LILIACEAE. 63 



late, about equalling the flowers; flowers dark blue or rarely white; perianth 

 lobes unequally spreading, lanceolate, acute, 2 cm. long; capsule oblong-ovate, 

 somewhat 3-angled, 10-12 mm. long; seeds black, shining. Abundant in 

 wet meadows, the bulbs used by the Indians as food. 



82. CLINTONIA. 



Somewhat pubescent herbs, with slender rootstocks and erect 

 simple scapes; leaves few, broad petioled, sheathing, basal; 

 flowers solitary-terminal or umbelled on the erect scapes, bract- 

 less; perianth-segments distinct, equal or nearly so, erect or 

 spreading; stamens 6, inserted at the base of the perianth- 

 segments ; ovary 2- or 3-celled ; ovules 2-several in each cavity. 



Clintonia uniflora (Schult.) Kunth. Rootstock creeping, slender; scapes 

 slender, pubescent, naked or with one or two small linear bracts, 6-10 cm. tall, 

 bearing a solitary white flower or rarely two; proper stem short; leaves 2-5, 

 oblong, acuminate, pubescent beneath, 10-20 cm. long; calyx pubescent on 

 the outside; filaments attenuate from a thicker base, pubescent below; fruit, 

 globose or pyriform, blue. In rich woods, in the mountains. 



83. TRILLIUM. Wake Robin. 



Glabrous erect unbranched herbs, with short rootstocks; 

 leaves 3 in a whorl at the summit of the stem just under the 

 sessile or peduncled, solitary, bractless flower; perianth of two 

 distinct series of segments, the outer 3 (sepals) green, the inner 

 3 (petals) white, pink, purple or sometimes greenish; stamens 6, 

 hypogynous; ovary sessile, 3-6-angled or lobed; ovules several 

 or numerous in each cavity. 



Flowers white, peduncled. T. ovatum. 



Flowers purple, sessile. T. petiolalum. 



Trillium ovatum Pursh. Stems 15-40 cm. tall, from a stout horizontal 

 rootstock, 2-5 cm. long; leaves broadly ovate, acuminate or acute, 5-15 cm. 

 long, nearly sessile; flowers odorous; peduncles erect, 3-6 cm. long; petals 

 lanceolate, acute, white, in age changing through various shades of pink to 

 dark red, exceeding the green sepals; anthers yellow. In woods, in the moun- 

 tains. 



Trillium petiolatum Pursh. St?ms short, usually almost entirely enclosed 

 in sheath-like bracts, arising from a stout oblong upright rootstock; leaves 

 oval or orbicular, 5-15 cm. long, petioled; flowers sessile; petals narrow, dark 

 purple, scarcely longer than the sepals; anthers dark purple. Rich hillsides 

 and copses. 



84. STREPTOPUS. 



Herbs with stout or slender rootstocks; leaves thin, sessile or 

 clasping, alternate, many-nerved; flowers solitary or two to- 

 gether, axillary, slender-peduncled, greenish or purplish, small, 

 nodding; peduncles bent or twisted at about the middle; perianth 

 somewhat campanulate, its segments 6, recurved or spreading, 

 the outer flat, the inner keeled; stamens 6, hypogynous; ovary 

 3-celled; ovules numerous, in two rows in each cavity. 



