142 BOTANICAL GAZETTE [ FEBRUARY 
structs two new asteroid genera of Composite, Oreastrum and Leucelene, the 
latter founded upon Diflopappus ericoides T.& G. Dr. E. Koehne has pub- 
lished an account of the genus Philadelphus,* of which thirty-three species 
are epee twenty of which belong to the flora of North America and 
Central America. A new species from Mexico is described, and two from 
“western North America,’ while P. gvandiflorus of American authors is 
identified with P. /atifolius Schrad. The species hybridize freely, and a 
largé number of such cases is recorded. Mr. William Fawcett has published 
a synoptical arrangement of the Melastomacez of Jamaica,” a family repre- 
sented by eighteen genera and over fifty species. M. A. Franchet continues 
his publication of numerous new species of Chinese Composite, among which 
there recently appears a new genus, Stereosanthus,” apparently intermediate 
between Inuloidez and Senecionidez. A new Californian 7rifo/ium has been 
described by Mr. W. C. Blasdale.* Dr. W. A. Setchell has published a 
second fascicle of his ‘“ Notes on Cyanophycez.’’*” A plate and an account 
of Sisyrinchium Californicum, growing in Ireland, has been published by Mr. 
A. B. Rendle.® Students of fresh water algze will welcome the appearance 
of the first installment of Welwitsch’s African collection, by W. West and 
G. S. West,3* among which are numerous new species. Mr. L. H. Pammel 
and Professor F. Lamson-Scribner have published notes upon a collection of 
grasses collected in 1895 between Jefferson, Iowa, and Denver, Colo.* Mr. 
L. H. Pammel has also published some notes upon the flora of western lowa.* 
Mr. F. L. Fernald has published an account, with plate, of Aster tardifiorus 
L.,* previously discussed by him in this journal.s—J. M. C. 
AT ONE TIME the anatomical changes induced in climbing organs by the 
a ae support, and the pull exerted by the weight of the plant, were 
coincident or causal to curvature, instead of consequent upon 
it. Tendaite climbing branches, climbing hooks, and twining stems hai 
been previously examined, and Dr. von Derschau has recently extended the 
work to include a number of colecns saacacast Twining petioles are not so 
*S Gartenflora 45: 450-461. gue 
