No. 44. Contributions to American Bryology, 1V. Notes on the North American 
Species of Orthotrichum—II. By Elizabeth G, Britton (1894), . 25 cents. 
No. 45. Studies in the Botany of the Southeastern United States, 1. By John K. 
SINE CLSOA I i ry eos eke we ee As ge ng ey es ee 
No. 46. Plants from Virginia, new to Gray’s Manual Range with Notes on other 
species. By A.A. Heller (1594) og bicu, o ns hae 25 cents. 
No. 47. New or Noteworthy North American Phanerogams, VIII. By N. L. Brit- 
THE CEOUANS (oes hoa 3 eb he hase ace en Re 25 cents. 
No. 48. Contributions to American Bryology, V.—Notes on the North American 
Species of Weissia (Ulota). By Elizabeth G. Britton (1894), 25 cents. 
No. 49. A Study of the Scale-characters of the Northeastern American Species of 
. Custuta.. By W. D. Matthew (1893),: . . . - + 6 6 35 cents. 
No. 50. A Study of the Genus Psoralea in America, By Anna Murray Vail 
i oS PIS RE PSaS pac de Sara Gam ae ar ane om Reg er a 25 cents. 
No. 51. Our Conception of “Species” as modified by the Doctrine of Evolution. 
eG Dis Perr CLOOA pico fide, a es gk ee oe Ee OS 
No. 52. Contributions to American Bryology, VI. Western Species of Orthotrichum. 
By Elizabeth. GC, Britton (8894)5) 5 6-46 i ne ca et eat 
No. 53. Newand interesting Species of Polygonum. By J. K. Small (1894), 25 cents. 
No. 54. Contributions to American Bryology, VII. A revision of the Genus Phys- 
comitrium. By Elizabeth G. Britton (1894), . . .. +: 25 cents. 
No. 56. A Revision of the Genus Lechea. By N. L. Britton (1894), . . 25 cents. 
No. 57. New Sa little known Plants of the Southern States. By T. H. Kearney, Jr. 
CRN se hs 8 ate ee AGN ee sr a: 
No. 58. A Contribution to the History of the Formation of the Lichen Thallus. By 
* Carlton C. Curtis (1894), 
Small (1894), agen nae po eel oiee pray raters 
No. 60. Contributions to the American Bryology, VIII. A Revision of the Genus 
Sruchia, with Descriptions of Types and one new Species. By Elizabeth 
Gr Bitton (ibo4y, 6 a ce er a Be 
No. 61. The Smilacez of North and Central America. By Thomas Morong (1894) 
No. 62, A preliminary Revision of the Genus Lat¢hyrus in North America. By 
MOS Teo WOME LIGDA Yok eS his, wes eee 25 cents. 
No. 63. Two Species of Oxalis. By John K. Small (1894)... - 25 cents: 
No. 64. Notes on some of the rarer Species of Polygonum. By John K. Small 
Oe eas ep Ger) a es Ca es 25 conte. 
No. 65. Some new Florida Plants. By T. H. Kearney, Jr. (1894), . . . 25 cents. 
No. 66, Two new Genera of Plants from Bolivia. By H. H. Rusby(1894), 25 cents. 
No. 67. Family Nomenclature. By John Hendley Barnhart (1895), ._ - 25 cents: 
No. 68. A Revision of the North American Species of the Genus Cracca. By 
WR PER VAlt CEOS es ce gh a ae ee ae 
No. 69. Contributions to American Bryology, IX. A Revision of the Genus Scou- 
Sif ies Description of one New Species. By Elizabeth G. Britton 
PO ee a OO ie en Pas ng 4, a Pr 
No. 70. Studies in the Botany of the Southeastern United States, III. By John K. 
Small (1895), . . . GE IOS OP ED" oieay eee ates 
No. 71. An Enumeration of the Plants Collected by Dr. Timothy E. Wilcox, U.S. 
serrata Sull. 3. On a European Hybrid of Physcomitrelia patens. By 
Penber: G. Park (iMaey csis S 25 cents. 
No. 73. Some new hybrid from the Southern States, By John K. Small 
Uy iti a a ae Re 25 cents. 
PROF. N. L, BRITTON, 
Columbia College, 
NEW YORK CITY: 
