CKUCIFEKAE (^MUSTARD FAMILY) 435 



6-9 mm. long; petals 1-1.8 cm. long. — X. J. and Pa. to Ky., and southw. 

 Apr., May. 



5. D. iaciniata Muhl. Tubers deep-seated ; stems pubescent above; cauline 

 leaves 3, whorled or nearly so, the latn-al leaflets deeply cleft, glabrous or 



pubescent, the segmpnts linear to narrowly oblong, 



conspicuously gash-toothed ; basal leaves, when present. 



similar ; flowers while or purplish ; calyx 6-9 mm. 



long ; petals 1-2 cm. long. — Hich damp woods, w. 



Que. and Vt. to Minn., and southw. Apr., early May. 



Fig. 768. Var. ixtegra (Schulz) Fernald. Leaves 



strictly ternate, the lateral leaflets entire or slightly 



toothed, not cleft. — N. Y. to 111. 



6. D. an6mala Fames. Bootstock with pronounced 



constrictions between the fusiform tnbe-r-like annual 



segments, deep-seated; stems somewhat pubescent; 

 768. D. Iaciniata. leaves 3-foliolate, pubescent on both surfaces ; the 



Cauline leaves and tubers X 1/4. cauUne 2 (rarely o). subopposite, their leaflets 2-0.:^ 



cm. long, short-petiolulate, ovate to rhombic, coarsely 

 and irregularly dentate or even incised or cleft ; basal leaves, when present, 

 similar ; flowers white, tinged with purplish ; sepals 3-4 mm. long ; petals 1-1.2 

 cm. long. — Hich moist woods, Plainville, Ct. (Bissell). May. — Perhaps a 

 hybrid of nos. 1 and 5, with which it grows. 



30. CARDAMINE [Tourn.] L. Bitter Cress. 



* Pod linear, flattened, usually opening elastically from the base ; the valves 

 nerveless and veinless, or nearly so; placentae and, partition thick. Seeds in 

 a single row in each cell, wingless ; the funiculus slender. Cotyledons accum- 

 bent, flattened, equal or nearly so, petiolate. — Mostly glabrous perennials, 

 leafy-stemmed, growing along watercourses and in wet places. Flowers white 

 or purple. (A Greek name, used by Dioscorides for some cress, from its cordial 

 or cardiacal qualities.) 



* Simple-leaved perennials with tuberous base. 



1. C. bulb5sa (Schreb.) BSP. (Spring Cress.) Stems upright from a 

 tuberous base and slender rootstock bearing small tubers, simple, or rarely 

 forking, glabrous, in anthesis 1.5-5 dm. high; root-leaves oblong to cordate- 

 ovate, stem-leaves 5-8. scattered, the lower ovate or oblong and somewhat 

 petioled, the upper sessile, almost lanceolate, all often toothed ; sepals greenish, 

 with white margin; petals white, 7-12 mm. long ; pods linear-lanceolate, pointed 

 with a slender style tipped by a conspicuous stigma; seeds oval. (C rhom- 

 boidea DC.) — Wet meadows and springs, e. Mass. to Minn., and southw. 

 May, June. 



2. C. Douglassii (Torr.) Britton. Similar; stem usually somewhat pubes- 

 cent, in anthesis 1-2.5 dm. high; root-leaves orbicular or suborbicular ; stem- 

 leaves 2-6. the upper border (ovate to oblong), more or less approximate ; sepals 

 purple-tinged ; pHals rose-purple, 1-1.8 cm. long. (C rhomboidea, yrt. purpui-ea 

 Torr.) — liich low woods, Ct. to s. Ont. and Wise, s. to Md. and Ky. Apr., 

 early ^Nlay. 



* * Fibrous-rooted perennials icith \-o^foliolate leaves ; southern. 



3. C. rotundifolia Michx. (MouyrAix Water Cress.) Stems branching, 

 weak or decumhent. making long run}iprs ; root flbrous ; leaves all much alike, 

 roundish, somewhat angled, often heart-shaped at the base, petioled ; pods 

 small, linnar-awl-shaped, equaled or exceeded by the pedicels; style slender; 

 seeds oval -oblong . — Cool shaded springs, Carrollton, N. Y. (Peck) and Middle- 

 town, N. .1. ( Wi'Ui.s) to Ky., and southw. along the mts. May, June. — Flowei-g 

 why;e. siniller than in no. 1. 



4. C. Clematitis Sliuttlw. Glabrous and lax, with slender rootstock; small 

 radical leaves kidney- or heart-shaped, with or withonr a pair of smaller lateraJ 



