CARYOPHYLLACEAE (CHICK-WEED FAMILY) 89 



MM. Leaves 1.2-2.5 cm. long; racemes loose; sepals about 2 mm. long; petals 



2-3 mm. long; seed less than i mm. wide. W. E. M. dichotoma 



LL, Leaves spatulate, 4-8 mm. long; petals o or 2 or 3 or 5, 2 mm. or less long; 



seed I mm. wide. W. H. howellU 



KK. Leaves wide, petioled, not clasping at base; stamens 5; seed closely striate. 



W. M. diffusa 



JJ. Perennial, with slender stolons; leaves very fleshy; petals 8-10 mm. long; 



sepals about 2 mm. long. W. C. E. M. parvifolia (spraddles) 



LEWISIA (Bitter-root) 



Perennial; caudex and root fleshy, perpendicular. Flowers on i-flowered 

 scapes or in panicles with scapose stalks, showy, white to rose color or deep 

 red. Styles 2-8-cleft or -parted. Capsule circumscissile at the very base. 

 Seeds many, — (Honor of M. Lewis of the Lewis and Clarke expedition.) 



A. Scapes i-flowered, jointed about the middle; involucral bracts 5—7, near the middle 

 of the scape; sepals 4-8; petals 10-15. E. L. rediviva 



AA. Scapes i- to many-flowered, jointed at base; involucral bracts 2, near the calyx; 

 sepals 2; petals 3-10. 

 B. Flowers many, in open paniculate racemes. 

 C. Leaves 12 ram. or more wide, spatulate to obovate. 



D. Leaf-margin not hyaline nor crisped; filaments united at base. W. 



L. cotyledon 

 DD. Leaf margin hyaline, crisped; filaments free. W. L. howellil 



CC. Leaves 8 mm. or less wide, terete or linear-spatulate. 



E. Petals 10-13 inni- long; leaves not glaucous, flat, linear-spatulate. W. C. 



L. Columbiana 

 EE. Petals about 6 mm. long; leaves glaucous, terete or subspatulate. W. 



L. leana 

 BB. Flowers 1-5, in umbels. 

 F. Leaves obovate or linear-oblanceolate. 

 G. Leaves obovate; seed granulate. E. L. tweedy! 



GG. Leaves linear-oblanceolate; seed smooth. W. L. opposltifolla 



FF. Leaves linear or lanceolate. 

 H. Root fusiform or conical; petals 8 mm. or more long. 

 I. Sepals entire; petals white, 12-16 mm. long. E. L. nevadensis 



n. Sepals erose; petals red, about 8 mm. long. C. E. L. pygmaea 



HH. Root corm-like, globular; petals about 4 mm. long. C. E. L. triphylla 



CARYOPHYLLACEAE (Chickweed Family) 



Herbs, annual or perennial, often swollen at the base. Leaves 

 opposite or apparently whorled, entire or nearly so. Flowers per- 

 fect or rarely dioecious, regular. Sepals 4-5, persistent. Petals 

 as many as the sepals or none. Stamens twice as many as the 

 sepals or fewer, hypogynous or perigynous. Ovary i, mostly 

 i-celled; styles 2-5; placenta central. Fruit a capsule, membranous, 

 opening by valves or teeth. Seeds several to many. 



A. Sepals united into a cup or tube; petals always present, with slender claws; 

 stipules none. 



