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Contributions from the Herbarium of Columbia College. 



[The numbers omitted from this list are out of print. ] 



Volume I. 



No. 6. An Enumeration of the Plants Collected by Dr. H. H. Rusby in South 



America, 1886-1887. By N. L. Brit ton $1.00 



No. 7. The Genus Hicoria of Rafmesque. By N. L. Britton (1888), .25 cents. 

 No. 11. Preliminary Notes on the North American Species of the Genus Tissa 9 



Adans. By N. L. Britton (1889), 25 cents. 



No. 17. The Flora of the Desert of Atacama. By Thos. Morong (1891), . 25 cents. 

 No. 20. New or Noteworthy North American Phanerogams, IV. By N. L. Britton. 



(1891), 25 cents. 



No. 21. Notes on the North American Species of Eriocauleae. By Thos. Morong 



(1891),, 25cents. 



No. 22. New or Noteworthy North American Phanerogams, V. By N. L. Britton 



(1891), 25 cents. 



No. 24. Review of the North American Species of the Genus Xyris. By Heinrich 



Ries (1892), ..... 25 cents. 



Volume II. 



No. 27. Note on a Collection of Tertiary Fossil Plants from Potosi, Bolivia. By N. 



L. Britton (1892), 25 cents. 



No. 30. Ranunculus ripens and its Eastern North American Allies. By N. L. 



Britton (1892), 25 cents. 



No. 31. A Preliminary List of American Species of Polygonum. By John K. Small 



(1892), 25 cents>. 



No. 35. An Enumeration of the Plants Collected by Dr. Thos. Morong in Paraguay, 



1 888- 1 890. By Thomas Morong and N. L. Britton, with the assistance of 



Miss Anna Murray Vail (1 892- 1 893), $1.50 



No. 37. Further Notes on American Species of Polygonum. By John K. Small 



(1893), • 25 cents. 



No 38. New or Noteworthy North American Phanerogams, VII. By N. L. Britton 



(1893),. * . .25 cents. 



No. 39. Contributions to American Bryology, III. — Notes on the North American 



Species of Orthotrichum. By Elizabeth G. Britton, . . 25 cents. 



No. 40. New Genera of Plants from Bolivia. By H H. Rusby (1893), 2 5 cents. 



No. 41. The Altitudinal Distribution of the Ferns of the Appalachian Mountain Sys- 

 tem. By John K. Small (1893), 25 cents. 



No. 42. Notes upon vanous Species ot Iridacese and other Orders. By Thomas 



Morong (1893), 25 cents. 



No. 43. Notes on the Flora of Southeastern Kentucky. By T. H. Kearney, Jr. 



0893), ..... 25 cents. 



No. 44- Contributions to American Bryology, IV. Notes on the North American 



Species of Orthotrichum— \l. By Elizabeth G. Britton (1894), . 25 cents. 



No. 45. Studies in the Botany of the Southeastern United States, I. By John K. 



Small (1894), 25 cents. 



No. 46. Plants from Virginia, new to Gray's Manual Range with Notes on other 



Species. By A. A. Heller (1894) 25 cents. 



No. 47. New or Noteworthy North American Phanerogams, VIII. By N. L. Brit- 

 ton (1894), 25 cents. 



No. 49. A Study of the Scale-characters of the Northeastern American Species of 



Cuscuta. By W. D. Matthew (1893), . • 25 cents. 



No. 50. A Study of the Genus Psoralea in America. By Anna Murray Vail 



(1894), 25 cents. 



Volume III. 



No. 51. Our Conception of " Species " as modified by the Doctrine of Evolution. 



By N. L. Britton (1894), 25 cents. 



No. 53. New and interesting Species of Polygonum. By J. K. Small (1894), 25 cents. 

 No. 55. The Genus Cassia in N. America. By Charles Louis Pollard (1894), 25 cents. 

 No. 56. A Revision of the Genus Lechea. By N. L. Britton (1894), . . 25 cents. 

 No. 57. New or little known Plants of the Southern States. By T. H. Kearney, Jr. 



(1894), 25 cents. 



