POLYANDRIA, DI-PENTAGYNIA. 
15 
calices subcampaiiulate, segments lanceolate, 
acute, carinated below almost as long as the 
corolla^ petals with one lateral tooth. — Willd^ 
and Purslu 
H. denticulatum, Walt. 
stem erect, simple ; from a span to twelve inches high, 
four sided. Leaves from a quarter to a half-inch long, and lit- 
tle better than an eighth of an inch broad; oblong-acute and 
very closely sessile or semi-amplexicaule. Flowers the size of 
those of No. 1, and of aline fulvous or copper-colour. LTp the 
Delaware, eight miles from Philadelphia, rare ; Mr. Collins. 
Perennial. June, July. 
4. H. stem erect, ancipital immediately below each adpressum. 
pair of leaves, roundish towards the root. Leaves 
opposite, closely sessile ; lanceolate-obtuse, fine- 
ly punctated with pellucid dots ; leaves of the 
.branches numerous, crowded, sub-linear, ob- 
tuse. Cymes crowded with small acute leaves ; 
flowers terminal and axillary, monogynous, pe- 
tals obtuse, entire. Capsules sub-conoid. B. 
Hypericum, No. 6. Bart. Prod. FI. Phil. p. 74. 
A very elegant species, from one foot to two and an half 
feet high. The branches are divaricating, slender, appresssed 
and frequently indexed or curved downward, and crowded 
with numerous leaves much narrower than the stem leaves, 
less obtuse, and even inclining to acute. From the axills of the 
stem leaves proceeds a cluster of five or six sub-linear obtuse 
leaves, which appear to arise from abortive branches. The 
flowers are yellow, about the size of those of No. 7. I disco- 
vered this new species, about four years since, in a rich, wet, 
or swampy meadow on the lower edge of Landsdown grounds, 
close to the Schuylkill, and not far above Breck’s island. It 
grows there in profusion, but I have not found it elsewhere. 
It stands in my Prodromus, (No. 6.) without a name, not being 
certain at the time I published that work, that it was unde- 
scribed, although I could not find it to fit any of the described 
species. Mr. Collins has also found this plant in this neigh- 
bourhood. Perennial. July. 
5. H. erect, small, small -flowered ; stem four-an- Canadense, 
gled, dichotomous above^ leaves sessile, linear, 
attenuated at the base ; tlie primary branches 
