251 
dromus it is stated that its fruit was unknown at the time that 
volume was issued, 
Rhus Toxicodendron. (Gard. Chron., xxvi., p. 502 and p. 598.) 
Our poison ivy is grown in English nurseries under the name 
Ampelopsis Japonica, and its dangerous character seems to be 
doubted by contributors to the Gardener’s Chronicle, though the 
editors try to impress on them the chance of serious consequences 
if the leaves or shoots are handled. The glorious autumn color- 
ation of its foliage is much admired in England, where the native 
shrubs are in general far inferior in this respect to our own. 
Sarracenias.—(Garden, xxx., pp. 366, 367; plate 566.) 
Descriptions of the species, and of their numerous. artificial 
hybrids, 15 of which are noted. The plate illustrates S. Moore? 
(S. flava x S. Drummondi) and S. Popei (S. flava x S. rubra.) 
Thalictrum.—North American Species of. William Trelease. 
(Proc. Bost. Soc. Nat. Hist., xxiii, pp. 293-304; one plate 
and two cuts. Also eenriatee: ) 
In this revision of our Meadow Rues, which may be regarded 
as preliminary to Dr. Gray’s treatment of the genus in the 
Synoptical Flora, twelve species are recognized, as against four- 
teen enumerated by Dr. Watson in his Bibliographical index, 7. 
anemonoides being referred to Amemonella, Spach, and 7. 
Wrightit, Gray, to a variety of 7. Fendleri, Engelm. The 7 
Cornutt of Gray’s Manual is referred to 7: polygamum, Muhl., 
and Prof. Trelease finds that it is never glandular, so that all 
glandular plants of the polygamo-dicecious section appear to be 
referable to TZ. purpurascens, L,; the var. ceriferum, Austin, is 
only an extreme state of the species. In the vicinity of New 
York we have found that 7. purpurascens generally blooms 
much earlier than 7: polygamum, so that when the former has 
mature fruit, the latter is in its most conspicuous state in the 
swamps and meadows. TZ. Kemense, Fries, of Alaska, is reduced 
to 7. minus, L., var. Kemense, and ZT. Fendleri, Engelm., var. 
polycarpum, Torr., is T. polycarpum, Watson. Prof. Trelease 
prefaces the systematic portion of his paper with a discussion of 
the structural features of the genus, and of the adaptation of the 
various species to insect or wind pollination. 
Thistles. Grant Allen. (Pop. Sci. Month., xxx., pp. to1-108.) 
