MELANTHACEAE. 77 



pine; Ruxton Park; Minnehaha; Mount Garfield; mountains above Gray- 

 mont; Medicine Bow Mountain; Silverton. 



■i. Anticlea coloradensis Rydb. In the mountains from Colo, to Utah and 

 N. M.— Alt. 8500-12,000 ft.— Idaho Springs; Leroux Creek; Mt. La Pfeta; 

 Marshall Pass; Steamboat Springs; Estes Park; Middle Park; Pike's Peak; 

 high mountains about Empire; divide betvifeen Arkansas River and Bayou 

 Salade ; foot-hills, Larimer Co. ; above Beaver Creek ; Rist Caiion ; bank 

 of the Michigan ; Gore Pass ; Stove Prairie Hill ; Redstone ; Baxter's ranch ; 

 Buffalo Pass; Medicine Bow Mountains. 



3. TOXICOSCORDION Rydb. Poison Camass, Death Camass, Hogs' 



Potato. 



Petals and sepals rounded or obtuse at the apex ; leaves 3-5 mm. wide. 



I. T. gramineutn. 

 Petals and sepals acute at the apex; leaves over 5 mm. wide. ^. T. falcaium. 



1. Toxicoscordion gramineum Rydb. (Zygadenus venenosus Wats., in part.) 

 Gravelly hillsides from Sask. to Ida. and Colo. — Alt. 5000-7000 ft. — Howe's 

 Gulch. 



2. Toxicoscordion falcatum Rydb. {Zygadenus Nuttallii Coulter, in part; 

 not A. Gray.) Hills and mesas of Colorado. — Alt. 5000-7500 ft. — Fort Col- 

 lins; La Veta; Walsenburg; Los Pinos; Denver; Spring Canon near Cal- 

 loway Ranch; Palmer Lake; Boulder. 



Family 25. JUNCACEAE Vent. Rush Family. 



Leaf-sheaths open; capsules i- or 3-celled, with axial or parietal placentae; seeds 



many. i. Juncus. 



Leaf -sheaths closed; capsule i -celled, with basal placentae; seeds 3. 



2. JUNCOIDES 



I. JUNCUS L. Rushes. 



I. Lower bracts of the inflorescence terete, erect, appearing like a continuation 



of the stem ; inflorescence therefore apparently lateral. 



A. Flowers several in a more or less compound panicle ; seeds apiculate 



(Effusi). 

 Stem light-green, striate when dry, on account of the free hypodermal fibro- 

 vascular bundles ; sepals and petals green ; stamens 3. 



1. /. Miformis. 

 Stem dark-green or at the base purplish, not striate ; sepals and petals dark 

 purplish-brown ; stamens 6. 

 Inflorescence congested ; branches 1-3 cm. long ; petals and sepals acute or 

 short-acuminate, almost equal in length. 2. /. balticus montanus. 



Inflorescence open ; branches 4-8 cm. long ; sepals long-acuminate and much 

 exceeding the acute petals. 3- /• balticus vallicola. 



B. Flowers i-s, of which one is subsessile and the others pediceled (Subtri- 



FLOEl). 



Upper sheath merely bristle-pointed ; petals and sepals with green backs and 

 dark-brown margins. 4- ^- Drummondii. 



Upper sheaths leaf-bearing ; green backs of the petals and sepals less prominent. 

 Sepals and petals linear-lanceolate, light-brown; capsule acute. 



5. /. Parryi. 

 Sepals and petals broadly lanceolate, very dark-brown; capsule retuse. 



6. /. Hallii. 



II. Lower bracts not appearing as a continuation of the stem, or if so channeled 



on the upper side ; inflorescence terminal. 



