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AMMIACEAE. 
2. Carum Gairdneri (H. & A.) A. Gray. In valleys from Alb. and Wash, to 
Colo., Ariz. and Calif.—Steamboat Springs; near Bear River, above Hayden, 
Routt Co. 
5. CICUTA L. Water Hemlock, Musquash Root. 
1. Cicuta occidentals Greene. ( C . maculata Coulter; not L.) In water 
and wet meadows from N. D. and Ida. to N. M. and Calif.—Alt. 5000-8000 ft. 
—Trinidad; Iola; Pagosa Springs; Ft. Collins; Wahatoya Creek. 
6. OREOXIS Raf. 
Involucels linear, entire. 
Oil-tubes more than one in the intervals; plant glabrous. 1. O. humilis. 
Oil-tubes solitary in the intervals; plant usually puberulent. 2. O. alpina. 
Involucels ovate or lanceolate, toothed. 3. O. Bakeri. 
1. Oreoxis humilis Raf. On the higher peaks of Colo.—Alt. 11,000-13,000 
ft.—Pike’s Peak; Bear Creek Divide; West La Plata Mountains; Mount 
Garfield. 
2. Oreoxis alpina (A. Gray) C. & R. ( Cymopterus alpinus A. Gray) On 
the higher peaks of Colo, and Utah.—Alt. 10,000-12,000 ft.—Georgetown; 
headwaters of Clear Creek; Gray’s Peak; mountains above Boreas; mountain 
near Veta Pass; Mount Ouray; Bob Creek Divide, West La Plata Mountains; 
above Beaver Creek; Cameron Pass; Berthoud Pass. 
3. Oreoxis Bakeri C. & R. On the higher peaks of Colo.—Alt. 10,000-13,000 
ft.—Alpine Tunnel; Mt. Hayden; near Pagosa Peak; West Spanish Peak; 
Mount Ouray. 
7. HARBOURIA C. & R. 
1. Harbouria trachypleura (A. Gray) C. & R. ( Cicuta trachypleura S. 
Wats.) In mountains from Wyo. to N. M.—Alt. 5000-10,000 ft.—Foot-hills 
near Golden; Bosworth’s ranch, Stove Prairie; foot-hills west of Ft. Collins; 
foot-hills, Larimer Co.; Horsetooth Gulch; Rist Canon; Howe’s Gulch; gulch 
west of Pennock’s; west of Soldier Canon; mountains between Sunshine and 
Ward; Boulder; Empire. 
8. ZIZIA Koch. Meadow Parsnip, Alexanders. 
1. Zizia cordata (Walt.) Koch. In wet meadows and woods from Conn., 
Sask. and Wash, to Ga., Ala. and Utah.—South Park; Pinkham Creek, 
Larimer Co. 
9. ALETES C. & R. 
Peduncles longer than the leaves; branches of the umbels short. 
Leaflets rounded-obovate in outline; their teeth ovate. 1. A. obovata. 
Leaflets rhombic-cuneate in outline, incised-toothed with lanceolate acuminate 
teeth. 2. A. acaulis. 
Peduncles shorter than the leaves; branches of the umbels nearly as long as 
the peduncles. 3. A. humilis. 
1. Aletes obovata Rydb. On the mountains of Colo.—Alt. about 7000 ft.— 
Golden; Lower Boulder Canon, Boulder Co.; near Morrison. 
2. Aletes acaulis (Torr.) C. & R. ( Dezveya acaulis Torr.; Carum Hallii 
S. Wats.) In the mountains of Colo, and N. M.—Alt. up to 10,000 ft.—Near 
Morrison; South Table Mountain; Golden; gulch south of Boulder; moun¬ 
tains between Sunshine and Ward. 
