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TETRADYNAMIA, SILIQUOSA. 57 
Turritis foliis lanceolatis, dentatis, &c. 
Icon. Pluk. alm. t. 86. f. 8. Gron. Virg. 
Sickle-leaved Wall-cress. 
A large species, being often two or three feet high. Flow- 
ers white, larger than those of Turritis levigata. Siliques ar- 
cuate, rigid, a little better than an eighth of an inch broad, 
with a line on each side. On the rocks bordering Schuylkill, 
not common. Perennial. May. 
4. A. leaves glabrous, rhomboid, repand-obsolete, riomboidea. 
dentate ; the lower ones on long petioles, root 
tuberous.— Pers. 
A. rhomboidea, Pers. and Pursh. 
A. bulbosa, Muhl. 
A. amara, Banks. (Pursh.) 
Cardamine rotundifolium, Mich? 
Bulbous-rooted Wall-cress or Turkey-pod. 
From ten to fifteen inches high. Flowers large, white ; 
root tuberous. Along the marshy borders of the Delaware : 
on the borders of the Schuylkill and Wissahickon; in mea- 
dows near rivulets and in ditches; common. Perennial. March, 
April. 
304. TURRITIS. Gen. pl. 1095. ( Crucifere.) 
Siliqgue elongated, ancipital; valves nervose 
or carinate. Seeds disposed in a double se- 
ries. Cotyledones accumbent.—R. Brown. 
1. T. leaves glabrous, radical ones obovate, ser- !*vigat. 
rate, those of the stem lanceolate-linear, very 
entire, amplexicaule.— Willd. 
Smooth Tower-mustard. 
From one foot to two feethigh, very smooth. Flowers yel- 
lowish-white, small. The plant resembles Arabis falcata. It 
differs however, strikingly in fruit. Siliques from three to four 
inches long, very numerous, quite flat, straight and little more 
than one-sixteenth of an inch broad. On the high shady banks of 
the Schuylkill, east side, about a mile or two south of the falls. I 
have found it sparingly on the west side above the falls, on 
rocks; rare. Biennial. April, May. 
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