10 KEY TO THE SPECIES 



2. ALLIUM (Onion) 



Strong-scented herbs, with coated bulb and a basal cluster of leaves ; stem 

 naked, bearing a terminal umbel of small flowers ; perianth of distinct (or nearly 

 SO) divisions and a 3-lobed pod. 



1. Allium cernuuiu Roth. (Nodding Wild Onion). Stems slender, from 

 deep-seated, clustered bulbs with long necks, S-4 dm. high ; leaves flat, 2-4 mm. 

 wide; umbel nodding; pedicels slender, long; flowers rose-tinted. Occasional; in 

 the valleys among- the foothills. 



2. Allium reticulatum Don. (Wild Onion). Bulb rather large, the coats 

 strikingly fibrous-reticulate ; stem 1-2 dm. high ; leaves narrow, channeled ; the 

 flowers white or pinkish, on short pedicels, each bearing two crests. In sandy 

 soil of plains and valleys. 



3. LILIUM (Lily) 



Bulbs of thick scales ; Rtems simple, with scattered or whorled leaves, flowers 

 1-several, large, showy, erect or drooping, funnel-form or bell-shaped ; stamens 

 and style long ; anthers versatile. > 



1. Liilium uiontanum Aven Nelson (Mountain Lily. "Tiger Lily''''). 

 Bulb depressed-globose, of thick fleshy scales ; stem 3-4 dm. high ; leaves smooth, 

 dark green, alternate except the uppermost whorl of 5-7, lanceolate, sessile ; the 

 segments of the single erect flower elliptic-oblong, tapering to both ends, brownish- 

 red to orange-red, the base of the inner face dotted with purplish-black spots ; 

 stamens and stigma purplish ; capsule oblong-cylindric. In moist thickets near 

 mountain streams. 



4. FRITILLARIA 



Much like Lilium ; flowers small, bell-shaped, nodding, leafy-bra'cted ; anthers 

 not versatile. 



1. Fritillaria atropurpurea Nutt. (Purple Fritillaria). Bulbs from 

 thick, nearly rice-shaped scales ; stems 1-2 dm. high ; leaves scattered or whorled ; 

 flowers 1^, dull-purple and mottled; stamens shorter than the narrowly oblong 

 perianth segments ; capsule erect, obovate, acutely angled. 



5. ERYTHRONIUM (Dog-tooth Violet) 



Herbs from deep-set bulbs; leaves only 2, smooth, flat, shining, sheathing the 

 base of the naked stem ; flowers 1 or more, nodding ; perianth of six separate and 

 recurved segments. 



1. Erythronium parviflorum (Wats.) L. N. Goodding (Colorado Dog- 

 tooth Violet). Bulb slender, 3-5 cm. long ; scape slender ; leaves oblong, taper 

 ing to both ends ; flowers usually only 1, nodding, bright yellow, the segments 2-3 

 cm. long ; capsule oblong to oval, 2-3 cm.' long. Moist slopes in the mountains. 



6. CALOCHORTUS (Mariposa Lily) 



Herbs from coated corms ; stems slender, branching ; leaves linear ; flowers 

 few, showy, open campanulate, the 3 outer segments green and sepal-like, the 3 

 inner petaloid, with densely hairy glands ; capsule oblong, obtusely angled. 



* Anthers obtuse. 



