. The classification of flowering plants. Plants. 352 FLOWERING PLANTS if the temperature is sufficiently high. In species of Mimosa (as M. pudica, Sensitive-plant) (fig. 173) the leaves assume a sleep-position in response to a touch. The seat of the movement in these cases is the pulvinus or swollen base of the leaf-stalk or petiolule. Extrafloral nectaries are found on the stipules or leaf- stalks of many members of the family; Vicia sepium is an example from our own flora. The origin of the periderm shews great variety. It seldom arises in the epidermis (Cytisus), more frequently in the sub
. The classification of flowering plants. Plants. 352 FLOWERING PLANTS if the temperature is sufficiently high. In species of Mimosa (as M. pudica, Sensitive-plant) (fig. 173) the leaves assume a sleep-position in response to a touch. The seat of the movement in these cases is the pulvinus or swollen base of the leaf-stalk or petiolule. Extrafloral nectaries are found on the stipules or leaf- stalks of many members of the family; Vicia sepium is an example from our own flora. The origin of the periderm shews great variety. It seldom arises in the epidermis (Cytisus), more frequently in the subepidermal. Fig. 173. Mimosa pudica shewing leaves expanded and closed, flower-head in bud and open, and pods in various stages of dehiscence; the thickened borders of the pod separate and the pod breaks up into one-seeded joints; reduced. (From Flor. Jam.) layer (Hymenaea, Bauhinia) or from a deeper layer of the cortex {Gleditschia, Rohinia) or finally from the pericycle (as in Ulex). According to Moeller, the three subfamilies may be distinguished by the structure of the sieve-tubes. In Papilionatae the individual members are short, only a little wider than the parenchyma-cells, and have simple transverse plates. In Caesalpinioideae they are much shorter, very much wider than the parenchyma-cells, and have several coarsely fitted plates on the moderately inclined ends; often, too, they are connected laterally with adjoining 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 Rendle, A. B. (Alfred Barton), 1865-1938. Cambridge, University press
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
