148 
TETRADYNAM1A SILIQUOSA. 
1. Officinale. 
E. siliquis spicae ad 
pressis; foliis runcina- 
tis. 
Pods appressed to 
the stem ; leaves run- 
cinate. 
Sp. pi. 3. p. 509* Mich. 2. p. 31. Pursh 2 p. 436. Nutt. 2. p. 68. 
Root annual. Stem 1 — 3 feet high, erect, glabrous, with expanding 
branches. Lower Leaves large and runcinate, the upper ones somewhat 
hastate. Flo?vers on long, very slender racemes, very small. Corolla 
pale yellow, a little longer than the calyx. Pod 6—8 lines long, tapering 
to an acute point, closely appressed to the stem. 
An European plant, partially naturalized in our country. 
Grows along the road side from Canada to Carolina. Pursh. Not 
found in the low country of Carolina. 
Flowers May — June. Pursh. 
ARABIS. 
Siliqua linearis, 
plerumque compressa, 
stigmate subsessili co- 
ronata, valvis venosis. 
Semina serie unica 
disposita. Calyx e- 
rectus. 
1. Canadensis. 
A, foliis lanceola- 
lis, utriiique angusta- 
tis, remote dentatis,ses- 
silibus ; siliquis pen- 
dulis, ancipitibus, fal- 
catis. 
Gen. Pl. 1049. 
Pod linear, general- 
ly compressed, crown- 
ed with the sessile 
stigma, valves veined. 
Seed arranged in one 
row. Calyx erect. 
Leaves lanceolate, 
narrow at each end, 
remotely toothed, ses- 
sile ; pods pendulous, 
compressed, falcate. 
Sp. pl. 3. p. 540. Nutt. 2. p. 70. 
A. Falcata. Mich. 2. p. 31. Pursh 2. p. 437* 
Root perennial. Stem 2 to 4 or 5 feet high, a little hairy near the base. 
Leaves alternate, sessile, pubescent, irregularly toothed. Flowers in long 
