35 
CRUC1FERJE. (MUSTARD OR RADISH FAMILY.) 
lanceolate, obtuse, irregularly cut or cleft into narrow teeth, the lateral 
ones deeply 2-lobed.— Rich soil along streams, W. New Engl, to 
1 enn. and Ohio. May. — A span high : raceme scarcely longer than 
the leaves. Flowers pale purple. Root-leaves much dissected. 
4. D. heteropliylla, Nutt. (Dwarf Tooth wort.) Root- 
stock necklace-form , obscurely toothed ; stem-leaves 2 or 3, small, alter¬ 
nate, 3-parted, the leaflets lanceolate and nearly entire ; root-leaves 
of 3 round-ovate obtuse somewhat toothed and lobed leaflets._W. 
Pennsylvania and southward. May. —A span high : stem-leaves V 
long Flowers few, purple. 
ArABIS, L. Rock Cress. 
Pod long and linear, flattened, the valves 1-nerved in the mid¬ 
dle. Seeds in a single row in each cell, usually margined or wing- 
e< * # Flowers white or rose-color. (Name from the country Ara¬ 
bia. Linn., PJal. Bot., § 235.) 
* Seeds narrowly margined or marginless. 
*•“ Root perennial. 
Lam. (Alpine Rock Cress.) Stem nearly 
upr.ght, sometimes branched, glabrous, root-leaves petioled, pinnati- 
.those °f the stem oblong-linear, entire; pods spreading, straight; 
*eds with a narrow margin. _ Shore of L. Superior and northward 
Low, with the aspect of No. 2. w ara. 
**“ *** Root bie ™ial or sometimes annual. 
. A * L (American Rock Cress.) Diffusely branch¬ 
ed, low, glabrous except the lyrate-pinnatifid radical leaves- stem 
leaves spatulat, or lanceolate, tapering to the base, the upper entire- 
petals (white) twice the length of the cilw • ; * ure » 
pointed ,cM a short style; seeds marginless -Rocks "^readmg. 
Stems 4t-10' high. Radicle often oblique A P»‘-June. 
<*-.> 
equally and sharply toothed ; those of the stem ° btU *?’ 
valves very obscurely nerved. S ’ Pods V >ong: 
4 -A, patens, Sulliv. (Open Hairy Rnnr r* v ^ 
* g ’ f ° dSSpTeaUln S<‘nd earring upwards, tipped with 
