81 



Plenrothallis ornata, (Bot. Mag. Tab. 7094), 



Robinia Pseudacacia. — O71 the Chemical Constituents and Poison- 

 ons Principle of the Bark of. F. B. Power and Jacob Cam- 

 bier. (Pharm. Rundsch. viii. 29-38, illustrated). 



Seed-Wings of the Abietinece, — A Preliminary Study of the. 



m 



G. N. Best. (Microscope, x. 1-6, pi. I). 



Wing cells and seeds of Pinus inops, P, pnngens, P. montt- 

 cola, P. rigida, P, Strobns, Tsuga Canadensis, Pseudotsiiga 



Douglasiiy and Picea Ca?mdensis are figured, 



Solanum Wendlandi. (Garden, xxxvii. 104, 105, PI. 738)- 



SphcErella FragaricB, Saccardo, W. R. .Dudley. (Bull. No. xiv, 



Agric. Exp. Sta. Cornell Univ. 171- 182, figs, 1-9). 

 Thrinax excclsa, (Bot. Mag. Tab. 7088). 

 Tigridia PringieL J. G. Baker. (Bot. Mag. Tab. 7089). 

 UmbellifercB. — A Nezv Genus of J. M. Coulter and J. N. Rose. 



(Bot. Gaz. XV. 15, 16, PL ii). 



A description and figure of Donnellsmithia Gnatenialensts, 

 collected by John Donnell Smith in Guatemala, July, 1889. The 

 authors conclude that the genus is most nearly related to Etilo- 

 phus, 



Uredinial Parasites. H. J. Webber. (Am. Nat. xxiv. 75, 76). 

 Walnnt Tree,— The Rozv Farm. J. T. Rothrock. (Forest 



Leaves, ii. 133, 134, illustrated). 



A description, with illustrations of tree and fruit, as an ano- 

 malous walnut, perhaps a hybrid between Jtiglans nigra and jf, 

 regia, at Lower Brandon, Va. The girth of the trunk is said to 

 be more than thirty-one feet and a single branch on the south 

 side of the tree extends to a distance of sixty-seven feet. 

 Working of the Madison Lakes. — The. Wm. Trelease. (Trans. 



Wis. Acad. Sci. Art. and Letters, vii. 121- 129, pi. X). 



A description of the vegetation included in the scum formed 

 upon lakes Mendota and Monona. The appearance of this scum 

 is often spoken of as the ''working" of the lakes. A long list of 

 citations in regard to the subject of ** water bloom " is appended. 

 The plate includes figures of Anab(Bna Hassallii. A. circi^talis, 

 A. {SphcErozygd) flos-aqncB. A. Mendotce, Lyngbya Wollei, 

 Ccelosphaerinm Kiitzingiannmy Clathrocystis cBrnginosa, and 



Nostoc flos-aqucE. 



