LILIACEAE.. 95 



Hookera howellii (Wats.) Piper. Scapes 30-90 cm. tall, much exceeding 

 the leaves; flowers blue, in a rather loose umbei; stamens 6, in 2 rows, the fila- 

 ments of the inner ones dilated. 



In open prairies; a rare species found originally in Klickitat County, 

 Washington.. Whidby Island, Gardner; Tacoma Flett. 



108. ALLIUM. Onion. 



Pungent herbs with the characteristic odor of the onion, the 

 leaves and usually scapose erect stem from a coated bulb; leaves 

 narrowly linear, or rarely lanceolate or oblong, sheathing; in- 

 florescence a terminal simple umbel, in the axils of 2 or 3 mem- 

 branous, separate or united bracts; pedicels slender, not jointed; 

 flowers white or pink; perianth-segments 6, separate or united 

 by their very bases; stamens 6, one on the base of each perianth- 

 segment; ovary sessile or nearly so, completely or incompletely 

 3-celled; ovules 1-6 in each cavity. 



Bulbs oblong, cespitose, more or less rhizomatous. 



Rhizome stout; flowers erect. A. validum. 



Rhizome scarcely developed; flowers nodding. A. cernunm. 



Bulbs globose to ovoid, loosely cespitose or solitary, not rhi- 

 zomatous. 

 Bulb coats fibrous, A. geyeri. 



Bulb coats not fibrous, usually reticulate. 



Leaves flat, rather broad; reticulations wanting; 



scape flattened, with crenulate edges. A. crenulatuni. 



Leaves narrow; reticulations polygonal, distinct; 



scape terete. A . acuminatum. 



Alliiun validum Wats. Bulb on the tip of a stout elongated horizontal 

 rhizome; scape 25-60 cm. tall, angled below, 2-edged above; leaves nearly 

 flat, 5-20 mm. broad, about equalling the scape; umbel dense; flowers a deep 

 rose-color; perianth-segments 6-8 mm. long, narrow, acuminate. 



In wet mountain meadows, Washington to California and Nevada. Mount 

 Rainier, Flett. 



Allium cemuum Roth. Bulbs elongated, often clustered on a short 

 rhizome; leaves several, flat or channelled, 2-8 mm. broad; scapes 20-40 cm. 

 high, usually exceeding the leaves; umbel loose, the pink flowers on nodding 

 pedicels; perianth-segments 4-6 mm. long, acute. 



Common on rocks. 



Allium geyeri Wats. Stems slender, 15-30 cm. tall; bulbs elongate, the 

 coats fibrous; leaves 2-4, slender, blunt, 10-20 cm. long; flowers a pale rose- 

 color; bracts broad; perianth segments ovate, acute or acuminate; ovary 

 crested. 



Vancouver Island, Macoun. Common east of the Cascade Mountains. 



Allium crenulatum Wiegand. Bulbs globose or ovoid, the coats not 

 reticulated; leaves flat, curved, 5-10 cm. long, 2-4 mm. wide; scape flattened, 

 with margined often crenulate edges, about as long as the leaves; umbel small, 

 the flowers deep red; perianth segments lanceolate, acute. 



At high altitudes, in the Olympic Mountains, Piper, Flett. Perhaps only 

 a form of A. tolmiei Baker. 



Allium acuminatum Hook. Stems 10-20 cm. tall; bulbs globose, the 

 outer coats finely reticulate; leaves terete, narrow, shorter than the stem; 



