Botany of the United States North of Virginia: Comprising Descriptions of the Flowering and Fern-like Plants Hitherto Found in Those States

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Harper & brothers, 1848 - Botany - 480 pages
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Page xxvi - The leafets or divisions of a pinnate leaf. Pinnate. A leaf is pinnate when the leafets are arranged in two rows on the side of a common petiole; as in the Ash, Elder, and Rose.
Page xiii - Crucifers ; or of a fleshy mass, as in Lamium. 88. The disk sometimes appears to be a mere cellular expansion or the torus, (83) as in Nelumbium. 89. It is one of the parts commonly called nectary. 90. The whorl of organs immediately within the petals is composed of bodies called stamens, and they are essential to the production of seed. 91. When stamens and pistils occur in the same flower It is termed perfect or hemaphrodite ; but when the stamens are in one flower and the pistils in another, the...
Page xv - It is through this foramen that the molecules of the pollen are introduced into the nucleus ; and its position indicates the future position of the radicle of the embryo, the radicle being always next the foramen. 129. When the apex of the nucleus is contiguous to the base of the ovule, a connection takes place between the base of the ovule and the base of the nucleus, by a bundle of vessels called a raphe. 130. Fecundation having taken place, the floral envelopes usually fade away, the stamens disappear...
Page 16 - Sepals 3-4-6, deciduous, in a double row, surrounded externally by petaloid scales. Petals hypogynous, either equal to the sepals in number, and opposite to them, or twice as many, generally with an appendage at the base in the inside. Stamens equal in number to the petals, and opposite to them ; anthers generally with two separate cells, opening elastically with a valve from the bottom to the top.
Page 314 - Calyx membranous, lobed, persistent. Stamens definite, distinct, inserted into the base of the calyx, and opposite its lobes ; anthers curved inwards in aestivation, turned backwards with elasticity when bursting.
Page 466 - Thecse sessile, arranged in 2-ranked spikelets issuing from the margin of the frond, opening on the inner side from the base to the summit ; indusium a scale-like veil covering each theca.
Page xxxii - DIADELPHIA, filaments formtng 2 sets. *18. POLYADELPHIA, filaments forming more than 2 sets. Orders depend upon the number of stamens, and have the same names as the first 13 classes. **** Anthers united. 19.
Page xvii - The orange is a berry having a pericarp, separable into an epicarp, an endocarp and a sarcocarp, and the cells filled with pulpy bags, which are cellular extensions of the sides of the cavity.
Page xiii - If they are united both with the surface of the calyx and of the ovary, they are epigynous ; Ex.
Page xiv - Every placenta is therefore composed of two parts, one of which belongs to one margin of the carpel, and one to the other.

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