614 INDEX TO AMERICAN BOTANICAL LITERATURE 
Robinson, C. B. Botrychiums in sand. Torreya 7: 219, 220. 19 
N 1907. 
Rolfe, R. A. Cattleya labiata. Orch. Rev. 15: 335, 336. N 1907. 
Native of Brazil. 
Rolfe, R. A. Cycnoches Egertonianum. Orch. Rev. 15: 337-340. / 
37. N 1907. 
Native of Guatemala, 
Rolfe, R. A. Paphiopedilum x Olivia. Orch. Rev. 15: 297, 298. 7 
337. O 1907. 
Rosenstock, E. Beitrige zur Pteridophytenflora Siidbrasiliens. Hed- 
wigia 46: 145-167. 15 F 1907. 
Includes descriptions of new species in L/aphoyglossum (4) and Danaea (2). 
Saunders, C.F. Flowers of a dry land. Am. Bot. 13: 27-30. O 
1907. 
Schrenk, H. von. Branch cankers of Rhododendron. Ann. Rep. Mis- . 
souri Bot. Gard. 1907: 77-80. 1907.  [Illust.] 
Schrenk, H. von. Disease of sycamore trees. Plant World 10: 265. 
N 1907. 
Schrenk, H. von. On frost injuries to sycamore buds. Ann. Rep. 
Missouri Bot. Gard. 1907: 81-83. p/. 7. 1907. 
Schuster, J. Zur Systematik von Casta/ia und Nymphaea. Bull. 
Herb, Boiss. 11. 7: 853-868. 30'S 1907; go1-9g16. 31 O 1907+ 
Setchell, W. A. Two new hypogaeous Secotiaceae. Jour. Myc. 13: 
236-241. pl. 107. 30N 1907. 
Secotium tenu pes and Elasmomyces russuloides spp. nov., natives of California. 
Stephani, F. Species Hepaticarum. Bull. Herb. Boiss. Il. 7: 837- 
852. 30S 1907. 
Stevens, F.L. Two interesting apple fungi. Science II. 26: 724, 
725. 22. 1604; 
Stevens, W.C. Plant anatomy from the standpoint of the develop- 
ment and functions of the tissues, and handbook of micro- -technic. 
-i-xil. 1-349. f.7-736. Philadelphia, 1907. 
Trelease, W. Additions to the genus Yucca. Ann. Rep. Missouri 
Bot. Gard. 1907: 225-230. pl. 12-17. 1907. 
Includes descriptions of two new species of Yucca, natives of Manion: 
Trelease, W. Agave macroacantha and allied Euagaves. Ann. Rep. 
Missouri Bot. Gard. 1907: 231-256. pl. 18-34. 1907. 
Vinson, A, E. Some observations on the date. Plant World 10: 
259-262. N 1907. 
