TETRAD YNx\MIA, SILIQUOSA. 
57 
Turritis foliis lanceolatis, dentatis, &c. 
Icon. Pluk. aim. t. 86. f. 8. Gron. Virg. 
Sickle-leaved TFall-crvss* 
A large species, being often two or three feet high. Flow- 
ers white, larger than those of Turritis laevigata. 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, rhomboWea, 
dentate ; tlie lower ones on long petioles, root 
tuberous. — Pers. 
A. rbomboidea, Pers. and Pursh. 
A. bulbosa, Muhl. 
A. amara. Banks. (Pursh.) 
Cardamine rotundifolium, Mich ? 
Bulbous-rooted Wall-cress or Turkeij-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; bi mea- 
dows near rivulets and in ditches ; common. Perennial. March, 
April. 
304. TURRITIS. Gen.pl. 1095. (^Cnicifera.) 
Silique 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- laevigata, 
rate, those of the stem lanceolate-linear, very 
entire, amplexicaule. — Willd. 
Smooth Tower-mustard. 
From one foot to two feet high, 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. 
