94 FOUNDATIONS OF BOTANY 
(c) Pods cylindrical; seeds globular. Flowers of moderate 
size, yellow. Brassica, IV. 
(d) Pods cylindrical. Flowers white. Or pods ovoid or 
ellipsoid. Flower yellowish. Aquatic plants, or 
growing in wet soil. Nasturtium, VI. 
Cc. 
Pods elongated, often jointed, tapering toward the tip, never splitting 
open. Raphanus, V. 
D. 
Pods flattened parallel to the partition, splitting open when ripe. 
(a) Wild species leafy-stemmed; growing in or near water. 
Pods linear. Cardamine, VII. 
(b) Wild species; stems naked below, bearing only 2 or 3 
leaves. Pods lanceolate. Dentaria, VIII. 
(c) Wild species ; leafy-stemmed ; growing on dry ground 
or rocks. Pods linear; seeds usually winged or 
margined. Arabis, X. 
(d) Cultivated species. Pods round or roundish. 
Lobularia, XI. 
(e) Cultivated species, covered with a grayish down of 
star-shaped hairs. Pods cylindrical. 
Matthiola, XII. 
I. LEPIDIUM, Tourn. 
Annual; stem erect, or sometimes diffuse. Leaves entire, 
toothed, or pinnately divided. Flowers in a terminal raceme, 
small, white. Petals short, sometimes wanting. Stamens 2, 
4, or 6. Pod rounded or obcordate, flattened contrary to the 
partition.* 
1. L. virginicum, L. PEPPERGRASS, Brrps’ PEPPER, TONGUE- 
GRAss. Stem erect, smooth, much branched, 1-2 ft. high. Lower 
leaves obovate in outline, pinnately cut with dentate lobes; upper 
leaves lanceolate, dentate, slightly downy. Flowers on slender 
pedicels, petals present, sometimes reduced in the later flowers. 
Stamens 2. Pod round. A weed growing in waste places.* 
