88 
tern flora of both continents had a common origin in an ancient - 
flora which prevailed over a wide and now submerged area. IL 
List of a collection of Plants from Guadalupe Island, made by Dr. 
Edward Palmer, with his Notes. III. Descriptions of New Species 
of Plants, chiefly Californian, with Revisions of certain Genera, 
viz: Trifolium, 39 species; Lathyrus, 13 species; Megarrhiza, 5 
species; Peucedanum, 20 species.—2. The American Naturalist, 
April, contains among its botanical matter Mr. Watson’s contribution 
on the flora of Guadalupe Island mentioned above, and the results of 
Mr. L. H. Ward's investigations of the eccentricity of the pith of 
Rhus Toxicodendron, (Vid. Buttetin, VL, p. 47). Mr. Ward con- 
cludes that there is a relation between the thickening of the stem 
and the development of the rootlets. He does not seem to have 
studied Ampelopsis.—3. In the American Journal of Science and 
Arts for March are a number of interesting notices by Dr. Gray, 
e. g. of Dr. Engelmann’s Notes on Agave, of Duval-Jouve’s Struc- 
ture of the leaves of Grasses, Gymnocladus in China, Das Hausto- 
rium der Loranthaceen, The writer of the latter states that the vas- 
cular bundles of the parasites communicate with those of the plants 
on which they are growing. Pilostyles Thurberi, A Gray, must be an 
interesting study.—4. Harvard University has issued its Prospectus 
of Summer Instruction in Science for 1876. The courses in Pheeno- 
gamic and Cryptogamic Botany will begin July 7th, and eontinue 
six weeks. Applications should be made before June Ist, for the 
former, to Prof. G. L. Goodale, Cambridge, Mass. ; for the latter to 
Prof. W. G. Farlow, 6, St. James’ Ave., Boston, Mass.—5. Hurd & 
Houghton purpose issuing Wild Flowers of North America, illus- 
trations by Isaac Sprague, text by Prof. Geo. L. Goodale. The work 
will be expensive but will no doubt be done in the best manner. 
been discovered here, and has the best claim to be considered a 
variety of any form of that protean species, I think it would be 
well to make a note of the discovery. Gro, E. Davenport. 
Boston, March 24th. : 
§ 91. Acanthospermum xanthoides, DC.—This plant is abun- 
dant in the streets of Aiken and Augusta, having appeared within 
the past ten or twelve years—supposed to be brought from South 
America in wool for the Augusta factories, [WR 
Errata.—§ 83, 1. 7, for “fife” read ‘‘foot”: p. 82, 1. 24, for “18%8* read 
sOUR51 
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