BU^XH-FLOWER FAMILY 149 



long; sepals and petals elliptic, not clawed, greenish white; capsule ovoid. Z, 

 porrifolins Greene. Mountains and canons: Ariz. — se Utah — X.M. — Mex. 



Submont. Jl-Au. 



6. A. vaginata Rydb. Growing in clumps; stem 7-10 dm. high; leaves 

 linear, 3-7 dm. long, 6-10 mm. wide, with numerous veins; inflorescence panicu- 

 ate; bracts linear or subulate, 3-6 cm. long, green, or the upper ovate, white; 

 petals and sepals white, elliptic, 7-8 mm. long, 7-nerved. Loose soil under over- 

 hanging canon walls: se Utah. Son. Au. 



6. TOXICOSCORDION Rydb. Poisoi^ Caaias, Death Camas. 



Bulbif erous glabrous, more or less poisonous perennials, with narrow linear 

 conduplicate leaves and yellowish racemose or paniculate flowers. Flowers per- 

 fect. Petals and sepals bearing an obovate or semiorbicular gland at or above 

 the base of the blade. Ovary wholly superior. Stamens more or less adnate to 

 the base of the petals and sepals; anthers sub-reniform, confluently 1 -celled. 



Seeds numerous. 



T 



Petals and sepals rounded or obtuse at the apex. 



Upper leaves without sheaths at the base; both petals and sepals distinctly clawed 



and subcordate at the base; gland with a thick, toothed margin. 1. T. venenosum. 

 All leaves with distinct sheaths; petals long-clawed and subcordate at the base; 

 sepals subsessule; margin of the gland iU-deflned. 2. T. gramineum. 



Petals and sepals acute or acuminate at the apex; all leaves with sheaths; sepals cuneate 



at the base and short-clawed or subsessile. 

 Leaves less than 5 mm. wide; petals and sepals both cuneate at the base and short- 

 clawed.. 3. T. acutum. 



Leaves over 5 mm. wide. 



Kaceme simple; petals comparatively long-clawed and subcordate at the base. 



4. T.falcalum. 



Raceme branched; petals short-clawed, not subcordate at the base. 



5. T. paniculatum 



yenenosum 



Stem 3-6 



4-6 mm, w 



in fruit elongate; petals and sepals about 5 mm. long; claw about 1 mm. long; 

 blades of the sepals broadly ovate, those of the petals more elliptic-ovate. Zyga- 

 denus venenosus. S. Wats. Z. salinm A. Nels. Hillsides: Mont.— Utah — 

 Calif. — B.C. Plain — Submont, Je-Au. 



2. T. gramineum Rydb. " Stem 2-3.5 dm. high; leaves linear, 1-2 dm. 

 long, 3-9 mm. wide; flowers light yellow; sepals broadly ovate, obtxise; petals 

 ovate, obtuse, subcordate at the base. Z. gramineus and Z. intermedium Rydb. 

 Hills and meadows: Sask, — S.D. — Colo. — Utah — Ida. SvbmonL 



3. T. acutum Rydb. Stem 3-5 dm. high; leaves narrowly linear, scabrous 

 on the margin, about 2 dm. long and 4-5 mm. wide; petals and sepals 4-5 mm. 

 long, both acute at the apex and at the base; glands obovate or cuneate. Z. 

 acutus Rydb. Hillsides: (Black Hills) S.D. Submont. Je^Jl. 



4. T. falcatum Rydb. Stem stout, 3-4 dm. high; leaves scabrous, 1.0-2.5 

 dm. long, 5-8 mm. wide; raceme short, in fruit elongate; petals and sepals about 

 5 mm. long, acute; the former deltoid-ovate, acute at the base; glands semi- 

 orbicular, upper margin toothed, thin and not well defined. Z. falcatus Rydb. 

 Hills and table-lands: Colo.— n N.M. Submont Je-Au. 



5. T. paniculatum (Nutt.) Rydb. Stem stout, 3-6 dm. high; leaves 

 striate, scabrous, 2-4 dm. long, 5-10 mm. wide; flowers panicled, rarely race- 

 mose, yellow; petals and sepals 4-5 mm. long; both ovate or deltate-ovate, 

 acute at both ends and short-clawed; glands semi-orbicular, upper margins 

 toothed, thin and ill-defined. Z. panicvMus S. Wats. On hills: Mont.— N.M. 

 —-Calif.— Wash. Son.^SubmonL My-Je, 



Family 19. JUNCACEAE. Rush Family. 



Grass-like herbs. Flowers perfect, regular, inconspicuous; sepals and 

 petals each 3, similar, scale-like. Stamens 6 or 3, rarely 4 or 5; anthers 

 introrse. Pistil of 3 united carpels; ovary 1- or 3-celled; stigmas 3. Fruit 

 a loculicidal capsule. Seeds 3-inany, often apiculate or tailed. 



