SYNGENESIA ASQUALIS. 
289 
6. PrjEalta. 
V. caule altissimo, 
anguloso, dense-pube- 
scente; foliis crebris, 
lanceolatis, acute ser- 
ratis, subtus pubescen 
tibus; corymbo fastigi- 
ato; involucri squamis 
ovatis, acutis, muticis. 
Stem very tall, an- 
gled, densely pubes- 
cent; leaves numerous, 
lanceolate, acutely ser- 
rate, pubescent under- 
neath; corymb fastigi- 
ate; scales of the invo- 
lucrum ovate, acute, 
unarmed. 
Sp. pi. 3. p. 1633. Mich. 2. p. 95. Pursh, 2. p. 511. 
With this species I am unacquainted. 
Grows from New-England to Carolina. Pursh, 
Flowers August — October. 
7. Altissima. Nutt. 
V. caule glabro; fo- 
liis lanceolatis, serratis, 
scabriusculis; involucro 
parvo, hemispherico, 
squamis ovatis, acutis, 
ciliatis, muticis, arete 
appressis. 
Stem glabrous; 
leaves lanceolate, ser- 
rate, slightly scabrous; 
involucrum small, he- 
mispherical, scales o- 
vate, acute, fringed, 
unawned, closely ap- 
pressed. 
Nutt. 2. p. 134. 
Chrysocoma Gigantea? Walt. p. 296. 
Stem six to ten feet high, nearly glabrous. Leaves very long, narrow, 
nearly smooth on both sides, slightly scabrous, serrulate. Flowers small, in 
an irregular terminal corymb. Involucrum hemispherical; scales ovate, 
acuminate, slightly mucronate, ciliate, closely appressed. Corolla purple. 
Seeds furrowed, ribs very slightly hairy. Pappus very short, the interior 
hairy. 
This species, although the leaves are not rugose, is probably the C. Gigan- 
tea of Walter. It is readily distinguished by its small compact hemispheri- 
cal involucrum, from any other species which I have seen. 
Grows in ditches and damp soils. 
Flowers August — October. 
vol. ii. o 2 
