. The elements of botany for beginners and for schools. Botany. Poppy, or burst irregularly in some part, as in Lobelia and the Snapdragon; but coiiunouly it splits open (or is dehiscent) lengthwise into regular pieces, called Valves. 371. Regular Dehiscence in a capsule takes place in two ways, which are best illustrated in pods of two or three cells. It is either Loculicidal, or, splitting directly into the loculi or cells, that is, down the back (or the dorsal suture) of each cell or carpel, as in Iris (Fig. 395); or Septicidul, that is, splitting through the partitions or septa, as in St.
. The elements of botany for beginners and for schools. Botany. Poppy, or burst irregularly in some part, as in Lobelia and the Snapdragon; but coiiunouly it splits open (or is dehiscent) lengthwise into regular pieces, called Valves. 371. Regular Dehiscence in a capsule takes place in two ways, which are best illustrated in pods of two or three cells. It is either Loculicidal, or, splitting directly into the loculi or cells, that is, down the back (or the dorsal suture) of each cell or carpel, as in Iris (Fig. 395); or Septicidul, that is, splitting through the partitions or septa, as in St. John's-wort (Fig. 39G), Rhododendron, etc. This divides the capsule into its compo- nent carpels, which then open by their ventral suture. 372. In loculicidal dehiscence the valves nat- urally bear the partitions on their middle; in the septicidal, half the thickness of a partition is borne on the margin of each valve. See the annexed diagrams. A variation of either mode occurs when the valves break away from the partitions, these remaining attached in the axis of the fruit. This is called Spptifragal&(^\\vs,^mo.^. One form is seen in the Morning-Glory (Fig. 400). 373. The capsules of Rue, Spurge, and some others, are both loculi- cidal and septicidal, and so split into half-carpellary valves or pieces. 374. The Silique (Fig. 401) is the technical name of the peculiar pod of the Mustard family; which is two-celled by a false partition stretched across between two pa- rietal placentae. It generally opens by two valves from below up- ward, and the placentae with the paititiou are left behind when the valves fall off. 375. A Silicle or Pouch is only A short and broad silique, like that of the Shepherd's Purse, Fig. 402, 403. Fig. 395. Capsule of Iris, with loculicidal dehiscence; below, cut across. Fig. 396. Pod of a Marsh St. John's-wort, with septicidal dehiscence. Fig. 397, 398. Diagrams of the two modes. Fig. 399. Diagram of septifragal dehiscence of the loculicidal type.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
