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67 
July.” Parthenium integrifolium is stated to have the “ stem 
below bulbously thickened, with many thickened root fibres.” 
Hybrids are noted between Vernonia Arkansana, V. fasciculata 
and V. Noveboracensis. N, LoB: 
Climate and Plants. L. H. Pammel. (Monthly Review of 
the Iowa Weather and Crop Service, ii. 6). 
Continuity of Protoplasm through the Cell Wall of Plants. W. 
J. Beal and J. W. Toumey. (Proc. Am. Ass. Ad. Sci. xxxix. 
332). 
Development and Function of the So-called Cypress “ Knees,” 
together with a Short Consideration of the Natural Habitat 
of the Tree. W.P. Wilson. (Proc. Am. Ass. Ad. Sci. xxxix 
320). 
Development of the Sporocarp of Griffithsia Bornetiana. V.M. 
Spalding. (Proc. Am. Ass. Ad. Sci. xxxix. 327). 
Diatoms—The Classification of. C. M. Vorce. (Am. Month. 
Mic. Journ. xii. 150). 
This is a criticism of the paper by Rev. Frederick B. Carter 
on Diatoms: their Life-History and Classification, in which the 
writer refers to the omission of the genera Actinocyclus, Am- 
phiprora and Rhizwolenia. He also expresses regret that the 
classification of H. L. Smith was not adopted rather than that 
given in the Micrographic Dictionary. C. H. K. 
Diseases of Trees Likely to Follow Mechanical Injuries. W. G. 
Farlow. (Read before the Massachusetts Horticultural Socie- 
ty, March 7, 1891. Pamphlet 15 pages). 
A brief untechnical explanation of the structure of a tree- 
trunk, with instructions for pruning, protecting and preventing 
the growth of fungi, and a plea for the planting and care of trees 
in towns and cities, 
Distribution of Hepatice of North America. Lucien M. Un- 
derwood. (Proc. Am. Ass. Ad. Sci. xxxix. 298). : 
Distribution of the Trees, Shrubs and Vines of Jackson Co., Miss. 
B. F. Bush. (Kansas City Scientist, v. 161). 
Luphorbia—On the Seed Coats of the Genus. WL. H. Pammel. 
(Proc. Am. Ass, Ad. Sci. xxxix. 328.) 
Fe ’7ms—George E, Davenport. Read before the Mass. Hort. 
Soc., March 28th, 1801. Reprint. 
