146 
PENTANDRIA, DIGYNIA. 
integerri- 
mum. 
txifoliatum. 
atropurpu- 
reum. 
1, S. leaves doubly ternate, , very entire; leaflets 
entire, somewhat glancous. — Sp. PL 
From one foot to eighteen inches high. Flowers yellow. A 
very rare species in this vicinity. On the north side of a rivu- 
let running from a mill which stands on the road from the up- 
per ferry towards the falls, and about a mile and a half from 
the ferry bridge. The rivulet empties into the Schuylkill, 
near Landsdown. 1 have never found this plant in any other 
locality, and even there it is scarce. Perennial. May, June. 
2. S. radical leaves suborbiculate-cordate, crenate^ 
stem-leaves petiolate trifoliate, upper ones 3- 
parted, umbel with short radii . — JValL 
Thapsia trifoliata, L. 
Cnidium trifoliatum, Cusson. 
Smyrnium cordatum, Walt., Pursh, &c. 
About fourteen inches high. Flowers yellow. In the fields 
near the Schuylkill on the way to the Woodlands — and similar 
situations elsewhere, frequent. Perennial. June, July. 
144. THASPIUM. Nutt. Gen. Am. pi. vol. 1. p. 196. (Umbels 
Ilf era.) 
Fruit subelliptic. Seed convex with 5 alated 
ridges, alse subequal; intervals grooved. 
Involucre none. Involiicell about 3-leaved, 
unilateral? — J\T utt. 
1. T. leaves serrate, radical often subcordate, up- 
permost ternate, middle leaflet conspicuously 
petiolate, leaflets ovate-acute; flowers dark pur- 
ple. Radical leaves mostly entire, upon long 
peduncles ; involucell 3-leaved, unilateral, often 
wanting. Calix 5-toothed, obvious. Petals ob- 
long acuminate, involute, at first greenish. 
Styles filiform, divaricate, long as the fruit. 
Fruit small elliptic, with ten wliitish alated 
ridges. Leaves often elegantly maculated with 
angular paler coloured blotches. — ^utt. 
Smyrnium atropurpureum, Pursh. 
S. trifoliatum, ^ atropurpureum, Bart. Prod. FL 
Ph. p. 38. 
