156 BOTANICAL GAZETTE - [FEBRUARY 
trum (2), Gryphocarpa (new genus of Compositae from Mexico), Vaccinium, 
and Pinus (n.sp. from W. Indies).— J. M. C 
Cu.-ED. MArTIN® has described with great fulness the exceedingly vari- 
able fungus called Boletus subtomentosus as displayed in the .region about 
Geneva. After a presentation of the bibliography and a discussion of the 
general characters, he describes eleven subspecies and illustrates them 
with 18 colored plates.—J. M. C 
Wittrock? has published a very interesting set of photographs of 
botanists in the collection at the botanical garden at Stockholm, accompany- 
ing them with biographical notes. The plates contain the reproduction of 
213 photographs, some of them representing well-known botanists at differ- 
ent aie M.C 
Part 217 of Engler and Prantl’s Die natiirlichen Pflanzenfamilien con- 
tains Ka Lichens (Fvechten), by A. Zahlbruckner. Part 218 contains the 
‘se ois magaper Drepanophyllaceae, Snes eat and Bryaceae, by V. F. 
‘Brotheru aM. &. 
E SIXTH PART of John Donnell Smith’s enumeration of Central 
American plants® has been distributed. It comprises a list occupying 87 
pages, and three separates containing descriptions and plates of new species. 
MC, 
THE CURRENT FASCICLE of Richter’s Plantae Europaeae™ concludes 
the Caryophyllaceae and continues the list to Clematis among the Ranuncu- 
laceae, the sequence being that of Engler.—J. M. C 
NOTES FOR STUDENTS. 
Aso finds* that the best value of the ratio CaO: MgO for the mulberry 
lies between 2 and 3, an excess of magnesia over lime dwarfing plants very 
much.—C, R. B. 
“MartIN, Cu.-Ep., Le “Boletus subtomentosus” de la région génevoise- 
Matériaux pour la flore Se ciciates suisse 2: fasc. I. 1903. 
K, V. B., Catalogus illustratus iconothecae botanicae horti a 
Stockholmiensis anno 1903; notulis biographicis adjectis. Acta Hort. Berg. 
2. pp. 198. 46. 1903 
*° SMITH, JOHN DoNNELL, Enumeratio plantarum esata necnon Sal- 
vadorensium Hondurensium Nicaraguensium Costaricensium. Pars VI. Baltimore, 
Md.: The author. 1903. 
“GURKE, M., Plantae Europaeae. Enumeratio -systematica et synonymica 
plantarum phunercigainiparkin 3 in Europa sponte crescentium vel mere inquilinarum- 
peris a Dr. K. RICHTER incepti. Tomus II, fasc. 3, pp. 321-480. sets 
Wilhelm Engelmann. 1903. 5. 
* Aso, K., On the influence of a certain ratio between lime and magnesia on the 
growth of the mulberry tree. Bull. Agric. Coll. Tokyo Imp. Univ. 5: 495-499: 
27+ 1903. 
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