128 



CRUCIFERAE. 



[Vol.. II. 



i. Cardamine pratensis I,. Meadow Bit- 

 ter-cress. Cuckoo-flower. (Fig. 1724.) 



Cardamine pratensis L. Sp. PI. 656. 1753. 



Glabrous, erect or ascending, nearly simple, 8'-2o' 

 high ; roots fibrous. Leaves pinnately divided, 

 lanceolate or oblong in outline, the lower petioled, 

 the upper sessile; divisions 3-7 pairs and an odd 

 one, dentate or entire, those of the basal leaves 

 larger and broader than those of the stem; flowers 

 showy, white or purple, 6"-o." broad; petals three 

 times the length of the calyx; pedicels slender, 4"- 

 6" long in fruit; pods 8 // -i5 // long, \" wide; style 

 less than i" long, thick. 



In wet meadows and swamps, Labrador to northern 

 New Jersey, west to the Pacific coast of British America 

 and Minnesota. Also in Europe and northern Asia. 

 April-May. Called also Ladies' Smock. 



2. Cardamine hirsuta L/. Hairy 

 Bitter-cress. (Fig. 1725.) 



Cardamine hirsttla L. Sp. PI. 655. 1753. 



More or less pubescent, stem erect, usually 

 little branched, slender, 4 / -io / tall. Leaves 

 nearly all basal and forming a rosette, i / -4 / 

 long, pinnate, the terminal segment orbicular 

 or broader than long, entire or few-toothed, 3"- 

 10" broad, the lateral ones 2-5 pairs, usually 

 smaller and narrower; stem-leaves few and 

 mostly borne near the base, their segments lin- 

 ear, or linear-oblong; flowers 2" broad, white; 

 pods linear, about i' long and %" wide, strictly 

 erect on ascending pedicels 2 // -4" long when 

 mature; style almost none. 



In moist places, Pennsylvania to Michigan and 

 North Carolina. Doubtfully native of America. 

 Widely distributed in Kurope and Asia. March - 

 May. 



3. Cardamine Pennsylvania Muhl. 

 Pennsylvania Bitter-cress. 

 (Fig. 1726.) 



Cardamine Pennsylvania Muhl.; Willd. Sp. PI. 3:486. 



1800. 

 Cardamine Pennsyli'anica Krittoniana Farwell, Asa 



('.ray Bull. 6:46. 1894. 



Glabrous or rarely with a few scattered hairs, stem 

 erect, stout or slender, 8'-3 tall, usually much 

 branched, somewhat succulent, leafy up to the ra- 

 cemes. Basal leaves a'-6' long, the terminal seg- 

 ment obovate, oval or suborbicular, usually narrowed 

 at the base, 3 // -io // wide, the lateral 4-8 pairs oblong, 

 oval, or obovate, all toothed, or some of them entire; 

 flowers about 2" broad, white; pods very narrowly 

 linear, 8"-i5" long, less than W wide, erect when 

 mature on ascending or divergent pedicels 2 // -3 // 

 long; style about y^" long. 



In swamps and wet places, Newfoundland to Minne- 

 sota, Florida, Tennessee and Missouri. April-June. 



