Vol. THL., No. 7.) BULLBTIN OF THE TORREY BOTANICAL CLUB, — [New York, July, 1872, 
62, The Flower of Yucca and its Fertilization—The flowers of all the 
Species are more or less pendulous, open towards evening, and re- 
main wide open through the night and half close in the morning, 
continuing in that condition until one or two days afterwards, when 
they drop off, or, if fertilized, wither and become erect. The sagit- 
tate anthers open a little before the flowers do, curve backward, 
and contract to about one-fourth their former size, and thus expel Oe. 
the heavy, somewhat getitinous pollen-grains, which remain in dit / 
ferent little lumps within the flowers. What we usually call th 
stigma is the style, or rather, the three styles; these together form 
the stigmatic tube, their edges conniving and their inner sides, the 
inner coating of the tube, exhibiting the stigmatic surface. This 
tube is directly connected with the ovarian cells. The pollen, intro- 
duced into the tube, begins to develop and to enter upon its fune- 
tions. But, without artificial aid, it never gets into it. Nocturnal 
insects are the agents—in our gardens, at least, a white moth of the 
genus Tortrix. If, about sunset, when the flower is fully open, we 
take up the pollen-lumps from the flower, and, with a camel-hair 
_ brush, well introduce theth into the stigmatic tube, we may supply 
the action of insects wanting in Northern or European gardens, far 
away from che native home of the Yuccas, and succeed in producing 
it and seed, which thus far are almost unknown in cultivation. 
Sr. Louis, June, 1872. Dr. GrorGe ENGELMANN. 
53. Botrychinm matricariefolinm, A. Braun.—I send you a couple of = 
Specimens of this fern, from a locality in the neighborhood of Utiea = 
which I found last summer. : te 
I sent specimens to Prof. Eaton, who pronounced it B. matricarie- 
folium, and stated that he had received it from Lake Superior, and 
from Susquehannah Co., Pa. He also stated that almost the same 
thing was found in this vicinity several years ago, by Mr. Paine, but 
that the specimen sent him by Mr. Paine was so imperfect that he 
passed it over as a form of B. lanceolatum. : 
have not conferred with Paine about it; but, as he says nothing 
of it in his catalogue, it seems fair to conclude that he did not know 
of this locality. 
It grows on the sides of a shady ravine some four miles from the 
city. I found growing side by side with it; B. Virginicum, Swartz; 
B. Virginicum, var. gracile, Pursh; B. lunarioides, Swartz ; B. lanceo- 
latum, Angstroem. 
The snaeens I send were gathered June 29,1872. The locality 
is quite limited in extent, but the plant seems abundant. Why has 
not Prof. Eaton described cogs gti in the Manual? It is the 
Same as Wood’s B. neglectum, of course. ‘ : 
I found quite a ee 8 at the Mud Lake Swamp (Paine’s Cata- 
. 
logue) a few days ago—several specimens of Cypripedium spectabnile, : a 
Swartz, with the Inbal double, the two being jh xa distinct — 
throughout, and about two-thirds the size of the ordinary flower, 
and all the other parts of the flower single. Epwix Hot. — 
Unica, N. Y., July 7, 1872. : 
54, Bees puneturing Flowers.—This spring we received from Lewis 
