KEY TO THE SPECIES 21 



3. LEWISIA (Bitter-root) 



Perennial, from thick fleshy roots ; leaves all radical ; petals large and showy. 



1. Le-wisia rediviva Pursh (Resurrection Root). Flowers 2-3 dm. broad, 

 terminating a short scape which is jointed above the middle and bears a scarious 

 involucre of 5-7 bracts. Common on stony ridges, especially northward. The 

 " State flower " of Montana. 



3. CLAYTONIA (Spring Beauty) 



Succulent herbs, with opposite leaves, racemose flowers, 2 persistent sepals, 5 

 petals, and a 3-cleft style. 



• From large (for the plant) deep-set tubers. 



1. Claytonia lanceolata sessilifolia Aven Nelson (Mountain Spring 

 Beauty). A single root-leaf (often wanting), a pair of fleshy, sessile, oblong- 

 lanceolate stem-leaves ; flowers few-several, on a peduncle surpassing the leaves ; 

 sepals subacute; petals spatulate to obovate, entire, pale rose-color with purple 

 veins. Common on moist, rich hillsides. 



* * Annual, with stolons. 



3. Claytonia Chamlssol Ledeb. (Chahisso's Claittonia). Stems weak and 

 slender, decumbent, stoloniferous, rooting at the nodes ; leaves spatulate or 

 oblanceolate, obtuse ; the white flowers racemose, on slender pedicels. In spring 

 bogs and on wet banks. 



XX. CARYOPHYLLACEiE (Pink Family) 



Herbs with opposite entire leaves, usually 5 sepals (united 

 or separate), 5 petals, 10 stamens (sometimes fewer), 2-5 styles, 

 and a 1-celled ovary becoming a pod. 



* Sepals united into a tube or cup ; petals clawed. 



1. Agrostemma. Calyx 10-nerved, 5-lobed ; styles 5. 



2. Silene. Calyx 6-toothed ; styles 3. 



3. Vaccarla. Calyx strongly 5-angled ; styles 2. 



* Sepals distinct ; petals not clawed. 



4. Cerastinm. Sepals, petals, and styles 5 ; petals bifid. 



5. Arenarla. Sepals and petals 5 ; styles 3 ; petals entire. 



1. AGROSTEMMA (Cockle) 



Annual herbs with linear-lanceolate leaves, large red flowers terminating 

 axillary peduncles ; calyx narrowed at the throat, with linear foliaceous lobes ; 

 capsule 1-celled. 



1. Agrostemma Glthago L. (Corn Cockle). Erect, 3-8 dm. high, covered 

 with long soft hairs ; calyx lobes longer than the broad purple-red petals. A weed 

 in wheat fields ; introduced from Europe. 



