III.] CAR YOPHYLLA CEsE. 7 1 terminates in a very viscid disk. When the proboscis of an insect is forced down the tube in search of honey, it comes in contact with this viscid disk, and being thus rendered adhesive, when it is withdrawn carries some of the pollen with it, and thus conveys it to the… … and is thus accumulated in the stigmatic hollow. Polygala vulgaris is sometimes blue and sometimes pink ; why is this ? It is, moreover, a variable species in other respects, as for instance in the size and pro¬ portions of the different leaves. The use of the curious finger-formed processes has…
Flowers -- Color · Plants -- Variation · Fertilization of plants
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