1896.] Botany. 671 
J. nigra L.—Massachusetts to Ontario and Minnesota, south to the 
Gulf. 
The paper is accompanied by twenty five plates of trees, bark, buds, 
leaves and fruits.—CHARLES E. BESSEY. 
Diseases of Citrous Fruits.—This recently issued bulletin (8) of 
the Division of Vegetable Pathology, of the U. S. Department of Agri- 
culture, prepared by W. T. Swingle and H. J. Webber is a valuable 
contribution to science as well as horticulture. The diseases discussed 
are Blight, Die-back, Scab, Sooty-mold, Foot-rot, and Melanose. Eight 
good plates (three colored) accompany the paper. 
Mulford’s Agaves of the United States.—In the seventh vol- 
ume of the annual report of the Missouri Botanical Garden, Miss A. 
Isabel Mulford publishes a monograph of the genus Agave so far as the 
species native to or growing spontaneously in the United States, are con- 
cerned, Sixteen species and four varieties are recognized, distributed 
as follows: 
A, virginica L.—Maryland to Florida, Indiana, Missouri and Texas. 
_ A. virginica var. tigrina Englem.—South Carolina. 
A. variegata Jacobi.—Lower Rio Grande Valley, Texas. 
A, maculata Regel.?—southern Texas. 
A, schottii Engelm.—southern Arizona. 
A, schottii var. serrulata n. var.—Rincon Mts., Arizona. 
A, parviflora Torrey —Mts. of Arizona. 
A. lechuguilla Torrey.—west Texas and east New Mexico. 
A. utahensis Engelm.—Utah, northern Arizona, southern California 
and Nevada. 
A. deserti Engelm. —southern California. 
A. applanata Lemaire.— as. 
A. applanata var. parryi (Engelm.) —southern New Mexico to cen- 
tral Arizona. 
A. applanata var. huachucensis (Baker).—Huahuca Mts., Arizona. 
A, shawii Engelm.—southwestern California. 
A. palmeri Engelm.—southeastern Arizona and southwestern New 
Mexico. 
A, asperrima Jacobi.—Spontaneous near San Antonio, Texas. = 
A. americana L.—Spontaneous in southern Texas. 
A. rigida sisalana Engelm.—Naturalized in Florida. 
A. decipiens Baker.—southeastern Florida. 
A. sp.—Florida. 
A. sp.—Texas. 
