106 
on which it grows, says it has been there to his knowledge at least 
25 years; it is confined to a space not more than an acre in extent, 
and while it does not incline to spread much, it shows no signs of 
disappearing. 
The O. vulgaris may be distinguished from the O. Rafinesquii 
by its paler joints, fewer petals, and the minute leaves being shorter, 
more ovate and appressed. Having now fully identified Opuntia 
vulgaris as a New Jersey plant, it would be interesting to know 
whether it may not be found in other localities than the one above 
mentioned. Isaac C. MarrinDALe. 
CampEn, N. J., August 12, 1876. 
§ 113. Tilia Americana, L.—I recently came across a tree of this 
species in Weymouth, Mass., the leaves of which instead of being 
acuminate are rounded or even a little notched at the extremity. 
Has such a form been before observed ? H. Witiry. 
§ 114. Dimorphism.—I have noticed a decided dimorphism in 
the flowers of Bouvardia leiantha. One form has the stigmas quite 
exserted and the limb rather narrow; in the other form the limb is 
broader and the stigmas included. Of course there is a correspond- 
ing difference in the position of the stamens. As dimorphism is 
very characteristic of the Rubiacene I dare say that this observa- 
tion has been made by other students, only I have never happened 
to see it, W. W. Baier. 4 
$115. South Jersey Fungi.—Descriptions of some new species 
found at Newfield, New Jersey, by J. B. Exnis. 
(Continued from Vol. VI., No. 14.) 
17. Helicosporium auratum, 2. sp.—On decaying wood of Acer 
rubrum lying on the ground, October, 1875. Flocci erect, sparingly 
branched, clavate above, spores with 12-15 convolutions closely 
coiled into oblong-elliptical masses about .0015’ in length. Color 
of the whole plaut golden yellow. Very minute, appearing to the 
naked eye like a sprinkling of yellow dust. Structure of the spores 
the same as in H. ellipticum, /&%. Found but once and very spar- 
ingly, but apparently quite distinct. 
_ 18. Sphzeronema hispidulum, x. sy.—On dead branches of Nyssa 
multiflora, October. Perithecia scattered, linear-clavate, acute, 
black, under the lens minutely hispid-pubescent, about 34/ high. 
Spores linear-lanceolate, curved, 8-10 septate, of a pale yellowish 
tint except the acute hyaline extremities, .0025’ x 0002’. Globule of 
Spores whitish, base of the perithecia somewhat enlarged and 
clothed with longer softer hairs. 
19. Spheronema hystricinum, x. sp.—On dead Viburnum, 
mature in June. Perithecia about one line high, cylindric-subulate, 
acute, transversly rugose, nearly black but with a faint rufous 
tinge especially when moist. Spores hyaline, areuate, narrow, 
acute, 3-4 nucleate, 001’ long, or with the pedicel, which otten 
remains attached to one end, .0015’. Terminal globule minute, 
hyaline or with a faint tinge of rose color. he stems and branches 
on which this fangus occurs are covered so thickly by it as to 
appear hispid. The tip of the spores is acute but not prolonged as 
in the preceding species, , 
