POLEMONIACEAE. 281 



4. Polemonium occidentale Greene. (P. coeruleum A. Gray, in part; not 

 L.) In valleys and open woods from Ass. and Alaska to Colo, and Utah. 

 Alt. 6000-9000 ft. Headwaters of Sangre de Cristo Creek; Chambers' 

 Lake ; Indian Creek Pass ; Parlin, Gunnison Co. ; Breckenridge ; Gunnison ; 

 Ironton Park, 9 miles south of Ouray; Durango; Empire; Walden. 



5. Polemonium grande Greene. In the mountains of Colo. Alt. about 

 9000 ft. Near Pagosa Peak. 



6. Polemonium molle Greene. In the mountains of Colo. Alt. 8000-9500 

 ft. Piedra; near La Porte; Eldora to Baltimore. 



7. Polemonium Archebaldiae A. Nels. Mountains of Colo. Berwind. 



8. Polemonium robustum Rydb. In the mountains of Colo., especially along 

 streams. Alt. 8000-10,000 ft Bob Creek, West La Plata Mountains; Keb- 

 lar Pass; Veta Pass; Sangre de Cristo Creek; headwaters of Clear Creek 

 at Dumont; Leroux Creek. 



9. Polemonium foliosissimum A. Gray. In the mountains of Colo, and N. 

 M. Alt. 6000-11,000 ft. Headwaters of Clear Creek; Estes Park, Larimer 

 Co.; La Veta; Veta Pass; Oak Mesa, Delta Co.; Durango; Berthoud Pass; 

 Empire; Willow Creek; Graymont; Sargent. 



10. Polemonium speciosum Rydb. On the highest peaks of Colo. Alt. 

 about 13,000 ft. Pike's Peak; Mt. Garfield; Gray's Peak. 



11. Polemonium Grayianum Rydb. On the higher peaks of Colo. Alt. 

 9000-13,000 ft. Gray's Peak; Graymont; Central City. 



12. Polemonium confertum A. Gray. On the higher mountains among 

 rocks in Wyo. and Colo. Alt. 9000-13,000 ft Mt. McClellan; Pike's Peak; 

 Cameron Pass; Lake City; Gray's Peak; headwaters of Clear Creek; Sangre 

 de Cristo Range; West Spanish Peak; Seven Lakes; near Pike's Peak; near 

 Ironton, San Juan Co. ; mountains above Boreas ; Little Kate Basin, La Plata 

 Mountains ; Ragged Mountain ; Gunnison Co. ; Argentine Pass ; tributaries 

 of South Fork of Cache la Poudre River, Larimer Co.; Beaver Creek; Mt. 

 Abram, Ouray; mountains near Mt. Harvard; Mt Hesperus; Devil's Cause- 

 way; Graymont; Berthoud Pass; Spicer, Larimer Co. 



13. Polemonium mellitum (A. Gray) A. Nels. (P. confertum mellitum A. 

 Gray) On the higher mountains from Wyo. and Nev. to Colo. Alt. 8000- 

 9500 ft. Eldora to Baltimore. 



14. Polemonium Brandegei (A. Gray) Greene. (Cilia Brandegei A. Gray) 

 On the higher peaks of Colo. Alt. 6000-12,000 ft Sierra Blanca; West 

 Spanish Peak; Big Creek Gulch, Routt Co.; mountains between Sunshine 

 and Ward; Wagon-wheel Gap. 



Family 114. HYDROLEACEAE H. B. K. WATER-LEAF FAMILY. 



Ovary i -celled; style 2-cleft; leaf-blades usually toothed, lobed or dissected. 

 Corolla-lobes convolute in the bud ; placentae dilated. 



Stamens exserted ; calyx not enlarged in fruit ; leaves alternate. 



1. HYDROPHYLLUM. 



Stamens included. 



Calyx enlarged in fruit, not appendaged ; leaves opposite. 



2. MACROCALYX. 



