4 
other hand, Apios tuberosa, Moench, scems to compensate by, its- 
tubers for the very irequent abortion of its pods. ‘These plants, with 
others, Specewuriu, for example, afford an interesting subject for 
investigation on this point. W. AG 
7. Lemna Valdiviana, Philippi, (L. Torreyi, Austin) grows in ponds 
near Patchogue, Long Island. Its habit is very similar to 4. tri 
sulca, growing under water in masses. I have found only sterile 
plants. T. Frage 
8. Nasturtium palustre, L.—The typical form (smooth, with oblong 
ods) seems to be quite common about New-York, especially along 
the Harlem Rail-Road; it is more abundant than the hispid variety. 
: 8 To. AS 
9. Arabis lavigata, DC., grows in abundance on the low, rocky 
ground just southeast of Yonkers. 
Soh A RRO ol ate $e ea hy eae eae eS ts eae ee ee 
10. Nesperis matronalis seems thoroughly established, especially 
in the ditches aloug the rail-roads, es AL 
IL Bromus s'erilis, T., is very abundant along the Hudson River It. 
R., from Manhattanville to Yonkers. It comes very early and lasts — 
but a short time; only dead specimens can usually be obtained after 
June. : a. 0s oe 
12. The Varian “Sycamore.” more properly Plane-tree, which stood 
on the west, side of Broadway, between 26th and 27th streets, was 
cut down the first weekin November. Its diameter was more than 
four feet near the ground, Just at the street level there was.a hol- 
low place on one side, but on the whole it seemed remarkably sound. 
Some one might give us a history of the stately old giant. Two 
young observers Who counted the rings made out 95, but the rough- 
ness of the sections made accuracy difficult. soe 
13. Polymnia Uvedalin, L.—Dr, T. F. Allen found a’small patch of 
this plant near the Weehawken Ferry in 1864. It was still to be 
found there this summer, but in danger of destruction, with the — 
cliffs that sheltered it. Dr, Gray, by some accident, refers this lo- 
tig to P. Canadensis, There is no doubt about its being P. Uve- 
ia. : 
: Li. Rooks.—Dr. Torrey has received “Traité Général de Bo- — 
tanique,” by MM. Le Maout and Decaisne, with upwards of 5,500 
illustrations by Steinheil and Riocreux.—T. F. A. has Hegelmaier’s 
“Lemnaceen,” with 16 plates. He makes three genera, Wolfia, 
(including Griffith’s Grantia,) Zemna, and Spirodela, 1. Torreyi, 
Austin, was less perfectly described by Philippi, 1864, and named 
Valdiviona, from Valdivia, in Chili, where it was first found.—W. 
H. L. has C, K. Sprengel’s “Entdeckte Geheimniss,” 1793; often 
quoted by Darwin. vee 
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224 E. 10th-street. ~ ; he 
