54 ALLIACEAE 



Scape flattened; leaf-blades 5-8 mm. wide. 



Scape much exceeding the leaves in length; stamens 

 about equalUng the petals and sepals. 



25. A. Doiiglassii. 

 Scape low, often exceeded by the leaves; stamens much 

 shorter than the petals and sepals. 

 Stamens two-tliirds as long as the sepals; capsule 



scarcely crested. 26. A. Tolmiei. 



Stamens half as long as the sepals; capsules with 3 

 small crests. 27. A. Cusickii. 



Scape not flattened; leaf-blades 2-4 mm. wide. 



Petals about twice as long as the stamens; capsule not 



crested. 28. A. Brandegei. 



Petals barely exceeding the stamens; capsule with minute 

 thick crests. 29. A. Nivii. 



Ovary and capsule di.«tinctly 6-crested. 



Stamens and styles exserted; petals and sepals acute or obtuse. 



30. A. stellatum. 

 Stamens and styles not exserted; petals and sepals acuminate. 



Leaves more than one. 



Reticulations of the bulb-coats sinuate; leaves shorter than the 

 scape. 

 Bulb-coat tliin, faintly reticulate; leaves 4-10 mm. wide. 



31. A. bisceptum. 

 Bulb-coat thick, strongly reticulate; leaves 1-3 mm. wide. 



32. A. Palmeri. 

 Reticulations of the bulb-coats straight; leaves longer than the 



scapes. 33. A. pleianthum. 



Ijeaves solitary, longer than the scape. 



Petals and sepals long-acuminate, nearly twice as long as the 



stamens. 34. A. cristatum. 



Petals and sepals acute or short-acuminate, slightly longer than 



the stamens. 35. A. netadensc. 



2. DIPTEROSTEMON Rydb. 



Perianth-tube fimnelforra, gradually widening into the limb; bracts broad, conspicuously 

 exceeding the pedicels. 1. D. capitatus. 



Perianth-tube cylindro-campanulate, abruptly widening into the limb; bracts narrow, 

 often exceeded by some of the unequal pedicels. 2. D. pauciflorus. 



3. HESPEROSCORDUM Lindl. i. H. lacteum. 



4. TRITELEIA Dougl. Wild Hyacinth. i. r. grandiflora. 



5. ANDROSTEPHIUM Torr. i. A. bretifloruw. 



Family 21. LILIACEAE. Lily Family. 



Plant with a short rootstock; flowers subumbellate on subterranean pedicels from the 

 crown of the rootstock; petals and sepals united into a long tube. 1. Leucocrinxtm. 

 Plant with bulbs or corms, either leafy-stemmed or scapiferous; petals and sepals distinct 

 or nearly so. 

 Bulb scaly; plant tall, leafy. 



Anthers versatile; petals and sepals oblanceolate, clawed, with a linear nectariferous 



groove. 2. LiLiUM. 



Anthers fixed near the base, slightly if at all versatile ; petals and sepals obovate- 

 oblanceolate, not clawed ; nectary a shallow pit. 

 Stvles distinct from the middle; flowers purple, mottled with yellowish green; 



frmt winged. 3. Fritill.^ria. 



Styles connate to the summit; flowers yellow or orange; fruit not winged. 



4. OCHROCODON. 



Bulb tunicated. 



Anthers strictly basiflxed. 



Leaves 2, basal or nearly so; flowers nodding. 5. ERTTHRONltJM . 



Leaves several, alternate; flowers not nodding. 



Flowers in ours usually solitary; pedicels not jointed; dwarf alpine plant. 



6. LiXJYDIA. 



Flowers racemose; pedicels jointed below the middle; not alpine. 



7. EREXtpcRlNUM . 

 Anthers versatile; scapose plants with racemose flowers. 8. Oa.\.M.\si\. 



1. LEUCOCRINXTM Nutt. Star of Bethlehem, Mountain Lily, Wild 

 Tuberose. l. L. montanum. 



2. LILIUM (Tourn.) L. Lily. 



Flower erect, solitary or subumbellate; petals and sepals unguiculate. 



Leaves linear. " 1. L. umbellatum. 



Leaves lanceolate. 2. L. montanum. 



Flowers several, racemose, nodding; petals and sepals not unguiculate. 



3. L. columbianum. 



