. Class-book of botany : being outlines of the structure, physiology and classification of plants : with a flora of the United States and Canada. Botany; Botany; Botany. 90 THE PLAN OF THE FLOWER. 1. In the unequal size of like organs (petals of mullein). 2. In their dissimilar forms or positions (petals of the pea). 3. In the unequal cohesion of like parts (petals of Lobelia). 4. In unequal suppressions (stamens of the Labiate flowers, where, indeed, as in many other flowers, all these phases of irregularity are combined). 2S7 289 2S9. Flower (magnified) of Myosnrus; a vertical section
. Class-book of botany : being outlines of the structure, physiology and classification of plants : with a flora of the United States and Canada. Botany; Botany; Botany. 90 THE PLAN OF THE FLOWER. 1. In the unequal size of like organs (petals of mullein). 2. In their dissimilar forms or positions (petals of the pea). 3. In the unequal cohesion of like parts (petals of Lobelia). 4. In unequal suppressions (stamens of the Labiate flowers, where, indeed, as in many other flowers, all these phases of irregularity are combined). 2S7 289 2S9. Flower (magnified) of Myosnrus; a vertical section showing its elongated receptacle, etc 2S7, Tho same, natural size. 2S8, Flower of Isopyrum biternatum; vertical section, showing the convex or globular receptacle, etc. 289, Flower of rose, showing its excavated torus. 442. The regular receptacle has no internodes. It bears the several whorls of the flower in close contact with each other, and is usually short and depressed. 443. Lengthened receptacle. "When these whorls are numerous, as in buttercups, tulip-tree, the receptacle is necessarily elongated. So in Myosurus, blackberry, strawberry. In the two latter it imbibes the nutritious juices of the plant and becomes a part of the fruit. 444. Excavated recepta- cle. On the contrary, the to- rus instead of lengthening may be hollowed out in the center. The carpels of the rose are sit- uated in such a cavity, while the other organs are borne upou its elevated rim. In Nelnmbium the carpels are immersed in as many separate excavations in a large, fleshy receptacle. 445. But the ikterxodes op the torus are sometimes developed, e. g., in noble liverwort a short inter- nodo between the corolla and calyx. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wood, Alphonso, 1810-1881. New York : A. S. Barnes & B
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectbotany, bookyear1861
