. Notes on the life history of British flowering plants. Botany; Plant ecology. LENTIBULARIACE^ 277 closed by a flap (Fig. 177, 178, c), whicli plays freely on a rim or collar. This flap is easily pressed inwards, but then springs back into place. Minute fresh-water Crus- tacea and insects seem to have a singular fascination for entering, and once in, as they cannot open the flap from inside, they are doomed. Darwin found in one bladder as many as ten minute Crustacea. The walls of the en- trance (Fig. 177, a) are slightly contracted in the centre like (though not so much as) an hour- glass ;
. Notes on the life history of British flowering plants. Botany; Plant ecology. LENTIBULARIACE^ 277 closed by a flap (Fig. 177, 178, c), whicli plays freely on a rim or collar. This flap is easily pressed inwards, but then springs back into place. Minute fresh-water Crus- tacea and insects seem to have a singular fascination for entering, and once in, as they cannot open the flap from inside, they are doomed. Darwin found in one bladder as many as ten minute Crustacea. The walls of the en- trance (Fig. 177, a) are slightly contracted in the centre like (though not so much as) an hour- glass ; and the flap (6), shown by the dotted line, being nearly semi- circular, can open inwards, but not outwards. U. vulgaris.— The arrangement of the flower in some respects re- sembles that of Antirrhinum (Snapdragon). The two lips of the corolla completely close the flower. The upper lip is simple : the lower consists of three parts (Fig. 175, 1) —(1) the spur which contains the honey; (2) the arched prominence which abuts against the upper lip and closes the flower; and (3) the lateral projecting lobes. These serve as an alighting stage for the. Fio. 177.— Utricularia vulgaris. Opening of bladder, seen in front; much enlarged, a, "wall of opening ; 6, outline of the flap ; o, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lubbock, John, Sir, 1834-1913. London, New York, Macmillan and Co. , Ltd.
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Keywords: ., bookauthorlub, bookcentury1900, bookdecade1900, booksubjectbotany
