Cruciferaceae I 85 
BB. Rarely some of the lower leaves pinnate; basal leaves 45 cm. or less long; 
pod globular; roots with extremely strong radish taste. W. 
R. armoricg A. 8. H. (Horse-radish) 
AA. Flowers yellow; leaves various, mostly pinnate, not extremely large. 
C. Perennial by running rhizomes; stems diffuse. FE. CR. sinuata pubescens; R. 
calycina; RR. columbiae.) R. sinuata A. S. H. (Spreading Yellow-cress) 
CC. Annual or biennial, without rhizomes. 
D. Stems diffuse, branched from the base; pedicels 6—8 mm. long. 
E. Stem hispid; pod oval or globose or ovoid, 3—5 mm. long. E. 
R., hispida Brit. (Hairy-cress) 
EE. Stem glabrous thruout or nearly so; pod globose to oblong, 2—1I2 mm. 
long. W.E. (R. pacifica; R. terrestris. ) 
R. palustris Bes. (Marsh-cress) 
DD. Stems erect, simple below; pedicels 24 mm. long. 
F. Pod curved; leaf-lobes acute. W. E. CR. lyrata; R. polymorpha.) 
R. curvisiliqua Bes. (Arc-cress) , 
FF. Pod straight or nearly so; leaf-lobes obtuse. EF. CR. sphaerocarpa; R. 
fenerrima.)  . R. obtusz, Brit. (Blunt-cress) 
CARDAMINE BITTER-CRESS 
Annual or perennial. Leaves entire or pinnately-lobed or -divided, or pinnately- 
compound. Flowers white or purple, in racemes or corymbs. Petals obovate or narrowly 
spatulate. Stamens 6 or rarely 4. Pod linear, flat, usually erect, not stipitate; valves 
veinless or faintly veined. Seeds in | row in each cell, flat, marginless. (Gk. kardia 
—heart, damao=to strengthen; from the cordial properties of some. ) 
A. Leaves all simple. ‘ 
B. Leaves ovate to elliptic, entire; alpine. C. 
C. bellidifolia L. (Alpine Bitter-cress) 
BB. Leaves cordate to reniform, sinuate to toothed; subalpine. C. E. (C. lyallii.) 
C. cordifolia Gray (Mountain Bitter-cress) 
AA. Leaves or some of them pinnately compound. 
C. Basal leaves simple; stem-leaves 3—5-foliolate. W.C. E. (C. callosicrenata; C. 
vallicola.) C. breweri Wats. (Brewer’s Bitter-cress) 
CC. Basal leaves pinnately compound. 
D. Leaves all 3-foliolate, sometimes 5-foliolate; leaflets coarsely 3—5-toothed. 
WINE C. angulata Hook. (3-leaved Bitter-cress) 
DD. Leaves 3—| 3-foliolate, only the smaller leaves if any 3—5-foliolate; leaf- 
lets coarsely toothed in some species. 
FE. Leaves 7—13-foliolate; leaflets of basal leaves orbicular. W.E. (C. 
pratensis occidentalis; C. occidentalis. ) 
C. pratensis L. (Cuckoo-flower ) 
EE. Leaves 3—7-foliolate. 
F. Flowers 2—3 mm. wide; leaflets petiolulate, lateral ones oblong. W. C. 
E. (C. kamtschatica. ) 
C. parviflore, L. 
FF. Flowers 4—8 mm. wide. 
G. Leaflets petiolulate, roundish; seeds 8—20.° W. C. 
C. oligosperma Nutt. 
GG. Leaflets of the stem-leaves tending to be decurrent along the leaf- 
axis, lateral ones oblong to oval; seeds 20-40. W.C. E. 
C. pennsylvanica Muhl. (Pennsylvania Bitter-cress) 
(Small Bitter-cress) 

