1904] CURRENT LITERATURE 75 
Hom (zdem 445-464), in his 20th “ Studies in the Cyperaceae”’ has presented 
a natural classification of Vigneae and Carices genutinae, illustrating it by 
numerous species from various parts of the world which have been studied 
by the author, and were represented by sufficient material. In the Vzgneae 
15 sections are named, all excepting one being new; and in the Carices 
genuinae 24 sections are recognized, 11 of which are new. The classification 
follows the principles suggested by Drejer.—A. A. EATON (Fern Bull. 12 : 108- 
114. 1903) has described three new varieties of Eguisetum hiemale—— HH. DE 
BolssIEu (Bull. Herb. Boiss. II. 3 :837-856. 1903), in a paper presenting the 
Umbelliferae of China, describes We/opterygium (Symrnieae) as a new genus 
with two species, and also new species under Pimpinella, Seseli, Ligusticum, 
Selinum, Pleurospermum, Angelica, Peucedanum, and Heracleum.— M. L. 
FERNALD (Rhodora 5: 247-251. 1903) has described a new Kobresia from 
Maine.—A. A. EATON (dem 277-280) has described three new varieties of 
Isoetes from Massachusetts.— R. MAIRE and P. A. SACCARDO (Ann. Myco- 
logici 1:417-419. 1903) have described a new genus (Didymascella) of 
Phacidiaceae._-GEo. V. NASH (Torreya 3: 101-102. 1903) has described a 
new Aletris from Florida—G. N. Best (Bull. Torr, Bot. Club 30: 463-482. 
pls. 15-16. 1903) has published a revision of the North American species of 
Leskea, recognizing 15 species and varieties, four o which are new.— 
Marcus E. Jones (Contrib. Western Bot. 11) has described a new species 
of Leucothoe, has discussed western Nyctaginaceae, describing a number of 
new species under Eriogonum, and has presented his views concerning several 
western Chenopodiaceae, describing new species under Atriplex.— ALICE 
Eastwoop (Bull. Torr. Bot. Club 30: 483-502. 1903), ina paper entitled “ New 
species of western plants,” has described new species under Zygadenus, 
Allium, Fritillaria, Iris, Chorizanthe, Spraguea, Silene, Eschscholtzia (2), 
Arabis, Cleomella, Wislizenia, Lathyrus, Clarkia, Scutellaria (3), Fraxinus, 
Convolvulus, Sphacele, Monardella, Lappula, Symphoricarpos (4), Echino- 
cystis, Nemacladus, Agoseris, and Crepis.—O, VON SEEMEN (idem 634-636) 
has described three new species of Salix from California and Nevada.— 
RECENT CONTRIBUTIONS CONCERNING MYCORHIZA. Fungi have long 
been associated with certain liverworts, but NEMEC* was among the first 
to make a careful study of the subject ; it was his belief that they characterize 
the Jungermanniaceae rather generally, but that they are rare or absent in the 
Marchantiaceae. STAHL,” supposing this distinction to be true, applied his 
mycorhiza theory to the liverworts, considering the Jungermanni to have 
weak transpiration, abundance of sugar, and mycorhiza, while the Marchan- 
tiaceae have strong transpiration, abundance of starch, and no mycorhiza. 
23 Ber. Deutsch. Bot. Gessells. 17 : 311-317. 1899. 
24Jahrb. Wiss. Bot. 34: 539-668. 1900. See Bot. Gaz. 30:68. 1900. 
