Page:An introduction to physiological and systematical botany (1st edition).djvu/256

 226 a right to the name of fulcrum, is found in the Annona hexapetala, ''Linn. Suppl.'' 270. The flower-stalk of this tree forms a hook, and grasps the neighbouring branch, serving to suspend the fruit, which is very heavy, resembling a bunch of grapes, and indicates the plant in question to be either a Michelia or an Uvaria.

6. Glandula, a Gland, is defined by Linnæus as a little tumour discharging a fluid. Such are abundant on the stalk and calyx of a Moss Rose, ''Curt. Mag. t. 69, and between the serratures of the leaf of Salix pentandra, Bay-leaved Willow; also on the footstalks of Viburnum Opulus, Engl. Bot. t.'' 332, and various species of Passion-flower. The liquor discharged is in the first mentioned instances resinous and, in the latter a sort of honey.

7. Pilus. A Hair. This, according to the Linnæan definition, is an excretory duct of a bristle-like form. Such it undoubtedly is i t [sic] the Nettle, Urtica, ''Engl. Bot. t. 148, and t.'' 1236, whose bristles are tubular and