. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. rous, oreven hexandrous ; not only does nosuch tendency exist in the former, butthe reverse takes place, in the occa-sional increased sterility of the is scarcely any trace in Oro-banche of the glandular processes ofthe disk of Gesnerworts, or at leastnothing more than a thin glandularcoating to the base of the Figworts, to which their didyna-mous stamens have caused them to becompared, they are known by their 1-celled ovary and minute embryo ; as well
. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. rous, oreven hexandrous ; not only does nosuch tendency exist in the former, butthe reverse takes place, in the occa-sional increased sterility of the is scarcely any trace in Oro-banche of the glandular processes ofthe disk of Gesnerworts, or at leastnothing more than a thin glandularcoating to the base of the Figworts, to which their didyna-mous stamens have caused them to becompared, they are known by their 1-celled ovary and minute embryo ; as well as bytheir habit and parasitical mode of growth. In this respect they resemble Fir-rapes,from which they differ in their ovary being composed of 2, not .5 carpels, and intheir irregular unsjTnmetrical flowers, with epipetalous stamens. There can be littledoubt, however, that the nearest affinity of Broomrapes is to Gentianworts, with someof which, as for example, Voyria, they even correspond in their leafless scaly habit, andmoreover in their corolla adhering firmly to the base of the finiit which it covers when. CCCCXII Fig. CCCCXII.—Anoplanthus the section of it to show the embryo. 1. a flower cut open ; 2. a section of the ovary ; 3. a seed ; R R 610 OROBANCHACE^. [Perigynous Exogens. ripe. The gieat points of resemblance between Orobanche and Gesneiworts and Figwoitsconsist in their monopetalous didynamous flowers and bicarpellary polyspermous fruit ;and it is these which have led to the general opuiion that all the Orders are closelyallied. Such marks of agreement are doubtless important ; but they may be over-balanced by circmnstances of disagieement of more importance. One of these is theposition of the carpels with respect to the axis of inflorescence. In the whole categoryof personate, labiate, or irregular plants forming the Bignonial Alliance, the carpelsstand fore and aft with respect to the axis ; while in Gentianworts we have as univer-sally the two
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