PURSLANE FAMILY 263 



either 2, opposite, or a few alternate. Flowers in terminal racemes. Sepals 2, 

 persistent. Petals 5. Stamens 5, adnate to the petals at the base. Ovary 

 superior; styles 3, mostly united. Capsule 1-celled, 3-valved. 



Plants with corms; basal leaves few. 



Stem-leaves linear or narrowly lanceolate, 1-ribbed or indistinctly 3-ribbed. 



Corolla orange. 1. C. chrysantha. 



Corolla white or pink. 



Sepals oblong to oval, rounded at the apex; corms usually with 1 or 2 stems. 

 Stem-leaves petioled; corolla white, with rose-colored veins. 



2. C. virginica. 



Stem-leaves sessile; flowers pink. 3. C. rosea. 



Sepals rhombic-ovate; corms with several stems. 4. C. multiscapa. 



Stem-leaves broadly lanceolate, distinctly triple-ribbed. 5. C. lanceolata. 



Plants with a short caudex and a fleshy taproot; basal leaves clustered. 6. C. megarrhiza. 



1. C. chrysantha Greene. Corm 1-1.5 cm. thick, globose; basal leaves 

 usually solitary; blades narrowly oblong or oblanceolate; stem 1-2 dm. high; 

 stem-leaves sessile, inserted below the middle of the stem; sepals rhomboidal or 

 suboval, scarious-margined; petals 8-10 mm. long, broadly oval. C. aurea A. 

 Nels., not O. Kuntze. Wet flats: Ida. Wash. B.C. Mont.Subalp. Je. 



2. C. virginica L. Corm globose, 1-2 cm. in diameter; stems 1-2.5 dm. 

 high; basal leaves usually several; blades linear or narrowly linear-lanceolate, 

 5-12 cm. long; sepals 5-7 mm. long, acute or obtuse; petals oblong, 8-10 mm. long, 

 white, or in the East often pinkish, with rose-colored veins. Rich woods or 

 among bushes: N.S. Ga. -Tex. Colo. -Mont. Plain Mont. Mr-Au. 



3. C. rosea Rydb. Corm 10-15 mm. in diameter; stem about 1 dm. high, 

 slender; basal leaves rare; blades 1-2 cm. long, spatulate; stem-leaves 2-5 cm. 

 long; sepals rounded-ovate, rounded at the apex, about 5 mm. long; capsule 

 shorter than the sepals. Hills and valleys: Colo. 'Utah Wyo. Submont. 

 Mont. My-Je. 



4. C. multiscapa Rydb. Corm 1-1.5 cm. thick, globose; stems 5-15 cm. 

 long; basal leaves usually several; blades narrowly oblong or oblanceolate, 3-5 

 cm. long; stem-leaves sessile, lanceolate, 2-4 cm. long, at the middle of the stem; 

 petals broadly elliptic or oval, 7-10 mm. long, white, with purplish veins. C. 

 multicaulis A. Nels., not O. Kuntze. Gravelly slopes and bottom lands: Mont. 

 Wyo.; apparently also la. Plain Submont. My-Jl. 



6. C. lanceolata Pursh. Corm about 1 cm. thick; stem 0.5-2 dm. high; 

 basal leaves solitary; blade oblong-lanceolate; stem-leaves sessile, 2-5 cm. long; 

 sepals elliptic, 3-6 mm. long, acute or obtuse; petals obovate, from rounded to 

 obcordate at the apex, rose-colored, with purple veins. Rich wet soil: Sask. 

 N.M. Calif. B.C. Subw.ont.Subalp. Ap-Jl. 



6. C. megarrhiza (A. Gray) Parry. Root 1-4 cm. thick; basal leaf-blades 

 spatulate to nearly orbicular, with the wing-margined petioles 2-15 cm. long, 

 fleshy; stem-leaves alternate, linear or narrowly spatulate; sepals ovate, acute, 

 5-6 mm. long; petals pink or white, purple-veined, 6-8 mm. long. Rock-slides, 

 in the higher mountains: Mont. N.M. Utah Wash. Mont. -Alp. Jl-Au. 



3. LIMNIA L. SPANISH LETTUCE, SQUAW LETTUCE, SQUA^ CABBAGE, 

 MINERS' LETTUCE. 



Annuals, or perennials, with slender rootstocks, rarely stoloniferous or bul- 

 biferous in the basal leaf-axils. Basal leaves several; stem-leaves opposite, a 

 single pair, often more or less united. Inflorescence racemose. Sepals 2, some- 

 what unequal, persistent; petals 5, emarginate or obcordate. Stamens 5, op- 

 posite the petals. Styles 3. Capsule 3-valved from the apex; seeds 2-3. 

 Plants with perennial scaly rootstocks; stem-leaves not united. 1. L. asarifolia.' 



Plants annual, or perennial by offsets. 



Stem-leaves free; bractlets present. .... 



Stem-leaves rounded or rhombic-ovate. 2. L. sioinca. 



Stem-leaves linear. 3. L. aremcola. 



Stem-leaves more or less united; bractlets lacking, or only one below the lowest pedicel. 

 Stem-leaves broadly ovate to orbicular. 



Blades of the basal leaves reniform or rhombic to spatulate. 



Racemes elongate; flowers more or less fascicled; seeds about 2 mm long. 



4. L. perfohata. 



