The elements of botany for beginners and for schools . or grow-ing inward of one of the sutures, so as todivide the cavity. 308. There are two or three terms which primarily relate to the partsof a simple pistil or carpel, and are thence carried on to the compoundpistil, viz.: — Ventral Suture, the line which answers to the united margins of thecarpel-leaf, therefore naturally called a suture or seam, and the ventralor inner one, because in the circle of carpel-leaves it looks inward or to thecentre of the flower. Dorsal Suture is the line down the back of the carpel, answering to Fig. 323. An
The elements of botany for beginners and for schools . or grow-ing inward of one of the sutures, so as todivide the cavity. 308. There are two or three terms which primarily relate to the partsof a simple pistil or carpel, and are thence carried on to the compoundpistil, viz.: — Ventral Suture, the line which answers to the united margins of thecarpel-leaf, therefore naturally called a suture or seam, and the ventralor inner one, because in the circle of carpel-leaves it looks inward or to thecentre of the flower. Dorsal Suture is the line down the back of the carpel, answering to Fig. 323. An inroUerl small leaf, such as in doulDle-flowered Cherry blossoms isoften seen to occupy the place of a pistil. Pio. 324. A simple pistil (of Isopyrum), with ovary cut ; the inner (ven-tral) face turned toward the eye: the ovules seem to be home on the ventral suture,answering to leaf-margins: the stigma above seen also to answer to leaf-margins. Pig. 325. Pod or simple pistil of Caltha or Marsh-Marigold, which has opened,and shed its SECTION 10.] PISTILS. 107 the midnb of the leaf,—not a seam therefore; but at maturity many fruits,such as pea-pods, open by this dorsal as well as by the ventral line. Placenta, a name given to the surface, whatever it be, which bearsthe ovules aud seeds. The name may be needless when the ovules growdirectly on the ventral suture, or from its top or bottom; but when thereare many ovules there is usually some expansion of an ovule-bearingor seed-bearing surface; as is seen in our Mandrake or 326. ^ • 309. A Compound PistU is a combination of two, three, or a greaternumber of pistil-leaves or carpels in a circle, united into one body, at least
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
