1896,] Flowers and Insects, 271 
Access to it is impeded by the segment lying close to the op- 
posite filament. The long anthers surpass the style. The 
outer three begin to discharge their pollen before the others, 
and the dehiscence begins at the base of the anther and pro- 
ceeds upwards. The flowers are homogamous. The three 
divisions of the style are widely divergent, so that the stigmas 
are protruded between the anthers. hey thus come in the 
way of a bee crawling in between the anthers and sepals. A 
bee laden with pollen will invariably effect cross-pollination, 
fit visit the flower early, and it may accomplish the same 
result later. But after the line of dehiscence has reached the 
stigmas, there is a chance of spontaneous self-pollination. 
Cross-pollination commonly results in cross-fertilization be- 
tween distinct plants. 
The observations of Trelease, at Madison, give results es- 
sentially agreeing with the above account. He saw the flow- 
"s visited by bumble bees. : 
n my neighborhood, the blooming season is from April 
12th to May 6th. April 20th, 23d, 25th, 26th and 29th, the 
following bees were observed on the flowers: 
, de: (1) Bombus separatus Cr. 9, s.; (2) B. ridingsii Cr. 9, s.; (3 
“americanorum F. 9, s.; Andrenide: (4) Andrena vicina Sm. , s. & c. 
Ps (5) A. pruni Rob. 4, s. 
The flowers are evidently adapted to Bombus females, the 
only sex flying during the blooming season. The pollen col- 
lecting visit of Halictus cylindricus 9 in the Berlin Garden (1) 
‘No significance. 
On the literature of Uvularia see: : 
(1) Loew, Beobachtungen iiber Blumenbesuch von Insekten an Frei- 
Sgunilien. 2:1 5. 1887.—(3)Kerner, Pflanzenleben 2: 173, 330. 1891- 
ihe scatter, Notes on pollination. Bot. Gaz 21. Ja. 1892. 
den 
flow 
95 
bi, Was doubtful about the occurrence of nectar, 
"nical Garden at South Hadley, Mass., Miss Carter (3 
eo its Presence and says that it is secreted by septal 
“ete At first the mouth of the flower is closed by the 
"S. Later the petals expand further, the stamens sep- 
