172 The Botanical Gazette. (April, 
The pollinia are quite small and occupy only the upper portion of 
the anther. They are almost cylindrical and are attached to the an- 
ther by placentz which break away with the pollinia forming a hyaline 
line along their outer sides as arranged in pairs. 
The pollinia of Asclepias with which they are usually compared are 
larger, occupying the anther from base to apex. They are quite flat 
and do not exhibit the hyaline line seen in Enslenia.—Gero. H. SHULL, 
Sulphur Grove, Ohio. 
EXPLANATION OF PLaTE XIII.—Fig. 1. slg cat Nutt., a node a 
cluster of flowers. X 1.—Fig. 2. Diagrammatic view of the tedloreseence re- 
duced to a single plane.—Fig. 3. Anther with its sa e.  X 10.—Fig. 4 
Section near the summit of the central column showing the aig ey and 
attachment of the pollinia. X 27.—Fig. 5. Section near the base of the cen- 
tral column showing anthers quite empty.  27.—Fig. 6. Pollinia. XK 32.-— 
Fig. 7. Pollinia of Asclepias incarnata L. X 32. 
On the development of the bulb of the adder’s-tongue.—WiTH PLATE 
XIV.—In the BoranicaL GazettE for February, 1894, I presented re- 
sults ot observations made in 1893, upon the adder’s-tongue, or spring 
Lily (Erythronium Americanum Ker.), and will here add, results of 
observations made in 1894 in hopes that as soon as the weather admits 
others will begin to make observations that may aid in determining 
questions of growth. . 
Here at New Brunswick, N. J., the flowers are about a week later 
than in the vicinity of Washington, D. C., and nearly a week earlier 
than in the vicinity of Springfield, Mass., the blossoms of the Ery- 
thronium being about their prime here on April 27th last year; the 
runners being at their best about May sth, and the seeds ripe June 
13th. The seeds are not easily found except when the exact spot 
where the plants grow has been previously noted carefully, for very 
soon after blooming the plants begin to decay and often the seeds 
ripen with the ovary on the ground, the remnants of the plant being 
prostrate and partly hidden by later growths of vegetation. By the 
first of May the profusion of bloom had passed and buds were found 
only in sheltered spots. 
In the vicinity of Washington the anthers of £. Americanum Ket. 
observed were almost invariably dark brown; here the anthers 
observed were most frequently yellow, although the brown anthers 
were not rare. No direct relation was observed between the color of 
the anthers and the blotching on the leaves, as dark anthers were 
found on some plants whose leaves were free from brown, but freely 
blotched with white. The yellow anthers are often found associated 
with leaves thickly sprinkled with brown spots. All stages between 
these two extremes were found. As regards fertility, no comparative 
