Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . INDETERMINATE INFLORESCENCE. 213 determinate infloresence, with the primary axis elongated, and theflowers destitute of pedicels or with only very short ones. Twovarieties of the spike have received independent names, viz. theSpadix and the Ament. 390. A Spadix is a fleshy spike enveloped by a large bract or mod-ified leaf, called a Spathe, as in Calla palustris (Fig. 313), theIndian Turnip (Fig. 314), and the Skunk Cab
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . INDETERMINATE INFLORESCENCE. 213 determinate infloresence, with the primary axis elongated, and theflowers destitute of pedicels or with only very short ones. Twovarieties of the spike have received independent names, viz. theSpadix and the Ament. 390. A Spadix is a fleshy spike enveloped by a large bract or mod-ified leaf, called a Spathe, as in Calla palustris (Fig. 313), theIndian Turnip (Fig. 314), and the Skunk Cabbage (Fig. 1205).. 391. An Ament, or Catkin, is merely that kind of spike with scalybracts borne by the Birch (Fig. 312), Poplar, Willow, and, as to oneof the two sorts of flowers, by the Oak, Walnut, and Hickory, whichare accordingly called amentaceous trees. Catkins usually fall offin one piece, after flowering or fruiting, especially sterile catkins. 392. The Head, or Capitulum, is a globular cluster of sessile flowers,like that of Clover, the Button-Bush (Fig. 320), and the balls of theButtonwood or Plane-tree. It is a many-flowered centripetal in-florescence, in which neither the primary axis nor the secondaryaxes are at all lengthened. We may view it either as an umbelwithout any pedicels, or as a spike with a very short axis. Gen-erally it is of the latter character, as is evident in a Clover-head,where what was first a head frequently elongates into a spike as itgrows older. FIG. 313, 314. Spadix of Calla and of Arum, with the spathe. 315. A raceme of A cyme. 318. Panicle of Meadow-G
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
