34 SPRING FLORA 



4. A. microphylla Nutt. Stems slender, perennial, several 

 from a woody caudex. Leaves small, sparingly pubescent; those 

 of the base somewhat clustered; stem-leaves auriculate-clasp- 

 ing; entire or denticulate. Siliques ascending. Seeds in 1 

 ro\\; slightly winged or wing-margined. Shaded mountain 

 cliffs, May-June. 



6. STREPTANTHTJS. 



Herbs,, 1-2 ft. high. Basal leaves usually toothed or pinna- 

 tifid. Sepals and petals colored alike; some or all of the 

 former being saccate at the base. Stamens 6: 4 long and 2 

 short, or in 3 sets of 2 each, with the 2 longer pairs more 

 or less united by the filaments. 



1. S. cordatus Nutt. A glaucous perennial with unbranched 

 rather stout stem, and thick elliptical to obovate leaves, those 

 of the stem clasping by the auricled base. Flowers greenish- 

 yellow to purple. Petals clawed and with very narrow limb, 

 once and one-half longer than the sepals. Silique flat; nearly 

 straight. Sunny banks and mountain sides. May-June. 



7. CARDAMINE. Bitter Cress. 



Smooth-stemmed perennials, usually from small tubers or 

 running rootstalks. Leaves all petioled. Flowers in racemes. 

 Silique straight. Seeds in 1 row. 



1. C. cordifolia Gray. Stem erect, unbranched, leafy to the 

 top, 1-3 ft. high. Leaves from round to cordate; wavy-mar- 

 gined or angular-toothed, ciliate; 2-4 in. broad. Flowers 

 white, rather showy. Siliques erect. Around cold springs in 

 the mountains. May -August. 



8. PHYSARIA. Bladder-pod. 



Perennial stellate-pubescent herbs. Leaves spatulate, mostly 

 entire. Flowers yellow, in terminal racemes. Petals longer 

 than the sepals. Styles filiform. Siliques stellate-pubescent. 



1. P. didymocarpa (Hook.) A. Gray. Pale-green; stems sev- 

 eral from a long root: 3-12 inches long. Basal leaves obtuse; 

 rarely few-lobed; narrowed into margined petioles. Stem- 

 leaves nearly sessile, narrowly spatulate. Seeds numerous. 

 In dry soil among rocks. May-August. 



9. CAMELINA. Gold of Pleasure. 



Erect annuals, with entire or toothed clasping sagittate 

 leaves and small dull-yellow flowers in loose racemes. Silique 

 pear-shaped, beaked by the slender persistent style. Seeds 

 several in each cell. 



1. C. saliva Crantz. False Flax. Stem 1-2 ft. high, simple 

 or branching above; leafy; glabrous or sparsely pilose-pubes- 

 cent. A common weed of waste places and grain fields. It is 

 cultivated in Europe for the oil contained in its seeds. May- 

 June. 



