thy) Proceedings of the Botanical Club. 345 
- fore, an indirect way of explaining geotropism. A disc of 
_ cork, about five inches in diameter, to which the seedlings 
_ uepinned, and kept moist by constant dripping of water, is 
- tevolved from 400 to 1,200 revolutions per minute. The disc 
senclosed to prevent evaporation, and is adjustable at any 
igi. The disc is run by a small electric motor and. bat- 
— teries. 
_ DT. MacDoucaL: The sensitiveness of tendrils.—Read 
by Mr. Arthur. Many observations were brought forward to 
show that the supposed power of tendrils to discriminate be- 
- tween contact with their own organs and foreign bodies does 
--Wtexist, and that even those of the most sensitive species 
«coil about other tendrils upon the same plant. 
Ms. E.G. BRITTON: The Faeger collection.—The speaker 
--ftrated the efforts which had finally been crowned with suc- — 
_ 85, by which a very large collection of mosses, containing 
_Mity valuable exsiccati had been obtained from Geneva, for 
' Columbia College herbarium. 
j fe he ee MAN: The distribution of some woody plants 
F tin 4h Mong other items he noted that the umbrella tree 
an fen of the state, although it has been so reported. 
F thera — Observations on the pollination of Gno- 
3 sy rrensts.—The large flowers open just before ark, 
j ttemoon . \ sig Protrude as early as two o'clock in the 
' Toth, ” - nly a Single species of insect, a large sphinx 
RHE O'clock “n seen about the flowers. This comes about 
— Eewiy fF’ and is active until darkness sets in. ; 
MITH: The serious prevalence of root dis- 
2 bye 3 the roots, of which the cause is not 
Caio. {7 Various parts of the country, but especially 
Ne and prove very destructive to nursery stock of 
ie com and peach, as well as to other and older trees. 
i on Occurrence and injurious nature of the dis- 
In Cali ‘ 
“Gifomia was confirmed by Mr. Campbell. 
ere kes The prothallium of Botrychium.—Speci- 
W 
n by the speaker who spoke of its rarity in 
Se plant is . 1s of considerable size, remains attached until 
‘Mistake, © large, and yet might readily be overlooked, 
: : for 4 part of the root system. 
ah e use of personal names for spectes.— 
ent. to, * little use of them, there being less than one 
