Botanique élémentaire . ds, meurt vers le bas. Les feuilles sont situé un peu au-dessus de la médiane de la thestem. Ils sont en face et le nombre est deux onebeing, chacun divisé en trois lobes dentées, faisant ce qu'on appelle feuille d'acompound. 647. Certaines parties de la fleur.-Les fleurs sont plusieurs, et ilssont porté par des tiges assez longues (pédicelles) dispersés sur les ter-minal partie de la tige. Nous devons maintenant examiner la fleur des parties le début avec le calice. Ce que nous pouvons voir, regardez-ing au dessous de certaines des fleurs, possède quatre sépales ressemblant à grande échelle, qui tombent facilement après l'ouverture d'e

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Elementary botany . ds, dies down. The leaves are situated a little above the middle point of thestem. They are opposite and the number is two, each onebeing divided into three dentate lobes, making what is called acompound leaf. 647. Parts of the flower.—The flowers are several, and theyare borne on quite long stalks (pedicels) scattered over the ter-minal portion of the stem. We should now examine the partsof the flower beginning with the calyx. This we can see, look-ing at the under side of some of the flowers, possesses four scale-like sepals, which easily fall away after the opening of the flower.They do not resemble leaves so much as the sepals of trillium, but they belong to the leaf series, and there are two pairs in theset of four. The corolla also possesses four petals, which are moreexpanded than the sepals and are whitish in color. The sta-mens are six in number, one pair lower than the others, and also ANGIOSPERMS: DENTARIA. 323 shorter. The filament is long in proportion to the anther, the. latter consisting of twolobes or sacs, instead offour as in trillium. Thepistil is composed of twocarpels, or leaves fusedtogether. So we find inthe case of the pepperroot that the parts of theflower are in twos, ormultiples of two. Thusthey agree in this respectwith the leaves; andwhile we do not seesuch a strong resem-blance between theparts of the flowerhere and the leaves, yet from the pres-ence of the pollen Fig 383.Toothwort (Dentaria diphylla). 324 MORPHOLOGY. (microspores) in the anther sacs (microsporangia) and of ovules(macrosporangia) on the margins of each half of the pistil, weare, from our previous studies, able to recognize here that all themembers of the flower belong to the leaf series. 648. In trillium and in the pepper root we have seen that theparts of the flower in each apparent whorl are either of the samenumber as the leaves in a whorl, or some multiple of that num-ber. This is true of a large number of other plants, but it is nottrue of all.

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