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 ; jNIt. 

 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 mellitmn 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. {Gilia 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. 



