Trelease.] 
426 
[March 15, 
pollen is here sent in but one direction, namely, that which will 
place it on the part of the visitor most likely to come in contact 
with the stigma of another flower. 
Among the endless species, varieties and hybrids of Cape 
heaths there are many which do not differ essentially in their 
structure and mode of pollination from that which I have 
described, as may be seen by an examination of the plates of illus- 
trated works like Andrews ’ “ Heathery ” and Loddige’s “ Botan- 
ical Cabinet.” The union of the anthers may be seen in very 
many of them, and several show by the altered position of the 
stamens after their separation that this probably occurs elastically 
as in E. Wilmorei, e. g. E. longiflora (Bot. Cab., X, 983), and 
E. mutabilis (Bot. Cab., I, 46). 
While examining figures and descriptions of heaths, during the 
writing of this paper, I came across the curious sketch reproduced 
xn fig. 25 bis. It occurs in the “ Botanical Register,” II, 115, and 
represents the stamens of E. ardens, a short-flowered species 
from the Cape. It will be seen that the stamens are alternately 
longer and shorter, with the anthers united. In the description 
it is merely stated that the filaments are u ligulately linear, flat, 
tapered, bent with deep doubles, the lower of which slants out- 
wards.” Whether the artist misrepresented the case, or whether 
one whorl of stamens, presumably the outer, elongates more rap- 
idly than the other, cannot be said. In the latter case the marked 
crumpling of the longer stamens leads one to expect that their 
release would be attended with an explosion more marked than 
that in E. Wilmorei, and perhaps unite equal to that of Posoque- 
ria. As the flower seems adapted to .bees, and the expulsion of the 
pollen from the flower would bring it in contact with the proper 
part of their bodies, this is not improbable. At any rate the 
species is worthy of observation by any one having the opportu- 
nity to study it. 
In this large genus adaptations to birds, hvmenoptera and lepi- 
doptera, may be found in all grades of perfection ; among the 
melittophilous species may be mentioned the European species 
E. arborea, etc. This latter species is said by Hildebrand (1, 23) 
in his discussion of green-flowered anemophilous heaths to be 
capable of wind-fertilization. E. Aitoniana, E. Cliffordiana and 
E. tenuifolia are probably psychophilous. 
