148 
18. Rudbeckia angulata R. Stem 
with acute angles, uniflore, leaves 
adpressed hirsute oblong acute en- 
tire, the lower ones opposite, peri- 
anthe hirsute, segments linear ob- 
tuse* 
19. Silphium reticulaimn Raf. 
Stemless, radical leaves oblong ly- 
rate lobate obtuse smooth, scape 
rough uniflore, perianthe ample, 
segments round reticulate venose. 
£0. Vaccinium glaucum R.Leaves 
ovate oblong entire, nearly obtuse, 
glaucous beneath, peduncles axilla- 
ry 1 to 3 flore, flowers small cam- 
panulate, stamens exserted. 
21. Osmodium nigrum R. Leaves 
cuneate oblong acuminate entire stri- 
gose fuscate. They become black 
when dry, near to 0 mo Up. 
22. Typha spiralis Raf. Leaves 
spirally contorted, eimform and va- 
ginate at the base, end flat thick ob- 
tuse, spikes annexed each with a 
spatha. This is the T. latifolia of 
Cuba, and the Jamaica authors. 
23. Sisyrinchium teres Raf. Stem 
round, hardly biangular above, leaves 
narrow striate, flowers subpanicu- 
late ample, spatha bivalve subequal 
membranaceous acute 2-3 flore, se- 
pals submucronate. Florida and 
Louisiana. 
23. Calipogon parvijlomm Raf. 
Root bulbose, stem one leaved 3 — 5 
flore, leaf long, linear striate, flow- 
ers spicate, minute, bracts subulate, 
labellum undulate. FI. and Louis. 
25. Tradescantia divaricata R. 
Leaves remote divaricate oblong 
lanceolate, base spathiform, umbel 
multiflore, spathas 2 subequal lan- 
ceolate divaricate, calix smooth. 
26. Tradescantia graminifolia R. 
Stem slender, leaves graminiform 
erect, flat, striate, umbel pauciflore 
uneven, spatha of many short obtuse 
scales, calix smooth, 
27. St achy & revoluta R* Leaves 
linear sessile obtuse canescent, mar- 
gin revolute, whorls 6 flore, flowers 
subsessile, calix striate hispid subbil- 
abiate. FI. and Louisiana. 
28. Stachys sessiliftora R. Leaves 
oblong cordate serrate acute smooth, 
whorls few pauciflore, flowers ses- 
sile. 
29, Brosera unifioraU. Leaves 
shortly petiolate spathulate glandu- 
lar all over, scape uniflore, baS^ 
leafy. 
30* Brosera sessilifolia R.Leaves 
cuneate sessile, scape pauciflore pi- 
lose, flowers racemose large petals 
cuneate. 
31. Avicenniafloridana R. Shrub- 
by, leaves perennial oblong acute, 
tomentose beneath flowbrs in sessile 
clusters. In FI. Louis, and Jamaica, 
the A. tomentosa of Nuttal and 
Brown but the Asiatic sp. is a large 
tree with paniculate flowers. 
32. Lantana florid ana R. Branch- 
es square scabrous, leaves rugose 
rough, ovate lanceolate, crenate ser- 
rate, veins pubescent, petiols short, 
bracts subulate, capitule crowded, 
peduncles clavate. h. camara of 
Bart. Elliot and all our authors but 
different: flowers versicolor, yellow, 
orange, red, crimson or scarlet on 
same shrub, berries globular, blue, 
small. 
109. ON 3 SP. OF TYPHA. 
The Typha latifolia was said to 
grow from China to America, but 
whenever closely described by bota- 
nists, their descriptions evince diffe- 
rent sp. blended under that name. 
Those of N. and S. Europe, India, 
China, Africa, S. and N. America 
are all distinct. 
W e have even several sp. in N. 
America, the T. spiralis of the W. 
Indies and Florida was mentioned in 
the last essay, I now shall add two 
others from the South and the 
North. 
1. T. elatior Raf. Stem gigantic, 
leaves shorter one inch broad flat, 
base vaginate, end acute, upper 
spike separate cylindric without spa- 
tha, stamens monadelphous at the 
base. From Carolina to Kentucky, 
a large Sp. from 6 to 10 feet high: 
the stem is round, solid and smooth 
as usual. It is the T. latifolia of 
Elliott and the Southern botanists. 
2. T. crassa Raf. Stem humble* 
