INDEX TO AMERICAN BOTANICAL LITERATURE 487 
Purpus, J. A. Mamillaria valida J. A. Purpus, n. spec. Monats. 
Kakteenk. 21: 97-102. 15 Jl 1o11. [Illust.] 
Quehl, L. Echinocactus nidulans Quehl, nov. spec. Monats. Kakteenk. 
21: 119, 120. 15 Au IgI1. 
Quehl, L. Mamillaria bombycina Quehl. Monats. Kakteenk. 21: 106, 
15 Jl ror. 
Ramaley, F., & Gill, M. Field observations on the so-called “anemone”’ 
(Pulsatilla hirsutissima). Univ. Colorado Stud. 7: 289-293. f. I-5. 
Je 1911. 
Ramaley, F., & Mitchell, L. A. Ecological cross-section of Boulder 
Park (Tolland, Colorado). Univ. Colorado Stud. 7: 277-207. 7. 2, 
2 Je tor. 
Rehm, H. Ascomycetes novi—IV. Ann. Myc. 9. 363-371. 10 Au 
chee 
cludes new species in Philocopra (1), Xylaria (1), mses (1), Lep- 
Seas (1), Bertiella (1), Thyridaria (1), Thyridium (1), Valsa (2), Diatrype (1), 
Naevia (1), Cryptodiscus (1), Calloria (1), Belonium (t); sas (1), Patellaria (1), 
from North coe and Diairype (1), Micropeltis (1), and Pezicula (1), from 
South Americ 
Robinson, C. B. Philippine hats. Philip. Jour. Sci. 6: (Bot.) 93-131. 
pl. 4-11. Je 1gt1. 
Rolfe, R. A. Mormodes revolutum. Curt. Bot. Mag. IV. 7: pl. 8390. 
Au I9I11. 
A native of Peru. 
Rorer, J. B. A bacterial disease of bananas and plantains, Phyto- 
pathology 1: 45-49. pl. 7-10. Ap 1911. 
Rudolph, J. L’ Aster cordifolius et ses variétés. Rev. Hort. 83: 326, 
aay. 16 Fi Olt. 
Rumbold, C. Blue stain on lumber. Science II. 34: 94-96. 21 Jl 
IQIl. 
Rydberg, P.A. Noteson Rosaceae—V. Bull. Torrey Club 38: 79-89. 
7 Mr 1911;—VI. Bull. Torrey Club 38: 351-367.. 21 Au 10911. 
Seeger, E. Marchenbliiten. Monats. Kakteenk. 21: 124-126. 15 
Au I911I. 
Shimek, B. Prairie openings in the forest. Proc. Iowa Acad. Sci. 
EJ: 16-19. 1910. 
Spoehr, H. A. The relation between photosynthesis of carbon dioxide 
and nitrate reduction. Science II. 34: 63, 64. 14 Jl 1911 
Sprague, T. A. Clusia grandiflora. Curt. Bot. Mag. IV. 7: pl. 8387. 
Au I9g1t. 
A tropical American plant. 
