DICOTYLEDONOUS PLANTS 97 
lyrate, the lower petioled, the upper sessile. Flowers small. Petals 
yellow. Pods linear, spreading, longer than the pedicels. In wet 
places.* 
Vil. CARDAMINE, Tourn. 
Annual or perennial. Rootstock often scaly or bulb-bear- 
ing. Stem erect or ascending, usually smooth. Leaves 
more or less divided. Flowers in terminal racemes, white or 
purple. Petals rather large. Stamens 6. Fruit a linear 
flattened pod. Seeds several, in a single row in each cell.* 
1. C. rhomboidea, DC. Butzsous Cress. Perennial. Root tuber- 
ous. Stem simple, erect, smooth, without runners, 9-18 in. tall. 
Lower leaves long-petioled, ovate, orbicular or heart-shaped, often 
angled or toothed, the upper short-petioled or sessile, lanceolate or 
oblong, toothed or entire. Pedicels 3-1 in. long. Petals white, 
i1in. long. Pod erect, linear-lanceolate, tipped by the persistent 
style. Seeds round-oval. Cool, wet places.* 
2. C. pennsylvanica, Muhl. Birrer Cress. Annual. Stem slender, 
erect, simple, or with a few slender branches, 6-15 in. tall. Leaves 
mostly in a cluster at the base of the stem, pinnately divided, the 
terminal lobe roundish, the lateral lobes narrower, somewhat hairy 
above, stem-leaves nearly linear. Flowers small. Petals white, 
longer ‘than the sepals. Stamens 4. Pods linear, erect on erect 
pedicels, about lin. long. Seeds oval. In wet places.* 
VII. DENTARIA, Tourn. 
Stems naked below, 2—3-leaved above, from a thickish, 
more or less knotted or interrupted rootstock. Flowers 
rather large, in early spring. Pod lance-linear, flattish. Seeds 
in 1 row, wingless, seedstalks broad and flat. 
1. D. diphylla, L. Two-LEAvED TooTHwort, PEPPER Root, 
CRINKLE Root. Rootstock long, often branched, toothed, eatable, 
with a flavor like that of cress or radish. Stem-leaves 2, close 
together, each composed of 3 ovate-diamond-shaped and toothed or 
crenate leaflets; the root-leaf like the stem-leaves. Flowers white. 
Damp woods. 
2. D. laciniata, Muhl. Crow’s Foor. Rootstock short, necklace- 
like. Stem-leaves 3-parted ; root-leaf often absent. Flowers white 
or rose-color, Woods, 
