56 SELECTED WESTERN FLORA 



14. LESQUERELLA. Bladdeb-pod. 



Pods globular and inflated, with a semi-transparent partition; 

 seeds flat, in 2 rows, never numerous. Low, rather hoary herbs 

 with yellow flowers. 



1. L. ludoviciana, var. aren6sa, Wats. 



Stem low, slender, decumbent ; leaves linear, the basal forming a rosette, 

 greenish stellate pubescent throughout; pods globose or oval, drooping on 

 recurved pedicels ; cells 4-6-ovuled. Sandy banks, Man. and Sask. 



2. L. Macoiinii, Greene. 



Stems slender, tufted, sometimes branched ; basal leaves oblong to oval, in a 

 dense rosette, stem leaves few, oblanceolate to linear ; densely silvery stellate, 

 pubescent throughout ; pods somewhat broadly ovate. Man. and Sask. 



3. L. alpJna, (Nutt.) Wats. 



Stems very low from a branched rootstook ; leaves all linear, crowded at 

 the base ; pedicels slender, much longer than the pod ; pod ovate, very 

 slightly compressed. Gravelly knolls on top of Cypress Hills (Macoun). 



15. PHYSARIA. 



Resembling LesquereUa except that the fruit is double, the two 

 parts separated by a narrow partition. 



1. P. didymocarpa, (Hook.) Gray. 



Densely whitish, pubescent with stellate hairs; stem slender, spreading; 

 oauline leaves entire, spatulate; root leaves rounded, petioled, more or less 

 toothed or lobed, or entire; flowers pale yellow; fruit inflated, double. 

 Sand or gravel. Rocky Mts. 



XXXIV. CAPPARIDACEiE (Caper Family). 



Herbs with cross-shaped corolla, and in other ways resembling the 

 Cruoifersa, but the stamens are all the same length and the pod 

 is 1-celled with 2 parietal placentas; leaves alternate, palmate. 



1. CLEOME. 



Petals with claws; stamens 6; receptacle produced between the 

 petals and stamens; ovary on a stipe; pod Unear to oblong, with 

 numerous seeds. 



1. C. serrulata, Pursh. Pink Cleome. 



Erect, glabrous, branching; leaves 3-foliate, the lower on long slender 

 petioles, the upper sessile or nearly so; leaflets entire or sparingly serrulate, 

 flowers white or pink, showy; pod on a stipe as long as the pedicel. (C. 

 integrifdlia, T. and G.) Dry and often alkaline soil, Man.-AUa. 



