﻿Index to Recent Literature 591 



Ross, H. Bliithenbiologische Beobachtungen an Coboea macrostemma 

 Pav. Flora, 85: 125-134. 23 Ap. 1898. 



Roth, F. On the Forestry Conditions of Northern Wisconsin. Bull. 

 Wis. Geol. and Nat. Hist. Survey, 1 : 1-78. 1898. [Map.] 



Roth, F. Progress in Timber Physics. Bald Cypress (Taxed/urn di- 

 stichum). Circ. U. S. Depart. Agric. (Div. Forestry) 19 : 1-24. 

 / 1. 1898. 



Some data as to distribution, abundance and character of the wood. 



Rothrock, J. T. Black Birch, Sweet Birch, Cherry Birch (Betula 

 lental,.). Forest Leaves, 6 : 169. Au. 1898. [Illust.] 



Rothrock, J. T. The Red Spruce (Picea nigra Link.), Forest 

 Leaves, 6 : 184, 185. O. 1898. [Illust.] 



Rothrock, J. T. Yellow Birch, Gray Birch (Betula lutea Michx. f. ) . 

 Forest Leaves, 6: 152, 153. Je. 1898. [Illust.] 



Schaeffer, K. L. Zur Lehre von der Reaction des Protoplasma auf 

 thermische Reize. Flora, 85 : 135-140. 23 Ap. 1898. 



Schneck, J. Do Humble Bees perforate tubular Flowers? Asa Gray 

 Bull. 6: 47, 48. Je. 1898. 



Schroter, C. Ueber die Vielgestaltigkeit der Fichte. Vierteljahrs. 



naturforsch. Gesell. Zurich, 43 : 125-252. f. 1-37. 20 Au. 

 1898. 



Schumann, K. Cerens eburneus S.-D. Monatsschr. fur Kacteen- 

 kunde, 8: 74-76. 15 My. 1898. 



Schumann, K. Der Bliitenbau von Epiphyllutn und Phyttocactus. 

 Monatsschr. fur Kacteenkunde, 8: 88-92. 15 Je. 1898. [Illust.] 



Schumann, K. Die Kacteen in Guatemala. Monatsschr. fur Kac- 

 teenkunde, 8: 52, 53. 15 Ap. 1898. 



* 



Schumann, K. Opuntia maculacantha Forst. Monatsschr. fur 

 Kacteenkunde, 8: 120. 15 Au. 1898. [Illust.] 



Schumann, K. Opuntia tessellata Eng. var. cristata. Monatsschr. 

 fur Kacteenkunde, 8: 70-73. 15 My. 1898. [Illust.] 



mann 



Kacteen 



kunde, 8: 73, 74. 15 My. 1898. 

 Scribner, F. Lamson-. Descriptions of new or little-known 



(Div. Agrost.) II : 42-58. 



/. 2-12. 1898. 



New species in Panicum, Chaetockloa, Stipa, Muhlenbergia, Sporobolus, Agrostis, 

 isetum, Zeugites, Eragrostis, Poa> Agropyron and Elymus. 



