504 General Notes. [ May, 
calyx, and supplies the honey; the stigma is two-lobed, the lower 
lobe being decidedly smaller (Fig. 3). There is a decided varia- 
tion in the length of the style, but I was unable to deduce any 
dimorphic arrangement from what I saw. Long-tongued bees 
visit the flower, and the case seems one of synacmy, the outer 
stamens, however, maturing first, and the ‘next in order— Aug. 
F. Foerste, Granville, Ohio. 
THE INTERNAL CAMBIUM RING IN GELSEMIUM SEMPERVIRENS.— 
Dr. J. T. Rothrock, at the meeting of the Botanical Section of 
the Academy of Natural Sciences of Philadelphia, held February 
9, 1885, called attention to the internal cambium ring in the stem 
of Gelsemium sempervirens. It might well be designated as the 
inner cambium. His attention was attracted by the fact that in a 
stem of three-eighths of an inch diameter, the pith was actually 
less in diameter than in a ¢wig of a quarter the size of the stem. 
Microscopic examination showed that in the larger stem there 
were ordinarily four or more points, at which a well-defined swel- 
ling curved inward from the circumference of what should have 
been the pith-cavity. These swellings resolved themselves when 
closely examined into: 
‘I. Toward the center an imperfectly defined membrane, resem- 
bling cuticle, which was not always present. 
2. One or more rows of large cells like the parenchyma we 
find under the epidermal layer. 
3. Several poorly defined layers of smaller cells, such as often 
mark the limits of growth in bark. 
4 The frequent presence uf bast fibers or of sclerenchyma 
cells, : 
5. An evident layer of thin-walled, square cells, closely resemb- 
ling, though somewhat smaller than those of the external cam- 
bium. They showed signs of division, which indicated that they 
were still a living tissue. _ 
in the very large stems a smaller pith than in those of moderate 
_ size. In this there was nothing comparable to the inner cambium. 
He also remarked that for the past two winters his attention had 
__ been called to the presence of considerable quantities of chloro- 
_ phyllin the pith of Lycium vulgare. This was not confined to 
_ the smallest stems, but was found also in those of over a quarter 
of an inch in diameter, and where of course a considerable belt of 
