers August — October. 
11. Ternatum. 
Stem terete, smooth; 
leaves verticillate by 
threes, petiolate, lance- 
olate, slightly toothed, 
ciliate at base, some- 
what scabrous, the up- 
per ones scattered, 
sessile; panicle dicho- 
tomous; the calyx frin- 
ged. 
Sp. pi. 3. p. 2333. Pursh, 2. p. 578. Nutt. 2. p. 183. 
Stem four to six feet high, slightly angled, glabrous. Leaves nearly ses- 
sile, all narrow lanceolate, very acute, denticulately or sometimes acutely 
serrate, a little hairy and scabrous on the upper surface, the under reticu- 
lately veined and hairy along the midrib and larger veins. Flowers in a 
loose terminal corymb. Scales of the involucrum ovate, rather acute, cili- 
ate, loosely appressed. Florets of the ray twelve to fourteen, about an inch 
and a half long. 
I am not satisfied that I have accurate!}' understood these two last species, 
nor as far as my specimens are concerned that they are sufficiently distinct; 
b. caule tereti, laevi; 
foliis terno-verticillatis, 
petiolatis, lanceolatis, 
subdenticulatis, scabri- 
usculis, basi ciliatis, su- 
perioribus sparsis, ses- 
silibus; panicula dicho- 
toraa; calycibus ciliatis. 
