. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. THE FLOWER 113. 158. The top-sli;xped reuep- tacle of NeluiiilK>, the Water Chiiiqiie- pin, ripening into a rii'Ml fur the (lisseiui- ualion ttt" the seeds. which all the organs of each kind are separate from one anotlier; and each set comprises a small number, ;is three or five. In such a case ^ it is the rule to find the organs in whorls,^ and the whorls arranged so that the organs of one whorl stan
. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. THE FLOWER 113. 158. The top-sli;xped reuep- tacle of NeluiiilK>, the Water Chiiiqiie- pin, ripening into a rii'Ml fur the (lisseiui- ualion ttt" the seeds. which all the organs of each kind are separate from one anotlier; and each set comprises a small number, ;is three or five. In such a case ^ it is the rule to find the organs in whorls,^ and the whorls arranged so that the organs of one whorl stand above the spaces of the whorl below, just as is the case with whorled foliage leaves. The petals thus stand over the s[iaces l)etween the sepals, the first row of stamens alternates with the petals, the second row of stanieus (if present) with the first, and the pistils alternate with the stamens. When the various members of the flower are more numerous and the receptacle somewhat elon- gated, as in the Magnolia, the ptirts are spirally placed. In short, the organs of the flower are arranged like leaves. 218. Morphology of the floral parts. — Sepals and petals are evident leaves, as they arc commonly and properly called. There are numerous cases where green forms, func- tioning as foliage, pass over by easy gradations to the white or bright-colored forms subserving the purposes of the flower. In shape, in fun- damental structure (in pos- sessing veins, etc.), and in arrangement on the axis, the parts of the perianth show nature of sepals, petals, and the morphology of leaves. ^^*""'"''' Stamens and pistils, also, agree with leaves in the order of insertion on the axis, as well 1 Soinetiines called a pattrrn flower. - \ whorl is a circular group of several organs .standing at the same level OIL the axis. OUT. OF BOX. 8. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and ap
Size: 1566px × 1595px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
