> Vol. 34 No. 7 
; BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
JULY, 1907 
The stem of Ibervillea Sonorae * 
3 ALICE ADELAIDE Knox 
(WITH PLATE 24) 
_ Among the representatives of the Cucurbitaceae at the New York 
1 Botanical Garden is a group of plants of /éervillea Sonorae. They 
were brought from the southwest by Dr. D. T. MacDougal in 
- 1902, and are interesting because of their unusual character for 
Cucurbits as well as for their adaptation to desert conditions. A 
description of the plants is given by Miss J. T. Emerson collab- 
ting with Mr. W. W. Welker in a paper, in coarse of prepara- 
ten, on its chemistry and pharmacology (34). Ficures A and B 
show the Organographic characters of the species, both at the 
adu 
adult stage in its native habitat, and as a seedling from four to five 
old. The “large projecting root” (21) of Jbervillea in the 
imens in the greenhouses of the Botanical Garden reaches a 
aie of from 25 to 30 cm. In the desert this enormous 
red boulder. Frequently irregularities of shape give it still 
More the effect of stone, and it is only when the cortex is flecked 
off that one discovers the healthy green color beneath the super- 
Icial layer, [F rom the tubers arise yearly long flexible liana-like 
ts which reach a length of three or more meters. The shoots 
are round, smooth and green above, brown-gray and gray-spotted 
or streaked below.. The flowers are dioecious, the tendrils 
anched, and the leaves bright-green and twice three-cleft is is 
quently the case throughout the family. The fruit is said to 
. perch pursued in the laboratories of Barnard College during the winter of 
04-1 o 
(The BULLETIN for June, 1907 (34: 271-328, pi. 22, 27) was issued 26 Jl 1907. ] 
329 
