26G GENTIANACEAE. 



a. Amarella heterosepala (Engelm.) Greene. (Gentiana hcterosepala 

 Engelm.) In damp ground in Utah and Colo. — Alt. about 9000 ft. — Near 

 Pagosa Peak ; divide road to Steamboat Springs ; western Gunnison Co. 



3. Amarella strictiflora (Rydb.) Greene. {Gentiana amarella stricta S. 

 Wats.; G. strictiflora Rydb.) On hillsides and damp places from Sask. and 

 Alaska to Colo, and Calif. — Alt. 7500-12,000 ft. — Empire; mountains between 

 Sunshine and Ward; Gunnison; Lake John; North Park; Mt. Harvard; 

 Ribbon Lake ; Estes Park, Larimer Co. ; Seven Lakes ; Chambers' Lake ; 

 Bottomless Pit, Pike's Peak; headvi'aters of Clear Creek near Empire; Bergen 

 Park ; South Park, southeast of Jefiferson ; Baxter's ranch. 



4. Amarella scopulorum Greene. (Gentianella dementis Rydb.) In damp 

 places from Mont, and S. D. to Colo, and Ariz. — Alt. 9000-12,000 ft.— 

 Clear Lake ; Idaho Springs ; Palsgrove Cafion ; Ruxton Dell ; Minnehaha ; 

 Middle Park; below Half-way House, Pike's Peak; Graymont ; Hamor's 

 Lake above Durango; Artist's Glen near Pike's Peak; Pike's Peak; Silver 

 Plume; headwaters of Clear Creek; Bosworlh's ranch. 



5. Amarella plebeja (Cham.) Greene. (Gentiana plebeja Cham.; G. 

 Amarella acuta A. Gray; not Hook.) In wet places from Mackenzie and 

 Alaska to Colo, and Calif. (?). — Alt. 8000-10,000 ft. — Georgetown; Middle 

 Park, near Cozzens; Marshall Pass; Grand Lake; Deep Creek Lake; north 

 of Steamboat Springs ; vicinity of Pine Grove. 



Amarella plebeja Holmii (Wettst.) Rydb. {Gentiana plebeja Holmii 

 Wettst. ; G. Amarella nana Engelm.) A low alpine variety. — Alt. 10,000- 

 12,000 ft. — Caribou; Buffalo Pass; Breckenridge. 



5. CHONDROPHYLLA (Bunge) A. Nels. 



Leaves and calyx-lobes with broad scarious margins ; the capsule long-stipitate 

 and at last exserted from the corolla. i. C. Fremontii. 



Leaves and calyx-lobes slightly scarious-margined ; capsule short-stipitate, not 

 exserted. 2- C. americana. 



1. Chondrophylla Fremontii (Torr.) A. Nels. {Gentiana humilis Engelm.; 

 not Stev. ; G. Fremontii Torr.) On alpine wet brook-banks in Wyo. and 

 Colo. — Alt. 7000-10,000 ft. — Gunnison; headwaters of Sangre de Cristo Creek; 

 headwaters of Clear Creek ; Georgetown ; Como. 



2. Chondrophylla americana (Engelm.) A. Nels. {Gentiana prostrata 

 Hook.; not Henke. ; var. Americana Engelm.) In wet places along streams 

 from Alb. and Alaska to Colo.— Alt. 10,000-12,000 ft. — Wilson, San Miguel 

 Co.; "Colorado"; northeast of Boreas. 



6. DASYSTEPHANA Adans. Closed Gentian. 



Testa of the seeds lamellose-rugose ; the lamellae white, forming hexagonal 

 areolas ; basal leaf-rosette remaining at flowering time. i. D. Romanzovii. 



Testa of the seeds smooth, but often produced into wings ; basal rosette none. 

 Floral leaves more or less broadened and more or less scarious ; seeds usually 



wingless. 2. D. Parryi. 



Floral leaves narrow, not scarious ; seeds winged. 



Leaves all except the floral ones ovate, oblong or lanceolate. 

 Calyx-lobes well developed ; calyx-tube truncate at the apex. 



3. D. afUnis. 

 Calyx-lobes none or minute ; calyx-tube irregular, more or less lobed or 

 cleft. 4. D. Forwoodii. 



