1 
in the same locality that Michaux described. In“another station 
in the vicinity it is reported that “there are rods covered with it.” 
The conclusion is reached that J. cordata is but one of the 
rarer forms of JZ. acuminata and Dr. Gray recognizes it as such 
and appends a description of WZ. acuminata var. cordata. 
Revision of the North American Violets.—Memoranda of a— 
Asa Gray. (Bot. Gazette, xi., pp. 253-256 and 289-293.) 
The species are divided into two sections; the first of these 
again into six groups based upon differences in the foliage and 
stigma. V. delphinifolia, Nutt., is referred to V. pedatifida, Don. : 
the earlier name. V. palmata, L, is regarded as the type of the 
numerous forms usually considered under V. cucullata, Ait., 
the latter being now var. cucullata, Gray, of the former. V. re- 
_nifolia, Gray, is reduced to V. blanda, Willd., var. renifolia; the 
western V. aurea, Kellogg, is V. premorsa, Dougl.; our common 
Dog Violet is to be known as V. canina, L., var. Muhlenbergit, 
Gray. The second section,—that of the pansies,—is represented 
only by the plant referred to V. tricolor, L., var. arvensis, DC. 
Sylva of North America.—Some additions to the. oC, S. Sargent. 
(Bot. Gazette, xi., pp. 313-315.) 
Professor Sargent detected 1 in April last, Zermimalia Buceras, 
B. & H., Myginda integrifolia, Lam., (M? latifolia, Chapm), 
and a new arborescent palm which Dr. Wendland names Psendo- 
phenix Sargentii, all on the Keys of Southern Florida. 
Synopsis of North American Pines, based upon Leaf A natomy.— 
John M. Coulter and J. N. Rose. (Bot. Gazette, xi., pp. 
256-262, and 302-309; illustrated.) 
Following up the late Dr. Engelmann’s studies of the leaves 
of Conifers, Professor Coulter and Mr. Rose have endeavored to 
find characters in the anatomy of pine needles on which to base 
an arrangement of the species. Transverse sections cut from 
near the middle of the needle were used. The primary basis of 
classification is the occurrence in the one group of a single fibro- 
vascular bundle, and in the other of two; other characters are 
the presence or absence of thick-walled cells next the epidermis 
and resin ducts; the distribution of stomata, and the position and 
relative size of the resin ducts. 
Torsion in the Hollyhock, with some Observations on Cross-fer- 
tilization—Thomas Meehan. (Proc. Phil. Acad. Nat. Sci., 
1886, pp. 291, 292. : 
