COLORADO BOTANY 73 



(Wheeler Report), Vol. VI, pp. 1-15. [An account of the flora of the open ground, 

 the flora of the mountains, the timber and agricultural resources.] 



Rotheock, J. T., "Notes on Economic Botany," U. S. Geog. Survey West of the 100th 

 Meridian (Wheeler Report), Vol. VI, pp. 41-53. 



, "Catalogue of Plants," U. S. Geog. Survey West of the 100th Meridian (Wheeler 



Report), Vol. VI, pp. 53-352, 31 plates. [Plants collected in Nevada, Utah, Colo- 

 rado, New Mexico and Arizona with descriptions of those not contained in Gray's 

 Manual of the Northern U. S., and Vol. V. Geol. Explor. of the 40th Parallel. Dr. 

 Rothrock was assisted by the following botanists: Sereno Watson, George Engel- 

 mann, Professor Thos. C. Porter, M. S. Bebb, Wm. Boott, George Vasey, Professor 

 D. C. Eaton, Thos. P. James and Professor Edward Tuckermann.] 



Rydberg, Per Axel. Collected in August, 1895, with C. L. Shear chiefly grasses and 

 forage plants. Most of the time was spent in the Clear Creek district. Other collec- 

 tions by Dr. Rydberg in Colorado were made in 1901, around Colorado Springs, 

 Pueblo, Walsenberg, La Veta, Spanish Peaks, Huerfano Valley and Greenhorn 

 Mountains. In 1890 and 1891 collections were made at Julesburg. 



Rydberg, P. A., "Notes on Potentilla, I," Bull. Torr. Bot. Club, Vol. XXII pp. 244- 

 49, 1896. [Two species from Colorado.] 



, "Notes on Potentilla, II," Bull. Torr. Bot. Club, Vol. XXIII, pp. 259-65, 1896. 



[Two species from Colorado.] 

 -, "Notes on Potentilla, III," Bull. Torr. Bot. Club, Vol. XXIII, pp. 301-6, 1896. 



[Two Colorado species.] 

 , "Notes on Potentilla, IV," Bull. Torr. Bot. Club, Vol. XXIII, pp. 394-99, 1896. 



[Five species from Colorado.] 

 , "Notes on Potentilla, V," Bull. Torr. Bot. Club, Vol. XXIII, pp. 429-35, 1896. 



[Describes three species from Colorado.] 

 , "Notes on Potentilla, VI," Bull. Torr. Bot. Club, Vol. XXIV, pp. 1-14, 1897. 



[Three species from Colorado.] 

 , " Antennaria dioica and its North American Allies," Bull. Torr. Bot. Club, Vol. 



XXIV, pp. 299-304, 1897. [Antennaria parvifolia and Antennaria microphylla are 



found in Colorado.] 

 , "Notes on Two Western Plants," Bull. Torr. Bot. Club, Vol. XXIV, pp. 90-92, 



1897. [Account of Lonicera glaucescens and Geum (Sieversia) turbinalum. Geunt 



turbinatum is found in the higher Rockies of Colorado.] 

 , "A Monograph of the North American Potentilleae," Memoirs Depart. Bot. of 



Columbia Univ., Vol. II, 1898. [Includes collections from Colorado, 112 plates, 



pp. 223.] 

 , "Cespitose Willows of Arctic America and the Rocky Mountains," Bull. N. Y. 



Bot. Garden, Vol. I, pp. 257-78, 1896-1900, issued 1899. 

 , "New Species from the Western United States," Bull. Torr. Bot. Club, Vol. XXVI, 



pp. 541-46, 1899. [Allium neo-mexicanum collected in south Colorado.] 



, "Composition of the Rocky Mountain Flora," Science, 1900. 



, "Studies on the Rocky Mountain Flora." [Many new species from Colorado.] 



I. Bull. Torr. Bot. Club, Vol. XXVII, pp. 169-89, 1900; II, ibid., pp. 528-38; III, 

 ibid., pp. 614-36; IV, ibid., Vol. XXVIII, pp. 20-38, 1901; V, ibid., pp. 266-83; 

 VI, ibid., pp. 499-513; VII, ibid., Vol. XXIX, pp. 145-60, 1902; VIII, ibid, pp. 



