146 



PENTANDRIA, DIGYNIA. 



mtegern- 

 mum. 



trifohatuiu. 



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. I 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 6- 

 parted, umbel with short radii. — Walt. 



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. {Umbel- 

 lifer a.) 



Fruit subelliptic. Seed convex with 5 alated 

 ridges, alse subequal; intervals grooved. 

 Involucre none. Involucell about 3-leaved ; 

 unilateral ? — JWtt. 



atropurpu- 

 reura. 



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 whitish alated 

 ridges. Leaves often elegantly maculated with 

 angular paler coloured blotches. — NutL 



Smyrnium atropurpureum, Pursh. 



S. trifoliatum, /3 atropurpureum, Bart. Prod. Fl. 



Ph. p. 



38. 



