DIANDRIA, MONOGYNIA. 
very numerous, on aggregated spikes. Somewhat rare, though 
plentiful where found. Woodlands^ on the bluff of a hill bor- 
dering the Schuylkill ; and in a shady wood near Po^clton. Pe- 
rennial. July and August. 
5. Hemianthus, Nuttall. (Journ. Acad. Nat. Sci. Ph. VoL 
I. p* 119.) ( Lisimachice, J 
Cal. tubular, 4-toothed at the border, cleft on 
the under side. Cor. monopetalous bi-la- 
biate ; tube gibbous, upper lip obsolete 
truncate, lower lip 3-parted, curved inwards 
in an arch, truncate. Siam, with bifid fila- 
ments, the lateral stipes bearing anthers. 
Style, bifid. Cap, 1-locular, 2-valved, many- 
seeded. Seeds shining, ovate. JVutt. 
1. H. Root fibrous. Stem dichotomous, filiform, 
repent, crowded with leaves. Leaves sessile, sub- 
elliptic, or oblong-elliptic, entire, opposite, and 
ternate, obsoletely 3-nerved. Nutt. abr. 
Herpestris micranthra Pursh? 
Icon. Journ. Acad. Nat. Sci. Ph. Vol. I. t. 6. 
fig. 2. 
A minute, creeping, sub-aquatic plant, detected July, 1817, 
first by Mr, Nuttall, and the succeeding day found plentifully 
by him and myself, on the low gravelly shores of the Delaware, 
at low tide, near Kensington. Grows in company with Isoetes 
lacustris, Tillsea. Nutt. Limosella teuifolia. Nm??. Crypta mini- 
ma, Nutt. Eriocolon Havidulum, and Alisma subulata* Pursh. 
Annual, flowers from Jthe last of July to September. 
6. Gratiola L. Gen. pi. 37. Scrophularice.J 
Cal. 5 -parted, often bi-bracteate at the base. 
Cor. tubulose, resupinate, and sub-bilabiate; 
the upper lip, 2-lobed or emarginate; the 
lower 3-cleft and equal. Filaments 4, — 2 
fertile, the other 2, for the most part, sterile. 
Stigma 2-valved, many-seeded. Dissepi- 
ment contrary to the valves. 
mieranthe- 
moides. 
