314 
SYNGENESIA 1EQUAL1S. 
pidatis, rigidis, semina gid, as long as the 
aequantibus. seed. 
1. Integbifolia. 
Nutt. 2. p. 139. 
Root perennial. Stem erect, three to four feet high, a little scabrous, 
branching near the summit. ^Leaves alternate, linear lanceolate, entire, 
scabrous. Involucrum compos'd of eight to twelve leaves ; leaves oblong, 
membranaceous. Florets numerous, with a border deeply five-cleft ; seg- 
ments reflected. Stamens extended. Style longei than the stamens, two- 
cleft. Stigmas linear, pubescent. Seed quadrangular, slightly scabrous, 
black, tapering at base, to a very acute point. Pappus nine-leaved, leaves 
subulate, with a midrib-prominent and rigid, pubescent on the back 5 the 
margin membranaceous, lacerate. 
Discovered by Dr. Baldwin, near St. Mary’s, Georgia. 
Flowers. 
MELANANTHERA. Mich. 
Involucrum duplici 
serie poly phy Hum, sub- 
aequale. Receptaculum 
paleaceum, convexum, 
paleis foliaceis. Semi- 
na turbinata, angulata, 
vertice depresso. Pap- 
pus erectus, (2 — 8) sca- 
ber, distinctus, decidu- 
us. Brown. 
Involucrum many 
leaved, leaves nearly 
equal in a double se- 
ries. Receptacle chaf- 
fy, convex, with the 
chaff leaflfkc. ' Seeds 
turbinate, angled, de- 
pressed at the summit. 
Pappus composed of 
j distinct, deciduous, 
J scabrous bristles. 
1. Hastata. 
M. foliis hastato-tri- 
lobis; paleis receptacu- 
li lanceolatis, acumina- 
tis. 
Leaves hastate three 
lobed; chaff of the re- 
ceptacle lanceolate, a- 
cuminate. 
Mich. 2. p. 107. Pursh, 2. p. 519. Nutt. 2. p. 140. 
Bidens Nivea. Sp. pi. 3. p. 1721. Walt. p. 201. 
