The elements of botany for beginners and for schools . regular, and symmetrical blossom, and one as simple as such a blossomcould well be. Flowers are said to be Perfect (hermaphrodite), wlien provided with both kinds of essential or-gans, i. e. with both stamens and pistils. Complete, when, besides, they have the two sets of floral envelopes, namely, Fig. 221. Model of a simple pistil, with ovary cut across and slightly openedventrally, to show the ovules and their attacliment. Pro. 222. Flower of Sedum ternatum, a Stonecrop. FiQ. 223. Parts of same, two of each kind, .separated and displayed
The elements of botany for beginners and for schools . regular, and symmetrical blossom, and one as simple as such a blossomcould well be. Flowers are said to be Perfect (hermaphrodite), wlien provided with both kinds of essential or-gans, i. e. with both stamens and pistils. Complete, when, besides, they have the two sets of floral envelopes, namely, Fig. 221. Model of a simple pistil, with ovary cut across and slightly openedventrally, to show the ovules and their attacliment. Pro. 222. Flower of Sedum ternatum, a Stonecrop. FiQ. 223. Parts of same, two of each kind, .separated and displayed; the torus ovreceptacle in the centre; a, a sepal; b, a petal; c, a stamen; d, a pistil. 6 82 FLOWERS. [SECTION calyx and corolla. Such are completely furnished with all that belongs to a flower. Regular, when all the parts of each set are alike in shape and , when there is an equal number of parts in each set or circle of Flax-flowers were taken for a pattern in Section II. 16. But in them the five pistils have their ovaries as it were consolidated into one , Fig. 222, has the pistils and all the other partsfree from such combination. The flower is perfect,complete, regular, and symmetrical, but is not quiteas simple as it might be ; for there are twice as manystamens as there are of the other organs. Crassula,a relative of Sedum, cultivated in the conservatoriesfor winter blossoming (Fig. 224) is simpler, beingisostemonoas, or with just as many stamens as petals orsepals, while Sedum is diplostemonoas, having doublethat number: it has, indeed, two sets of stamens. 241. Numerical Plan. A certain number eitherruns through the flower or is discernible in som
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
