LILIACEAE. 59 



Flowers white, the stamens in one row. H. hyacinthina. 



Flowers blue, the stamens in two rows. H. douglasii. 



Hookera hyacinthina (Lindl.) Kuntze. Scapes 30-70 cm. tall; leaves 

 linear-lanceolate, shorter than the stem, 5-8 mm. broad; flowers numerous; 

 perianth open-campanulate, white, each lobe with a green midvein, the tube 

 about half as long as the lobes; stamens in one row, the filaments broadly 

 dilated, equal; capsule subglobose. Low meadows, common. 



Hookera douglasii (Wats.) Piper. Wild Hyacinth. Scape tall; corm 

 globose, the outer coats coarsely fibrous; leaves two or three, shorter than the 

 stem, 2-4 mm. broad; flowers blue, usually numerous, in a dense umbel; 

 pedicels 2-30 mm. long; perianth tubular-campanulate, 2-3 cm. long, the 

 tube longer than the lobes; stamens in two rows, the upper and longer ones 

 on the petals; filaments naked; capsule oblong-ovate, short-stipitate. Plenti- 

 ful on hillsides. 



76. 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, on the bases of the perianth- 

 segments; ovary sessile or nearly so, completely or incompletely 

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



Outer bulb-coat fibrous. A. geyeri. 



Outer bulb-coats not fibrous, with or without reticulations. 

 Flowers white; umbel flat. 



Reticulations narrow, wavy. A. collinum. 



Reticulations none. A. macrum. 



Flowers red; umbel globose or flat. 



Leaves narrow; umbel flat; reticulations distinct, 



polygonal. A. acuminatum. 



Leaves rather broad; umbel globose or flat; reticu- 

 lations wanting or very obscure. 

 Scapes compressed, 8-15 cm. high; umbel flat or 



merely convex. A. cusickii. 



Scapes terete. 



Heads dense, globose; stems 20-40 cm. high; 



perianth segments 8-10 mm. long. A. douglasii. 



Heads convex; stems 15-30 cm. high; perianth 



segments 6-8 mm. long. A. nevii. 



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

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

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

 crested. Low meadows, not common. 



Allium collinum Dougl. Usually cespitose; bulbs globose, the outer coats 

 marked with fine narrow curved reticulations; stems 10-15 cm. high; leaves 

 narrowly linear; flowers white, in flat-topped small umbels; perianth segments 

 5-8 mm. long, acute. High ridges of the Blue Mountains. 



