DICOTYLEDONOUS PLANTS 97 



lyrate, the lower petioled, the upper sessile. Flowers small. Petals 

 yeUow. Pods linear, spreading, longer than the pedicels. In wet 

 places.* 



Vn. CARDAHENE, Toum. 



Annual or perennial. Eootstock 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. Bulbous Cress. Perennial. Root tuber- 

 ous. Stem simple, erect, smooth, without runners, 9-18 in. taU. 

 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 J-1 in. long. Petals white, 

 5—5 in. long. Pod erect, linear-lanceolate, tipped by the persistent 

 style. Seeds round-oval. Cool, wet places.* 



2. C. pennsylvanica, MuhL Bitter 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 1 in. long. Seeds oval. In wet places.* 



Vm. DENTARIA, Toum. 



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-lb aved Tooth wort, 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 Foot. Rootstock short, necklace- 

 like. Stem-leaves 3-parted ; root-leaf often absent. Flowers white 

 or rose-color. Woods. 



