263 
westward till it has met the western species, and now the puts- 
lane caterpillar, finding them both equally palatable, is traveling 
eastward at the rate of several hundred miles in one season. 
Potentilla — West American Phases of the Genus. Edward L. 
Greene. (Pittonia, i, pp. 95-106). 
Agreeing with Bentham and Hooker and with Baillon, Prof. 
Greene places the species of Horkelia and Jvesia under Potentilla. 
He states fully the reasons which justify this step. P. e/ata, P. 
puberula, P. Clevelandi, P. ciliata and P. Howellit are new 
species; P. Lindleyi is Horkelia cuneata, Lindl., P. Douglasiz is 
Horkelia fusca, Lindl., P. Andersonii is Horkelia parvifiora, 
Nutt. 2. Arizonica is Ivesia pinnatifida, Watson, and P. 
decipiens is Ivesia pygm@ea, Gray, the new specific names being 
given because the others are preoccupied. 
Staining Vegetable Tissues—Notes on.—W. R. Lighton. (Amer. 
Month. Micros. Journ., viii., pp. 194, 195). 
Describes staining living shoots by immersing their cut ends in 
ordinary colored writing fluids, especially the scarlet and purple. 
Taxodium distichum, or Bald Cypress—WNotes on the.—N. S. Sha- 
ler. (Mem. Mus. Comp. Zoél. Harvard Coll., xvi., pp. I-10). 
The question of its growth in swampy ground and the object 
of the peculiar “knees” which it throws out in such localities, as 
well as its geological history and the adaptation to reproduction 
in the water by means of rooting twigs rather than seeds are 
deduced as aseries of modifications by which the tree has been 
enabled to hold its own under unfavorable circumstances. 
Ternstroemiaceas, O Tamakoare, Especies novas da ordem das. 
J. Barboza Rodrigues, (Director of the Botanical Museum 
of the Amazons). (Pamphlet 4to, pp. 28. Manaos, S.A., 1887.) 
This is a monograph of the genus Caraipa with five species ; 
C. palustris, C. silvatica, C. spuria, C. Lacerdaei and C. insidiosa, 
accompanied by a large plate illustrating C. rupestris, C. silva- 
tica and C. spuria. Chemical analyses accompany the descrip- 
tions and medicinal uses and popular names are given. 
Botanical Notes. 
Hepatics. We have received a set of “ Hepatice “Ameri- 
cane prepared by L. M. Underwood and O. F. Cook,” com- 
