. Insectivorous plants . Carnivorous plants; Plants. DEOSEEA KOTUNDIFOLIA. [Chap. I. iDroader than long, but this was not the case in the one here figured. The whole upper surface is covered with gland- hearing filaments, or tentacles, as I shall call them, from their manner of acting. The glands were counted on thirty-one kaves, but many of these were of unusually large size, and the average number was 192 ; the gi-eatest number being 260, and the least 130. The glands are each suiTounded by large drops of extremely viscid secretion, which, glittering in the sun, have given rise to the plant'
. Insectivorous plants . Carnivorous plants; Plants. DEOSEEA KOTUNDIFOLIA. [Chap. I. iDroader than long, but this was not the case in the one here figured. The whole upper surface is covered with gland- hearing filaments, or tentacles, as I shall call them, from their manner of acting. The glands were counted on thirty-one kaves, but many of these were of unusually large size, and the average number was 192 ; the gi-eatest number being 260, and the least 130. The glands are each suiTounded by large drops of extremely viscid secretion, which, glittering in the sun, have given rise to the plant's poetical name of the Fig. 2. (Drosei-a rotundifolia.) Old leaf viewed laterally; enlarged alKiut five times. The tentacles on the central part of the leaf or disc are short and stand upright, and their pedicels are green. Towards the margin they become longer and longer and more inclined outwards, with their pedicels of a purple colour. Those on the extreme margin project in the same plane with the leaf, or more commonly (see fig. 2) are considerably reflexed. A. few tentacles spring from the base of the footstalk or petiole, and these are the longest of all, being sometimes nearly i of an inch in length. On a leaf bearing altogether 252 tentacles, the short ones on the disc, having green pedicels, were m number to the longer submarginal and marginal tentacles, having purple pedicels, as nine to sixteen. A tentacle consists of a thin, straight, hair-like pedicel, carrying a gland on the summit. The pedicel is somewhat flattened, and is formed of several rows of elongated cells, filled with purple fltiid or granular matter.* There is, however, a narrow zone close beneath the * According to Nitschke ('Bot. Zeitung,' 1861, p. 224) the purple fluid results from the metamorphosis of chlorophyll. Mr. Sorby examined the colouring matter with the spec- troscope, and informs me that it consists of the commonest species of erythrophyll, " which is often met with in leave
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectplants, bookyear1888
