CRUCIFERAE (MUSTARD FAMILY) 435 



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



Apr., May. 



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



leaves 3, whorled or nearly so, the lateral leaflets deeply cleft, glabrous or 

 pubescent, the segments linear to narrowly oblong, 

 conspicuously gash-toothed ; basal leaves, when present, 

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

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

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

 FIG. 768. Var. ^NTEGRA (Schulz) Fernald. Leaves 

 strictly ternate, the lateral leaflets entire or slightly 

 toothed, not cleft. N. Y. to 111. 



6. D. an6mala Eames. Eootstock with pronounced 

 constrictions between the fusiform tuber-like annual 

 segments, deep-seated; stems somewhat pubescent; 

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



Cauline leaves andtubers x y 4 . cauline 2 (rarely 3), subopposite, their leaflets 2-5.5 

 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. Rich 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. bulbbsa (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, 



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

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

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

 ay, June. 



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

 nt, in anthesis 1-2.5 dm. high; root-leaves orbicular or sub orbicular ; stem- 

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

 urple-tinged ; petals rose-purple, 1-1.8 cm. long. ( C. rhomboidea, var. purpurea 



r.) Rich low woods, Ct. to s. Ont. and Wise., s. to Md. and Ky. Apr., 

 ly May. 



* * Fibrous-rooted perennials with l-3-foliolate leaves; southern. 



3. C. rotundifblia Michx. (MOUNTAIN WATER CRESS.) Stems branching, 

 weak or decumbent, making long runners ; root fibrous ; leaves all much alike, 

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

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

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

 town, N. J. ( Willis) to Ky., and southw. along the nits. May, June. Flowers 

 white, smaller than in no. 1. 



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

 'ical leaves kidney- or heart-shaped, with or without a pair of smaller lateral 



