2r)4 AMMIACEAE. 



1. Aulospermum longipes (S. Wats.) C. & R. (Cymoptenis longipes S. 

 Wats.) In dry soil from Wyo. to Colo, and Utah. — Yampa River. 



2. Aulospermum angustum Osterhout. In dry places of Colo. — Steamboat 

 Springs; Ilaydcii. 



3. Aulospermum planosum Osterhout. In dry places of Colo. — Minturn ; 

 Steamboat Springs. 



4. Aulospermum purpureum (S. Wats.) C. & R. iCymoptcrus purpureus 

 S. Wats.) In dry places from Colo, and Utah to X. M. and Ariz. — Alt. 

 6000-7000 ft. — Mancos ; Cimarron; Durango; Ridgway. 



14. PHELLOPTERUS Niitt. 



Peduncles, even in fruit, shorter than the leaves ; fruit 6-8 mm. long. 



I. P. montanus. 

 Peduncles, at least in fruit, equalling or exceeding the leaves ; fruit over 8 mm. 

 long. 

 Involucels 1-3-nerved. 2. P. purpurascens. 



Involucels 5-9-nerved. 3- P- camponim. 



1. Phellopterus montanus Nutt. (Cymoptenis montanus T. & G.) In dry 

 places from S. D. and Wyo. to Ark. and Colo. — Alt. 4000-7000 ft. — Colorado 

 Springs ; Ft. Collins ; Pueblo ; New Windsor ; Denver. 



2. Phellopterus purpurascens (A. Gray) C. & R. (Cymopterus montanus 

 purpurascens A. Gray) In dry places from Colo, and Utah to Tex. and Ariz. 

 — In Colorado it is represented only by the var. Eastwoodiae (Jones) C. & R. 

 which is more robust, with more open inflorescence and narrower wings to 

 the fruit. — Alt. 6000-8000 ft. — Hermosa ; Mancos ; Cerro Summit. 



3. Phelopterus camporum Rydb. Dry mesas of S. Colo. — Alt. about 5000 

 ft. — Mesas near Pueblo. 



15. PTERYXIA Nutt. 



I. Pteryxia foeniculacea Nutt. (Cymopterus foeniculaceus T. & G.) In 

 dry places from Ida. and Wash, to Colo., Utah and Ore. — Alt. about 8500 ft. — 

 Columbine ; Steamboat Springs. 



16. OROGENIA S. Wats. Turkey Pe.\. 



I. Orogenia linearifolia S. Wats. On mountain ridges from Ida. and Wash, 

 to Colo, and Ore. — Mancos; Rabbit-Ears. Routt Co.; Steamboat Springs. 



17. SIUM L. W.\TER Parsnip. 



I. Sium cicutaefolium Gmelin. In water from Newf. and Mackenzie to 

 Va. and Calif.— Alt. 4000-8000 ft. — Parlin, Gunnison Co.; Gunnison; San 

 Luis Valley. 



18. OXYPOLIS Raf. 



I. Oxypolis Fendleri (A. Gray) Heller. (Archemora Fendleri A. Gray) 

 Along brooks and in springy places from WVo. to N. M. — Alt. 8000-11,000 ft. 

 — Headwaters of Clear Creek; Upper Corral Creek; Idaho Springs; Marshall 

 Pass; Ruby; Robinson; near Pagosa Peak; East Indian Creek; mountain 

 near Veta Pass; headwaters of Sangre de Cristo Creek; Grayback mining 



