BOTANICAL GAZETTE. 45 



Living leaves and stems of Corydalis Brandegei. Colorado. 

 T. S. Brandegee. 



Puccikia Boisduvalle. — Spots indefinite, yellowish, often 

 tinged with red or brown; sori few, scattered, amphigenous, brown; 

 spores obovate or oblong-elliptical, obtuse, slightly constricted at 

 at the septum, smooth, .0014-.0016 of an inch long, .0008-00095 

 broad; pedicels short, colorless. 



Living leaves of Boisduvalia Torreyi. Santa Cruz, California. 

 M. E. Jones. 



Ueomyces Jokesii. — Spots none; sori amphigenous, small, 

 scattered, reddish-brown; spores subglobose to elliptical,verruculose, 

 .0011-0014 of an inch long, .0009-0011 broad; pedicel short, col- 

 orless. 



Living leaves of Ranunculus. Soda Springs, California. M. E. 

 Jones. 



The roughly warted spores and scattered amphigenous sori are 

 notable features in this species. 



Tkichobasis Wyethi^e — Spots none; sori dot-like, abundant, 

 often occupying the whole lower surface of the leaf, reddish-brown; 

 spores subglobose or broadlv elliptical, .0012-.0016 of an inch long. 

 .0008-0012 broad. 



Living leaves of Wyethia angustifolia. Colorado. T. S. 

 Brandegee. 



Tkichobasis Helianthell^. — Spots pale greenish; sori hy- 

 pophyllous, numerous, generally most abundant along the midrib, 

 reddish-brown; spores globose or subglobose, uninucleate, .0012- 

 .0014 of an inch in diameter. 



Living leaves of Heliarithella Californica. Soda Springs, Cal- 

 ifornia. M. E. Jones. 



Plucheas. — Pluchea eamphorata, P.foetida, and even P. pur- 

 pura seens, DC, appear to be forms of one variable and widely dif- 

 fused species. Is the plant of the Mississippi valley found growing 

 anywhere far from subsaline soil, and is the root perennial? Is the 

 root of P. camphordta ever perennial ? — A. Gray. 



On the Power possessed by Leaves of placing themselves 



at Right-Angles to the direction of Incident Light; by 



Francis Darwin. Journal of the Linn. Soc, no. 112 (vol. xviii, 

 pp. 420-455), published June, 1881, read Dec. 16, 1880— Taking up 

 this subject where it was left by his father and himself in the work 

 on " The Power of Movement in Plants, 1 ' Mr. Francis Darwin, in 

 this paper, records his investigations and experiments made with a 

 well-devised modification of Sachs 1 Klinostat, with the view of de- 

 termining whether Frank's or DeVries's explanation of the position 

 which leaves normally assume with respect to the light is the more 



