Vor. II.]J MUSTARD FAMILY. 131 
1o. Cardamine bulbdsa (Schreb.) B.S.P. Bulbous Cress. (Fig. 1733.) 
Arabis bulbosa Schreb.; Muhl. Trans. Am. Phil. 
Soc. 3:174. 1793. 
Cardamine rhomboidea DC. Syst. Veg. 2: 246. 1821° 
Cardamine bulbosa B.S.P. Prel. Cat. N. Y. 4. 1888 
Glabrous, erect from a tuberiferous base, sim- 
ple or sparingly branched above, 6/-1%4° high. 
Basal leaves oval, or nearly orbicular, 1/-134’ 
long, sometimes cordate, angled or entire, long- 
petioled; stem-leaves sessile or the lower peti- 
oled, oblong or lanceolate, dentate or entire, 1/— 
2’ long; pedicels 4’’-12’’ long; flowers white, 
5/’-7’’ broad; petals three or four times the 
length of the calyx; pods 1’ long, erect, linear- 
lanceolate, narrowed at each end; style 1//-2// 
long; stigma prominent; seeds short-oval. 
In wet meadows and thickets, Nova Scotia to 
southern Ontario and Minnesota, south to Florida 
and Texas. Ascends to 2000 ft. in Virginia. April- 
June. 
11. Cardamine rotundifolia 
Michx. Round-leaved or Amer- 
ican Water-cress. (Fig. 1734.) 
Cardamine rotundifolia Michx. FI. Bor. 
Am, 2:30. 1803. 
Weak, ascending or decumbent, form- 
ing long stolons; roots fibrous. Basal 
leaves and stem-leaves similar, the lower 
petioled, the upper sessile, ovate, oval, 
or orbicular, obtuse, undulate angled or 
entire, thin, the base rounded, truncate 
or cordate; pedicels 6’/-12’’ long in 
fruit; flowers white, 2’’-3/’ broad; pods 
linear, 7//-8/’ long, %4’’ wide, pointed; 
pedicels 4//-8’’ long; style 1/” long; 
stigma minute; seeds oblong. 
In cold springs, New Jersey to Ohio, 
south to North Carolina and Kentucky. 
Ascends to 3500 ft. in Virginia. May-June. 
19. DENTARIA L.. Sp. Pl. 653.1753. 
Perennial herbs, with fleshy horizontal scaly or toothed rootstocks, erect mostly un- 
branched stems leafless below, 3-divided or palmately laciniate petioled leaves, and corym- 
bose or short-racemose white rose-colored or purple flowers. Petals much longer than the 
sepals. Stamens 6. Style slender. Silique linear, flat, elastically dehiscent from the base, 
its valves nerveless or with a faint midnerve; stipe none. Seeds in I row in each cell, thick, 
oval, flattened, wingless; cotyledons thick, nearly or quite equal, accumbent. [Greek, tooth, 
from the tooth-like divisions of the rootstock. ] 
About 15 species, natives of the northern hemisphere. Besides the following, some 7 others 
occur in the western parts of North America, The species are called Pepper-root and Tooth-root, 
from their pungent and toothed rootstocks. 
Basal leaves and stem-leaves similar. 
Leaf-divisions lanceolate or oblong, lobed or cleft. 1. D. laciniata. 
Leaf-divisions ovate or ovate-oblong, crenate or lobed. 
Stem-leaves 2, opposite, or close together; rootstock continuous. 2. D. diphylia. 
Stem-leaves 2-5, alternate; rootstock jointed. . D. maxima, 
Divisions of the stem-leaves linear or lanceolate; those of the basal leaves ovate, much broader. 
4. D. heterophylla, 
