288 CRUCIFERAE 
leaves narrow, broadest at apex, 1 to 3 in. long, margins notched. Stem 
leaves quite narrow, about an inch long, clasping the stem at base. 
Flowers white or pink, small. June-July. 
6. A. glabra, (L.) Bernh. (Fig. 6, pl. 57.) TowrrR MustTarp. 
Stem erect, rarely branching, smooth and light green above; 2 to 4 ft. 
high. Basal leaves 2 to 10 in. long and } to ? in. wide, margins entire 
or with prominent and unequal dentation. Leaves of the rosette hairy, 
those of the stem more or less arrow-shaped, clasping the stem and mostly 
without hairs. Flowers small yellowish-white in terminal cluster; pods 
parallel with and close to the stem. Seeds in 2 rows. May-Aug. 
7. A, laevigata, (Muhl.) Poir. (Fig. 4, pl. 57.) Smoorn Rock- 
cRESS. Whole plant smooth and covered with whitish bloom. Basal 
leaves broad lance-shaped with deep notches, 2 to 3 in. long. Upper leaves 
narrow, clasping the stem, notched at the borders. Pods 3 to 4 in. 
long, spreading and curved downward. Seeds in one row. Flowers green- 
ish-white. Rocky woods. April-May. 
8. A. dentata, T. and G. Toornep Rock-cress. Stem _ sparingly 
branching, 1 to 2 ft. high, slender, plant hairy. Lower leaves egg-shaped 
or pear-shaped, with margins coarsely toothed 2 to 4 in. long. Stem 
leaves oblong, dentate, clasping at base. Flowers greenish-white, small. 
Pods spreading. April-June. 
24. STENOPHRAGMA, Celak. 
An herb resembling Arabis. Covered with stiff forked hairs. Stem 
branched, slender. 
S. Thaliana, (L.) Celak. (Fig. 1, pl. 57.) Mousr-kar Cress. Plant 
ranging from an inch to 16 in. high, with freely branching stem. Leaves 
of the rosette spatula- or pear-formed, dentate; those of the stem broad 
ovate without foot-stalks. Flowers small, white. Southern part of our 
area. April-May. 
25. HESPERIS, L. 
Erect herbs with simple leaves and large clusters of purple or white 
flowers. Pods (siliques), slender, linear, cylindric. Petals purple. 
H. matronalis, L. (Fig. 2, pl, 57). Rocker. DAMer’s VioLeT. Stem 2 
to 3 ft. high. Leaves lance-shaped, borders wavy. Flowers purple, each 
nearly an inch broad. The Rocket of the gardens, naturalized in places. 
Famity III].—CAPPARIDACEAE. Carrer FamiIty 
The characteristics of this family are much the same as those 
of the Crucifers. So nearly related are these two families that 
it is not, in the case of every species, easy to distinguish the one 
family from the other. An important difference is, however, 
found in the fact that while in the flowers of the Crucifers there 
are four long and two shorter stamens, in the Caper family the 
stamens are equal or nearly so. The number of stamens in our 
species is 6 as in the Crucifers, or more than six . 
