INDEX To Recent LITERATURE 485 
_ Roberts, H. F. The hardy Cata/pa. Bull. Kan. Agric. Exp. Sta. 
108: 99-140. Ap. rgo2. 
Robinson, B. L. Veronica Chamaedrys in New England. Rhodora, 
4: 107, 108. My. 1go2. 
Rolfs, F. M. Potato Failures. Bull. Colo. Agric. Exp. Sta. 7o: 
1-20. Mr. 1902. 
Discusses Réizoctonia Solani (Kuhn) as a cause of disease in potatoes. 
Rusby, H. H. Official botanical Names. Druggists Circ. and Chem. 
Gaz. 45: 245, 246. D. tgor. 
Rusby, H. H. The poisonous Properties of Mountain Laurel. Drug- 
gists Circ. and Chem. Gaz. 46: 27. F. 1902. 
Rydberg, P. A. Studies on the Rocky Mountain Flora, VIII. Bull. 
Torrey Club, 29: 232-246. 24 Ap. 1902. 
New species in Stan/eya (2), Thelypodium (2), Lepidium (2), Roripa (3), Lesque- 
rella, Physaria, Cardamine, Sophia (2),Draba(7),Geranium (2),Oxalisand Lupinus 
(4). 
Schumann, K. L£chinocactus ingens Zucc. Monats. fiir Kakteen- 
_kunde, 12: 72. 15 My. rgo2. _ [Illust.] 
Native of Mexico. 
Schumann, K. Echinocactus Texensis Hopff. Monats. fiir Kakteen- 
kunde, 12: 62. 15 Ap. rg02. [Illust.] 
Shear, C. L. Lewis David von Schweinitz. Plant World, 5: 45-47. 
pl. 10. Mr. 1902. 
Shoemaker, D. N. Notes on the Development of Hamamelis Vir-, 
siniana L. ~ Johns Hopkins Univ. Circ. 21: 86, 87. Je. 1902. 
Small, J. K. A Saxifrage from the Queen Charlotte Islands and its 
Relatives. Torreya, 2: 55. 12 Ap. 1902. 
Saxifraga Newcombei sp. nov. 
Small, J. K. A sea-beach Helianthus from Florida. ‘Torreya, 2: 
74, 75- 14 My. 1902. 
Helianthus carnosus Small, sp. nov. 
Smith, J.D. Undescribed Plants from Guatemala and other Central 
American Republics, XXIII. Bot. Gaz. 33: 249-262. f/. 10, 11. 
18 Ap. 1902. 
New species and varieties in Ouratea, Guarea, Matayba, Swartzia, Gurania, 
Gonzalea, Cestrum, Psychotria, Columnea, Bravaisia, Citharexylum, Aristolochia (2), 
Piper, Mollinedia, Ocotea (2), Zrema, Costus, Donnellia (gen. nov.) and Polypodium. 
Sprague, T. A. Hamadryas sempervivoides Hook. Ic. Pl. 28: pi. 
2748. My. 1902. 
Stenzel,G.W. Abweichende Bliiten heimischen Orchideen mit einem 
Riickblick auf die der Abietineen. Bibliotheca Botanica, 10°: 
1-136. p/. 7-6. 1902. 
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