1894. ] Current Literature. : 343 
species. There seems to be here an indication of the northern exten- 
sion of the Gult flora along the deep swamp-lands of the lower Mis- 
sissippi. Leitneria is also reported from the Brazos in Texas, but 
there is some uncertainty as to the locality. A remarkable feature of 
Leitneria is its lightness, being the lightest of all known woods, with 
a'specific gravity of 0.207, while ordinary cork is given as 0.240. 
Dr. Trelease has made a careful study of the anatomical structure of 
the stem, and illustrates it by the reproduction of several excellent 
photomicrographs. Fifteen full-page plates are given. 
Mr. JARED G, Smitu has published an excellent revision of the 
North American species of Sagittaria and Lophotocarpus, distributing 
itin advance of the sixth annual report of the Missouri Botanical Gar- 
den. Dr. Engelinann’s notes and types served as a foundation for 
the work. Leaf forms prove very unsatisfactory in classification, and 
the least variation is found to be in the form and size of the acheni- 
um, form of the anthers, pubescence or not of the filaments, relative 
length of fertile and sterile pedicels, etc. Twenty-two species are 
recognized, three of which are Mexican, and several new, and much- 
tangled synonymy is straightened out. Following Buchenau and 
Micheli, Lophotocarpus is separated from Sagittaria. Twenty-nine 
full page plates accompany the revision. 
THE THIRD and last part of Dr. John M. Coulter’s "Manual of the 
Botany of Western Texas” has been issued by the Department of 
Agriculture. It contains the apetale, monocotyledons, gymnosperms, 
and pteridophytes. The Juncacez are contributed by F. V. Coville; 
Carex by L. H. Bailey; Graminee by L. H. Dewey; and Pterido- 
Phyta by L. M. Underwood. This completes, in a handy volume, the 
Presentation of the flora of a very interesting region, whose local study 
Was Seriously interfered with by the scattered and inaccessible nature 
of the publications that dealt with its plants. The need of such a 
a has been attested by the fact of a much larger demand for the 
earlier parts than could be supplied. 
_ TWo “Contributions” have just been issued from’the Gray Herba- 
mam; One by Dr: B.-L: Robinson (Proc. Amer. Acad. 29: 273-339)» 
ores the other by Dr. Robinson and Mr. J. M. Greenman (1.c. 382-394). 
— fo tmer Dr. Robinson presents a revision of the North Ameri- 
i Alsinex, 4 continuation of his study of the Caryophyllacez. Of 
ine Native species Cerastium contains 16 species and varieties, Stel- 
Ti *26, Arenaria 46, Sagina 9, and Spergularia (retained instead of 
wm thus adding to the synonymy of this much vexed group) IT. 
rest of the contribution and also the second one are dev to 
eg of plants from the Pringle collections of 1892 and 1893. 
Vol. XIX.—No, 8. 
