34 INDEX TO AMERICAN BOTANICAL LITERATURE 
Meyer, R. Echinopsis apiculata u. E. Salmiana. Monats. Kakteenk. 
24°. 160, ..15 O 1911. 
Meyer, R. Einiges iiber Echinocactus recurvatus Lk. et Otto und seine 
Varietiten. Monats. Kakteenk. 21: 148-152. 15 O 1911. [Illust.] 
Murrill, W. A. The Agaricaceae of tropical North America—lV. 
Mycologia 3: 271-282. N I9gII. 
Includes descriptions of 21 new species in Leptoniella (4), Eccilia (3), Nolanea (2), 
Pluteus (6), Entoloma (1), Pleurotus (1), and Volvariopsis (4) 
Nelson, A. Contribution from the Rocky Mountain Herbarium—IX. 
New plants from Idaho. Bot. Gaz. 52: 261-274. 17 O 1911. 
Fifteen new species described. 
Orton, C. R. Disease resistance in varieties of potatoes. Proc. 
Indiana Acad. Sci. 1910: 219-221. I9QII. 
Pearl, R., & Bartlett, J. M. The Mendelian inheritance of certain 
chemical characters in maize. Zeits. Induk. Abst. und Vererbungs- 
lehre 6: 1-28. O 1911. 
Peirce, G. J. American botany. Plant World 14: 81-87. Ap I9II. 
Peirson, H. Abnormal development in maize. Jour. Bot. 49: 347, 
348. N 1911. 
Petry, L. C., & Markle, M. S. An ecological survey of Whitewater 
Gorge. Proc. Indiana Acad. Sci. 1910: 223-243. f. I-9. I9I1I. 
Phillips, F. J. Conifers without normal whorls. Plant World 14: 
66-69. f.z. Mr 1911. 
Pretz,H.W. Aninteresting find. Am. Fern Jour. 1: 137-141. 29N 
191. [Illust.] 
Asplenium Bradleyi D. C. Eaton. 
Quehl, L. Mamillaria Caput-Medusae Otto var. centrispina Salm- 
Dyck. Monats. Kakteenk. 21: 152. 15 O 1911. 
Quehl, L. Mamillaria Seideliana Quehl nov. spec. Monats. Kak- 
teenk. 21: 154, 155. 15 O1g11. ([Illust.] : 
Richter, M. C. Honey plants of California. Univ. Calif. Agr. Exp. 
Sta. Bull. 217: 973-1037. f. 1-14. Je 1911. 
Robinson, B. L. Notes on the genus Cirsium. Rhodora 13: 238-240. 
25 N 10g1I. 
Rohrer, J. B. Report of mycologist for year ending March 31, 1911— 
(Part II). Board of Agr. Trinidad and Tobago Circ. 4: 1-70. pl. 
I-13. 20Q0 1911. 
Safford, W. E. Edward Palmer. Am. Fern Jour. 1: 143-147. 29 N 
19II. 
Safford, W. E. Notes of a naturalist afloat—I. Am. Fern Jour. 1: 
121-129. pl. 5. 29 N 1911. 
