[52 Carvophyllaceae 
uous or handsome, white to rose-color or deep red. Sepals 2—8, persistent. Petals 
‘316. Stamens many. Styles 2—-8-cleft or -parted. Capsule circumscissile at the 
~ 
very base. Seeds many, black, shining. (Honor of M. Lewis of the Lewis and Clarke 
expedition. ) 
A. Scapes |-flowered, jointed about the middle; involucral bracts 5——7, near the middle 
of the scape; sepals 4—8; petals 1|O—-15. E. 
L. rediviva Pursh 
AA.  Scapes |- 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 mm. or more wide, spatulate to obovate. 
D.  Leaf-margin not hyaline nor crisped; filaments united at base. W. 
L. cotyledon Rob. 
DD. Leaf-margin hyaline, crisped; filaments free. W. 
L. howellii Rob. 
CC. Leaves 8 mm. or less wide, terete or linear-spatulate. 
E. Petals 10—-13 mm. long; leaves not glaucous, flat, linear-spatulate. W. C. 
L. columbiana Rob. . 
EE. Petals about 6 mm. long; leaves glaucous, terete or subspatulate. W. 
L. leana Rob. 
BB. Flowers 1—5, in umbels. 
F. Leaves obovate or linear-oblanceolate. 
G. Leaves obovate; seed granulate. E. 
L. tweedyi Rob. 
GG. Leaves linear-oblanceolate; seed smooth. W. 
L. oppositifolia Rob. 
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 Rob. 
II. Sepals erose; petals red, about 8 mm. long. C. E. 
L. pygmaea Rob. 
HH. Root corm-like, globular; petals about 4 mm. long. C. E. 
L, triphylla Rob. 
CARYOPHYLLACEAE (Silenaceae) Chick-weed Family 
Herbs, annual or perennial, often swollen at the base. Leaves opposite or apparently 
whorled, entire or nearly so; stipules present or none. Flowers perfect or rarely dioicous, 
regular. Sepals 4—-5, persistent, distinct or united. Petals as many as the sepals or 
none. Stamens twice as many as the sepals or fewer, hypogynous or perigynous. Ovary 
1, mostly |-celled, rarely 3—5-celled; styles 2—5; placenta central. Fruit a capsule, 
membranous, opening by valves or teeth. Seeds several or many. 
A. Sepals united into a cup or tube; petals always present, with slender claws; stipules 
none. 
B. Calyx with 10 to many veins; styles 3—5. 
C. Flowers 2.5—4 cm. in diameter; calyx-teeth 2—3 cm. long, foliaceous; petals 
dark purplish-red; styles 5, opposite the petals; leaves linear. 
AGROSTEMMA (p. 153) 
CC. Flowers mostly not so wide; calyx- teeth much shorter, not foliaceous; petals 
mostly not colored as above. 
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