. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. LEGUMINOS^. 477 presence of one or other of these characters the order may be recog- nised. It is remarkable that one or other of these distinctions dis- appears in a great number of cases. Csesalpiniese have irregular flowers, with spreading petals and stamens adhering to the calyx;. Fig. 702. Fig. 704. others have no petals at all, or some number less than five; while Mimosese have perfectly regular flowers and indefinite hypogynous stamens. Detarium and other plants
. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. LEGUMINOS^. 477 presence of one or other of these characters the order may be recog- nised. It is remarkable that one or other of these distinctions dis- appears in a great number of cases. Csesalpiniese have irregular flowers, with spreading petals and stamens adhering to the calyx;. Fig. 702. Fig. 704. others have no petals at all, or some number less than five; while Mimosese have perfectly regular flowers and indefinite hypogynous stamens. Detarium and other plants of this family bear fruits not to be distinguished from a drupe. Leguminous plants and Roseworts have so many features in common that it may be affirmed that no positive character has been discovered to distinguish the one order from the other, except the inferior position of the odd calycine lobe. Figs. 700-704. Organs of fnictification of Lathyms odoratus, Sweat-pea, a papilionaceous flower, showing the structure of the natural order Leguminosae. Fig. 700. Diagram of the flower, showing five divisions of the calyx, 5 petals, consisting of 2 parts forming the carina, 2 alse, and the vexillum, which is superior, 10 stamens in 2 rows, diadelphous; ovary 1- celled, formed by a single carpel; one of the ovules shown with its funiculus attached to the ventral suture. - Fig. 701. Longitudinal section of the flower of Lathyrus odoratus. c c, Calyx, with five segments, e, Vexillum or standard, being the superior or posterior odd petal, a. One of the alse, or wings, c a, One-half of the carina, or keel, t, Tube of the stamens, the filaments being united in two bundles, or diadelphous. o, Ovary laid open, showing the ovules attached to the placenta, on the ventral or upper suture, s. Stigma, at the apex of the style, which is continuous with the ventral suture. Fig. 702. Fruit, a Legume or Pod, openiiig by two valves, and dehiscing by the ventral and dorsal suture. Seeds attached on ea
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1875
