| OCR Text |
Show 446 GENLISEA ORNATA. CHAP. XVIII. GENLISEA. This reinarkable genus is technically distinguished. from U tricularia, as I hear fro In Prof. 0 liver, by havinO' a five-partite calyx. Species are found in several parts of the world, and are said to be "herbm annum paludosre." . . . Genlisea ornata (Brazil).-- This species has been described and figured by Dr. Warming,* who sta~es that it bears two kinds of leaves, called by him spathulate and utricu~iferous. The latter include cavities. and as these differ Inuch from the bladders of the fore~oing species, it will be con:venient to speak of them as utricles. The accompanying figure (fig. 29) f one of the utriculiferous leaves, about thrice en~ aro·ed will illustrate the following desci·iption by my n° w'hich agrees in all essential points with that ~~v~n by Dr. Warming. The utricle (b) is formed by a slight enlargement of the narrow blade of the leaf. A hollow neck ( n ), no less than fifteen times as long as the utricle . itself, fo:ms a passag~ from the transverse slit-like onfice ( o) Into the cavity of the utricle. A utricle which measured :t6 of an inch (·705 mm.) in its longer diameter ~ad a neck +% (1 O· 583 Inn1.) in length, and 1 6 0 of ~n Inch ( ·2.54 n1m.) in breadth. On each side of the onfice there IS a long spiral arm or tube (a) ; the s~ruct~re of V: hich will be best understood by the following Illustration. Take a narrow ribbon and wind it spirally round a th.in cylinder, so that the edges come into contact along Its whole length; then pinch up the two ed~es so .as to form a little crest, which will of course wind spuall Y "' "Bidrag til Kundskaben om Lentibulariacere," Copenhagen, 1874. CHAP. XVIII. STRUCTURE OF THE LEAVES. 447 round the cylinder like a thread round a screw. If the cylinder is now removed, we shall have a tube like on of the spiral arms. Tho two projecting edges are not actually united, and a needle can be pushed in easily between them. They are indeed in many places a little separated, fonning narrow entrances into the tube · . ' but this may be the result of the drying of the specinlens. The lamina of which the tube is formed seems to be a lateral prolongation of the lip of the orifice ; and the spiral line bet-ween the two projecting edges is continuous with the corner of the orifice. If a :fine bristle is pushed down one of the arms, it passes in to the top of the hollow neck. vVhether the arms are open or closed at their extre-mities could not be determined, as all the specimens were broken ; nor does it appear that Dr. Warming ascertained this point. So much for the external structure. Internally the :1 -J ··--··- 0 j ········-·· ··- ~ r:~ · ···········- b ·········-···- ········· [ FIG. 29, ( (.r'enlisea o1·nata.) Utriculiferous leaf ; ('nlarged about three times. l Upper part of lamina of leaf. b Utricle or bladder. n Nrck of utricle. o Orifice. a Spirally wound arms, with their ends broken off. lower part of the utricle is covered with spherical papillre, formed of four cells (sometimes eight according to Dr. Warming), which evidently answer to the quadrifid processes within the bladders of Utricularia. |
