INDEX TO RECENT LITERATURE 131 
Rydberg, P. A. Studies on the Rocky Mountain Flora—IX. The 
Nyctaginiaceae of the Rocky Mountain Region. Bull. Torrey Club, 
29: 680-693. 30D 1902. 
Includes new species in Adronia (6), Allioniella (gen. nov.) and Allionia (3). 
Sadebeck, R. Ueber die siidamerikanischen Piassavearten. Ber. 
Deuts. Bot. Gesells. 20: 383-395. pl. 19. 6S 1902. 
Safford, W. E. Extracts from the Note Book of a Naturalist on the 
Island of Guam.—I. Plant World, 5: 161-168. p/. 74, 75. S 1902; 
—II. Plant World, 5: 193-198. A/. 27-237. O 1902. 
Saunders, C. F. Color in Young Fern Fronds. Fern Bull. g: 5, 6. 
Ja 1got. ; 
Saunders, C. F. Hints for Beginners in the Determination of Grasses. 
Plant World, 4: 5, 6. Jazgor.  [Illust.] 
Schulz, N. Ueber die Einwirkung des Lichtes auf die Keimungs- 
fahigkeit der Sporen der Moose, Farne und Schachtelhalme. Beih. 
Bot. Centralb. 11: 81-97. f. 7-8. 1901. 
Sheldon, J. L. Notes on the Blue-berried Huckleberry. Rhodora, 
4: 14. 17 Ja 1902. 
Silsbee, F. H. Volvaria volvacea in Lawrence, Massachusetts. 
Rhodora, 4: 3-5- . 17,.Ja 1902. 
Strasburger, E. Einige Bemerkungen zu der Pollenbildung bei 4s- 
clepias. Ber. Deuts. Bot. Gesells. 19: 450-461. p/. 24. 75 1901. 
Suringar, J. V. Melocactus-Simlinge. Ber. Deuts. Bot. Gesells. 20: 
522-525. 23 D 1goz. 
Thiselton-Dyer, W.T. The Haustorium of Zoranthus aphyllus. Ann. 
Bot. 15: 749-757. pl. go. D 1901. 
Timberlake, H. G. Starch-formation in AMydrodictyon utriculatum. 
Ann. Bot. 15: 619-635. p/. 24. D 1901. 
Underwood, L. M. Minor Inaccuracies. Fern Bull. 10: 53, 54. 
Ap 1902. : 
Underwood, L. M. Some Features of Future Fern Study. Fern Bull. 
TO: 105-107. O 1902. 
Underwood, L. M. American Ferns—V. A Review of the Genus 
Danaea. Bull. Torrey Club, 29: 669-679. 3° D 1902. 
Includes five new species. 
