4Il] FLORA OF BOULDER, COLORADO 263 



Nelson, Aven. Some western plants and their collectors. Proc. 

 Biol. Soc. Wash., 20, 33-40. 



Nelson, Ellas. Revision of western North American Phloxes. 

 1889. 



Osterhout, G. E. New plants from Colorado. Bull. Torr. Bot. 

 Club, 26, 256, 257; 27, 506-508; 28, 644, 645; 30, 236, 237; 32, 611-613. 



Osterhout, G. E. Notes on Colorado plants. Bull. Torr. Bot. 

 Club, 21, 357, 358. 



Osterhout, G. E. Colorado notes. Muhlenbergia, 1, 139-143. 



Pammel, L. H., and Scribner, F. Lamson. Some notes on 

 grasses collected in 1895 between Jefferson, Iowa, and Denver, 

 Colo. Proc. Soc. Prom. Agri. Sci. 17, 94-104. 



Parry, C. C. Catalogue of plants. U. S. Geol. Surv., Ann. Re- 

 port, 4, 484-487. 



Penard, E. An enumeration of the plants collected by M. E, 

 Penard in Colorado during the summer of 1892. Herb, of Colum- 

 bia Coll., Contrib. 75. 



Penard, E. (List of plants collected in Colorado, 1891). Btill. 

 Herb. Boiss. 3, No. 5. 



Porter, T. C. Catalogue of plants. U. S. Geol. Surv. of Wy. and 

 Contiguous Terr., 4, 472-484. 



Porter, T. C, and Coulter, J. M. Synopsis of the flora of Col- 

 orado. U. S. Geol. Surv. of the Terr., Miscell. Pub. 4. 



Ramaley, Francis. Plants of the Florissant region in Colorado. 

 Univ. of Colo. Studies, 3, 177-185. 



Ramaley, Francis, Scientific expedition to northeastern Col- 

 orado, 8. Botany, account of collections made. Univ. of Colo. 

 Studies, 4, 161-164. 



Ramaley, Francis. The silva of Colorado. I. Univ. of Colo. 

 Studies, 4, 109-122; U. ibid., 4, 187-197; III. ibid., 5, 47-63. 



Ramaley, Francis. New Colorado species of Crataegus. Bot. 

 Gaz. 46, 381-384. 



Ramaley, Francis, and Robbins, W. W. Redrock lake near 

 Ward. Univ. of Colo. Studies, 6, 133-168. 



