YUCCA FAMILY 171 



1. N. Greenei S. Wats. Leaves 6 dm. long, 1 cm. or more wide, rounded 

 and smooth on the back, slightly channelled and striate inside, minutely scab- 

 rous on the margin; peduncle 1-2 dm. long, shorter than the leaves; fruit about 

 6 mm. wide; lobes almost orbicular. Dry mesa: Colo. N.M. Son. 



Family 24. CALOCHORTACEAE. MARIPOSA LILY FAMILY. 



Perennial herbs, with coated corms and narrow leaves. Flowers perfect, 

 regular, showy. Sepals 3, narrow, herbaceous. Petals 3, broad, gland- 

 bearing within near the base and often bearded within, petaloid. Stamens 

 6, hypogynous. Gynoecium of 3 united carpels; ovary 3-celled, many- 

 ovuled; styles united, almost none; stigmas 3, recurved. Fruit a septicidal, 

 3-angled capsule. 



1. CALOCHORTUS Pursh. SEGO LILY, MARIPOSA LILY, 



BUTTERFLY LILY. 

 Characters of the family. 

 Capsule winged. 



Petals 1.5-2.5 cm. long, strongly arched and broadly pitted; leaves single; scape 1-4- 



flowered; bracts lanceolate. 



Stem 1-2 dm. high; gland broad. 1. C. elegans. 



Stem 3-4 dm. high; gland very small. 2. C. apiculatus. 



Petals 2.5-4 cm. long, less arched, not pitted; leaves usually 2; bracts linear. 



Purple spot of the petals lune-shaped, broader than long. 3. C. pavonaceus. 



Purple spot of the petals almost orbicular. 4. C. eurycarpus. 



Capsule not winged. 



Flowers white or lilac. 



Petals abruptly acuminate; gland oblong. 



Petals lilac, purplish, or light blue, with greenish mid vein. 5. C. macrocarpus. 

 Petals cream-colored, tinged with purple and sometimes with a purplish spot. 



6. C. acuminatus. 

 Petals rounded or merely acute at the apex. 



Anthers acute; gland broader than long. 7. C. Gunnisonii. 



Anthers obtuse; gland not broader than long. 



Stem erect, bulbiferous near the base. 8. C. Nuttallii. 



Stem flexuose, not bulbiferous. 9. C. flexuosus. 



Flowers yellow. 10. C. aureus. 



1. C. elegans Lindl. A delicate, slender glabrous plant, 1-2 dm. high; 

 leaf surpassing the scape, 1-2 dm. long, 2-9 mm. wide; scape 1-3-flowered ; 

 petals 'oval or obovate, rounded or acute, 12-20 mm. long, white, tinged with 

 purple, or purplish with whitish margins, densely bearded within and ciliate on 

 the margins; capsule 2 cm. long, 12-15 mm. wide. On shaded hillsides: Wash. 

 Mont. Utah Calif. Submont. My-Jl. 



2. C. apiculatus Baker. A slender glabrous plant, 3-4 dm. high; leaf 

 shorter than the scape, about 2 dm. long, and 8-18 mm. wide; scape 2-3-flowered ; 

 petals obovate, acute or short-acuminate, 2-3 cm. long, white or cream-colored, 

 tinged with purple, bearded within; capsule 2.5 cm. long and about 1 cm. wide. 

 In rich woods: Alta. Mont. Ida. Ore. Submont. Mont. My-Jl. 



3. C. pavonaceus Fernald. A rather stout plant, 3-6 dm. high; leaves 

 shorter than the stem, the lower 2-3 dm. long, 5-12 mm. wide; flowers sub-um- 

 bellate; petals obovate, rounded or acute at the apex, more than 3 cm. long, 

 lilac; anthers tapering somewhat upwards, but obtuse; capsule 25 mm. long, 15 

 mm. wide. C. nitidus Renders., also Purdy, not Dougl. In open meadows: 

 Mont. Wash. Ore. Ida. Submont. Mont. Jl. 



4. C. eurycarpus S. Wats. A strict, glabrous plant, 3-5 dm. high; leaves 

 usually 2, the lower 1-2 dm. long, 2-12 mm. wide, much shorter than the stem; 

 flowers subumbellate, resembling those of the preceding, but gland narrower; 

 petals white or cream-colored with a round purple spot; anthers linear-oblong, 

 obtuse; capsule as in the preceding. C. nitidus S. Wats., not Dougl. C. nitidus 

 eurycarpus Renders. C. umbellatus A. Nels., not Wood. In open meadows: 

 Wyo Mont. Wash. Ore. Submont. Mont. Jl-Au. 



5. C. macrocarpus Dougl. A rather stout and strict plant, 3-5 dm. high; 

 leaves several, linear, revolute, and at last curled, 5-10 cm. long; bract similar; 



