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INDEX TO AMERICAN BOTANICAL LITERATURE 255 
Owen, M. L. Frederick William Batchelder. Rhodora 14: 41-45. 
5 Mr ro12. 
Palmer, T. C. Concerning Navicula socialis. Proc. Delaware Co. (Pa.) 
Inst. Sci. 6: 115-120. 15 Mr 1912. 
Paulsen, O. Marine plankton from the East-Greenland Sea (W. 
of 6° W. long. and N. of 73° 30’ lat.) collected during the “‘ Dan- 
mark Expedition” 1906-1908—III. Peridiniales. Meddelelserom 
Grénland 43: 303-318. f. F170 108%. 
Pember, F. T. The Colorado desert for ferns. Am. Fern Jour. 2: 
12-15. 29 F 1g12. 
Phelps, 0. P. A plea for fern protection. Am. Fern JOar.. 2:32; 23, 
29 F 1912. 
Piper, C. V. Agricultural varieties of the cowpea and immediately 
related species. U. S. Dept. Agr. Plant Ind. Bull. 220: 5-160. 
bl. I-12. 29 F 1012, 
[Prain, D.] Brunfelsia undulata. Curt. Bot. Mag. IV. 8: pl. 8422. 
A plant from the West Indies. 
Quehl, L. Mamillaria Mainiae Kath. Brand. Monats. Kakteenk, 22: 
19. 15 F 1912. [Illust.] 
Quehl, L. Mamillaria Scheeri Miihlenpf. Monats. Kakteenk. 22: 20- 
24. 15 F rgq2. 
Rabak, F. Wild volatile-oil plants and their economic importance: 
I—black sage: II—wild sage; I1I—swamp bay. U. S. Dept. Agr. 
Plant Ind. Bull, 235: 5-37. f. 1-6. 30 Ja 1912. 
Ramona Stachyoides, Artemisia frigida, and Persea pubescens. 
in, W. H. Sclerotinia Panacis sp. nov. the cause of a root rot of 
Sinseng, Phytopathology 2: 28-31. pl. 3. F 1912. [Illust.] 
Reiche, K Ein Friihlingsausflug in das Kiistengebiet der Atacama 
(Chile). Bot. Jahrb. 4s: 340-353. f. 1-7. 21 F 1911. 
e 
mche, KE. Instrucciones para estudios fitogeograficos en México. 
An. Inst. Méd, Nac. 
Nextamalxochitl. An. Inst. Méd. Nac. 12: 12-14. 
bl. 1. 912 
é Ranunculys Petiolaris, 
» K. Nicandra bhysalodes. An. Inst. Méd. Nac. 12: 16, 17. 
ae 314. 1912, 
binson, C. B. Philippine bryophytes and lichens. Bryologist 15: 
32, 33. Mr ror, 
