Tgo4] CURRENT LITERATURE 313 
651-656) has published two new species of Quercus from Costa Rica—A. THEt- 
LUNG (idem 695-716), in the first of a series of studies of Lepidium, has replaced 
the L. virginicum of American authors by L. densiflorum Schrad., has disentangled 
from the same confused mass of forms the new species L. meglectum, and has 
described a new related species (L. costaricense) from Costa Rica.—C. A. M. 
LinpmaN (Arkiv for Botanik 1:7-56. 1904) has published a critical review of the 
American species of Trichomanes, based on collections in Swedish herbaria and 
on specimens obtained by the author in Brazil, 3 new species being described; 
and has also (idem 187-276) published an account of a collection of Brazilian 
ferns containing 16 new species—M. L. FERNALD (Rhodora 6:162. 1904) has 
published a new species of Alnus (A. mollis) from Canada and adjacent Eastern 
United States —E. P. BIcKNELL (Bull. Torr. Bot. Club 31:379-391. 1904), in 
presenting the Californian species of Sisyrinchium, has described 5 new species.— 
P. A. RyDBERG (idem 399-410), in his 1th ‘Studies on the Rocky Mountain 
flora,” has described new species of Juncus (3), Juncoides, Allium (2), Corallorhiza 
Salix, Atriplex (2), Corispermum, Claytonia, Cerastium, Arenaria (3), Alsinopsis, 
Lychnis, Stanleya, and Schoenocrambe.—N. PATOUILLARD (Bull. Soc. Mycol. 
France 20:1 36. fig. 1. 1904) has described a new genus (Seuratia) of Capnodiaceae 
leaves of the coffee plant—H. Harms (Ann. Jard. Bot. Buitenzorg II. 
4513-16. 1904) has described a new East Indian genus (Anomopanax) of Aralia- 
‘eae, comprising 3 species.—S. H. Koorpers (idem 19-32. pls. 2-3) has described 
‘new genus (7. eijsmanniodendron) of Verbenaceae under cultivation, its nativity 
being unknown.—G. R. Saw (Gard. Chron. III. 36: 122. fig. 49. 1904) has 
. = new pine (P. Nelsoni) from northeastern Mexico.—W. A. MURRILL 
:415-428. 1904), in his eighth paper-on the Polyporaceae 
has presented Hapalopilus and Pycnoporus, and described 6 
: - Brirron (Torreya 4:124. 1904) has described a 
NEW Species of Alnus from New York M.C. 
es 
HE sep has published in full34+*the results of his studies upon the 
1904, * Sp renay in the Mucorineae first announced in Science June 3, 
tions’ that aa work has completely revolutionized our views of the condi- 
have been ‘uence the production of zygospores. While most investigators 
trying to determine external factors such as increased humidity, high 
ne seasonal conditions, etc., as the stimuli to-zygospore formation, 
individual enec: that it “‘is conditioned primarily by the inherent nature of the 
*Pecies and only secondarily by external factors.” 
Oe rag shows that the Mucorineae fall into two groups. The first, 
and form essen 8Toup, comprise ‘‘the minority of species (ex. Sporodinia) 
fan be 8 ao from branches of the same thallus or mycelium, and 
——_~ 0m the sowing of a single spore.” The second group, termed 
4 Brak 
40; 205~ mame, A. F., Sexual reproduction in the Mucorineae. Proc. Am. Acad. 
