AMMIACEAE. 257 



Idaho Springs; Larimer Co.; Ironton Park, 9 miles south of Ouray; moun- 

 tain near Veta Pass; Pass Creek; Piedra; near Pagosa Peak; Gore Pass; 

 Rico; Leroux Creek, Delta Co. 



2. Pseudocymopterus sylvaticus A. Nels. In woods of Colo, and Wyo. 

 Alt. 8000-12,000 ft. Gulch, Mt. Harvard; Clear Creek Canon near George- 

 town ; Keblar Pass ; Pike's Peak ; Veta Pass ; Hahn's Peak ; mountains, Lari- 

 mer Co.; West Indian Creek; Turkey Creek and tributaries; Veta Mountain; 

 Seven Lakes; Bosworth's; William's Canon above Manitou; above Beaver 

 Creek; Dillon Canon; Empire; mountains between Sunshine and Ward. 



3. Pseudocymopterus tenuifolius (A. Gray) Rydb. (Thaspium montanum 

 tenuifolium A. Gray) In mountain woods from Colo, to N. M. and Ariz. 

 Alt. 8000-10,000 ft. Engelmann Canon; William's Canon; Minnehaha; East 

 Indian Creek; Lake City; vicinity of Como. 



4. Pseudocymopterus multifidus Rydb. (P. montanus multifidus Rydb.) 

 In mountain woods of Colo. Alt. 8000-10,000 ft. Lake City; Ironton, San 

 Juan Co.; Wahatoya Canon; Ironton Park, 9 miles south of Ouray; Seven 

 Lakes. 



5. Pseudocymopterus purpureus (C. & R.) Rydb. (P. montanus purpureus 

 C. & R.) In the mountains of Colo., Utah, N. M. and Ariz. Alt. about 11,500 

 ft Mt. Ouray; Garfield. 



6. Pseudocymopterus anisatus (A. Gray) C. & R. (Cymopterus anisatus A. 

 Gray) On mountains among rocks from Wyo. and Nev. to Colo, and Utah. 

 Alt. 9000-11,000 ft. Headwaters of Clear Creek; Ute Pass, Colorado Springs; 

 Silver Plume; Little Veta Mountain; West Spanish Peak. 



7. Pseudocymopterus aletifolius Rydb. In the mountains of Colo, among 

 rocks. Alt. 6000-10,000 ft. Minnehaha; Cheyenne Mountain.; Pike's Peak; 

 Ruxton; North Cheyenne Canon; Manitou; South Cheyenne Canon. 



26. CYMOPTERUS Raf. 



Umbels dense, globular ; petals white ; involucre wanting. 



Ultimate divisions of the leaves linear or linear-oblong, acutish. 



1. C. acaulis. 

 Ultimate divisions of the leaves short, broadly oblong, obtuse. 



2. C. Parryi. 

 Umbels open ; petals yellow ; involucre present, although often a mere vestige. 



Divisions of the leaves narrow. 3. C. Fendleri. 



Divisions of the leaves broad. 4. C. Newberryi. 



1. Cymopterus acaulis (Pursh) Rydb. (C. glomeratus DC.; C. campestris 

 T. & G.) In dry arid places from N. D. and Ass. to Ark. and Colo. Alt. 

 4000-8000 ft. Larimer Co.; Walsenburg; plains near Denver; mesas near 

 Pueblo ; Cucharas Valley near La Veta ; butte 5 miles southwest of La Veta ; 

 Ft. Collins; Poudre River. 



2. Cymopterus Parryi (C. & R.) Jones. (Coloptera Parryi C. & R.) In 

 dry places from Mont, to Neb. and Colo. McCoy's, Eagle Co. 



3. Cymopteris Fendleri A. Gray. In dry places of Colo., Utah and N. 

 M. Westwater ; Mancos ; Grand Junction. 



4. Cymopterus Newberryi (S. Wats.) Jones. In dry places of Colo., Utah 

 and N. M. Westwater. 



17 



