286 ECOLOGY [Bot. Absts. 



number of species, only the more conspicuous sorts being mentioned, some 20 species in all. 

 Habitat and plant are listed with a brief descriptive phrase. It is noted that specimens 

 collected at Manzanillo in the same habitat as those collected by Humboldt and Bonpland at 

 Acapulco a short distance to the south, correspond perfectly to the original description and 

 plate. Guadalajara is another locality furnishing type specimens of these early travelers. 

 Other collectors and collections are mentioned. One new genus and 22 new species are 

 reported from this trip.— Lula Pace. 



1966. Jennings, O. E. Potamogeton Vaseyi in northeastern Ohio. Ohio Jour. Sci. 19: 

 343. 1919. — Potamogeton Vaseyi has been collected at Brady's Lake, Portage Co.. and at 

 Cowles Creek, near Geneva-on-the-Lake, Ashtabula Co. — H. D. Hooker, Jr. 



1967. Killip, Ellsworth P. Fern hunting in Panama. Amer. Fern Jour. 9: 5-17. 1919. 

 — The article is a general description of the fern flora of the Isthmus of Panama. In addition 

 to the three or four hundred different species of ferns, a number of which are new, the author 

 collected grasses and flowering plants. — F. C. Anderson. 



1968. Leighty, C. E., and T. B. Htjtcheson. On the blooming and fertilization of wheat 

 flowers. Jour. Amer. Soc. Agron. 11 : 143-162. 2 fig. 1919. — From the results of these studies 

 it is seen that wheat flowers do not universally bloom early in the morning. Experiments 

 were conducted at the Minnesota Agric. Exp. Sta. and at Arlington, Va. The time of bloom- 

 ing of 2977 wheat flowers in 69 heads were recorded. Of these 1492 bloomed at night, and 

 1485 during the day. Of those blooming during the day 764 bloomed before noon and 721 

 in the afternoon. Two daily periods of extensive blooming were determined, one from 7 to 

 9 in the morning and the other about the middle of the afternoon. It was found necessary 

 to protect emasculated flowers in order to prevent undesired pollination. [See Bot. Absts. 

 3, Entry 2161.]— J. J. Skmner. 



1969. Lewis, I. F. The vegetation of Shackleford Bank [Carteret Co., North Carolina]. 

 North Carolina Geol. Surv., Econ. Paper 46. 32 p. 11 pi. 1918. — Shackleford Bank is a 

 barrier beach similar in general features to many others along the coast of the southeastern 

 United States. The soils and climate are briefly discussed, and the vegetation is divided 

 into several formations and associations. There is a brief description of Bogue Bank (the 

 next beach on the west), a few pages of suggestions for checking the drifting of the sand, and 

 a discussion of the geographical affinities of the flora. Over 200 species are listed, and their 

 habitats indicated by symbols. — Roland M. Harper. 



1970. Markle, M. S. A comparison of the plant succession on Hudson River limestone 

 with that on Niagara limestone near Richmond, Indiana. Proc. Ind. Acad. Sci. 1917: 109-113. 

 1918. — The Hudson River limestone is softer than the Niagara limestone and contains vary- 

 ing amounts of shale. Owing to this difference in physical character, the plant succession 

 on these two kinds of rocks is strikingly different. On the Hudson River limestone the suc- 

 cession is much more rapid and lichens are not found in the pioneer association. — P. D. 

 Strausbavgh. 



1971. Nichols, G. E. Raised bogs in eastern Maine. Geog. Rev. 7: 159-167. 2 fig- 

 Mar., 1919. — Bogs of this type are in the United States chiefly confined to southeastern Maine, 

 and they occur also in New Brunswick and Cape Breton. They are in a region of boreal 

 coniferous forests, and they are by no means universal even in the regions of their greatest 

 abundance, many flat bogs also occurring near by. They are distinguished by their convex 

 surface, the centers being sometimes 10 feet higher than the edges. Sphagnum papillosum is 

 a characteristic plant. — Roland M. Harper. 



1972. Oliver, F. W., in Carey, Alfred E., and F. W. Oliver. Tidal lands: a study of 

 shore problems. 277 p. 29 pl.,64fig. Blackie & Son Limited: London, 1918. — A presen- 

 tation of certain problems which concern the maritime engineer, including extensive studies 



