1887. | ; BOTANICAL GAZETTE. 213 
Notes were made on a few scattered plants on eighteen 
days between June 23 and August 17. This is the only spe- 
cies on which no bumble-bee was seen. By far the most 
abundant visitors are the butterflies. : 
& 
1 2 8 Le 
o =) fo ome o 
Flares | Baio 
< ae | eae 
With pollinia 6 7 1 15 
Without pollinia “3 7 
Dot Ak 1 } 32 
ASCLEPIAS PURPURASCENS.—The anther wings catch the 
hairs of the tarsi in all of the cases observed. 
The hoods of the reddish purple flowers are long and 
narrow, their tips being much longer than the anthers (fig. 
2). In the back of the hood is a process which projects 1n- 
ward to meet the broad horn, and thus completes the parti- 
tion between the very narrow honey receptacles. 
i my neighborhood A. purpurascens blooms first, when 
bumble-bee workers and Sphegide are least abundant, and 
shows a greater preponderance of butterflies than in A. tube- 
rosa 
: watched a few plants on seven days between June 2 
and 19. 
—_—$<<—$—— 
‘ 
“Tle oe ey oe 
e/a] ¢ [ee 
’ Bedi oi lBit og 
wa Bel Blo Gs die col se 
With pollinia s ey 3 ee 
Without pollinia 5 11 16 
i aoa aa get arte Rae Coe 
ASCLEPIAS IN GENERAL.—The hoods are broad so that 
the intervals between them are narrow. In order that the 
egs of insects may be readily caught between them, they 
Project strongly throughout and are open at the summit. 
