Iviii 
Cu rren t L iter a hire . 
Pittonia (a Series of Botanical Papers). Vol. I {continued). 
Part i. Greene: Echinocystis and Megarrhiza. 
: Some West- American species of Trifolium. 
— : Some West- American Asperifoliae (continued in Nos. 2 
and 3). 
— : The species of Zauschneria. 
• : A new genus of Asteroid Compositae. 
: New species mainly Californian. 
„ 2. Greene: Wherefore Pittonia ? 
: A curious Collinsia. 
: Miscellaneous Species, new or rare. 
— : A botanical excursion to the island of San Miguel. 
: A Catalogue of the Flowering Plants of the island of San 
Miguel. 
„ 3. : West- American phases of the genus Potentilla. 
; Some American Polemoniaceae. I. 
: New or noteworthy species. 
: Echinocystis and Megarrhiza. 
: Biographical notice of Dr. Arthur Kellogg. 
Proceedings of the American Academy of Arts and Sciences. Vol. XXIII. 
Hill and Comey : On the behaviour of sound and decayed wood at 
high temperatures. 
Bigelow : On the structure of the frond in Champia parvula, Harv. 
Proceedings of the American Association for the Advancement of Science. 
Vol. XXXIII. 
Farlow : Vegetable parasites and evolution. 
Proceedings of the Academy of Natural Sciences of Philadelphia, 1887. 
Part 1. Porter : A List of Carices of Pennsylvania. 
Meehan : Sugar in China ; Floral Calendars ; Cortical peculiarities in 
the plum. 
,, 2. : On Aphyllon as a Root-parasite. 
: On the stipules of Magnolia Frazeri. 
- — — — : Note on Chionanthus. 
Proceedings of the American Microscopical Society, 1887. 
Smith : A contribution to the life-history of the Diatomaceae. 
Proceedings of the American Philosophical Society (Philadelphia). 
Vol. XXIV. 
No. 125. Claypole : Organic variation indefinite not definite in direction— an 
outcome of environment. 
Proceedings of the Eighth Annual Meeting of the Society for the Pro- 
motion of Agricultural Science, 1887. (New York.) 
Beal : Some Suggestions as to experimenting with Grasses. 
: A study of Poa pratensis. 
Burrill : A disease of Broom-Corn and Sorghum. 
Cook : Notes on Noxious Insects. 
Halsted : A hint as to Nitrogen-appropriation in Clovers. 
• : The Peg in germinating Cucurbitaceous plants. 
