. Class-book of botany [microform] : being outlines of the structures, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. Diagrams of flowers (as seen by cross-sections). 253, Jeffersonia diphylla: o, ovary ; •, sta- mens ; i/, inner row of petals, aistlvation triquetrous; b, outer row of petals, (estivation contorteil; c, sepals, (estivation quincunoial. 254, Lily. 255, Strawberry. 256, Mustard. The pupil will designate the modes uf ffistivatioii. The aBstivation of the sepals often
. Class-book of botany [microform] : being outlines of the structures, physiology, and classification of plants : with a flora of the United States and Canada. Botany; Botany; Plants; Plants; Botanique; Botanique; Plantes; Botanique. Diagrams of flowers (as seen by cross-sections). 253, Jeffersonia diphylla: o, ovary ; •, sta- mens ; i/, inner row of petals, aistlvation triquetrous; b, outer row of petals, (estivation contorteil; c, sepals, (estivation quincunoial. 254, Lily. 255, Strawberry. 256, Mustard. The pupil will designate the modes uf ffistivatioii. The aBstivation of the sepals often differs from that of the petals in the same flower. Thus, in the pink the sepals are imbricated and the petals contorted. 395. The position on the parts op the flov/er, with respect to the main axis and the bract whence it arises, is often important in description. That part which is adjacent to the axis is the posterior or upper, while that which looks to- ward the bract is the anterior or lower part. THE FLORAL ORGANS. 396. Technical definition of the flower. The flower ia an as- semblage of leaves more delicately and variously formed, borne at the upper nodes of the axis where the internodes are undeveloped. This portion of the axis is called 397. The receptacle or torus. It is the axis of the flower situ- ated at the summit of the flower-stalk. Its form above is commonly that of a flattened or somewhat conical disk, the center of which cor- responds with the apex of the axis. 398. The flower may consist of the following members : 1, the jioral envelops ; 2, the essential floral organs. 399. The floral envelops consist of one or more circles or whorls of leaves surrounding the essential organs. The outer of these whorls is called the calt/x and the other, if there be any, the corolla. The calyx may, therefore, exist without the corolla, but the corolla can not exist without 400. The calyx. This is a Greek word signifying a cup. It is ap- plied to the external envelop of t
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
