. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. k< '" 22 "â / n te ELKMENTS OF STllUOTUHAri MOTANY. CHAPrKR JV. s - EXAMINATION OF OTlIKli COMMON PLANTS WITH IIYP/^GY NOUS STAMENS SIIEIMIEUD's 1»UKSEâUOUND- liEAVED MALLOW. 28. Wo shall now proceed to examine some plants, the ilowers of which exhibit, in their structure, impor- tant variations from the I-Jutteicup, Hepatica, and Alarsh-Marigold. Shepherd's Purse. This plant (Fig.
. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. k< '" 22 "â / n te ELKMENTS OF STllUOTUHAri MOTANY. CHAPrKR JV. s - EXAMINATION OF OTlIKli COMMON PLANTS WITH IIYP/^GY NOUS STAMENS SIIEIMIEUD's 1»UKSEâUOUND- liEAVED MALLOW. 28. Wo shall now proceed to examine some plants, the ilowers of which exhibit, in their structure, impor- tant variations from the I-Jutteicup, Hepatica, and Alarsh-Marigold. Shepherd's Purse. This plant (Fig. 20) is one of the commonest of weeds. As in the Buttonup, the foliage-leaves are of two kinds, radical and cauiine, the former being in a cluster around the base of the stem. The cauiine leaves are all sessile, and each of them, at its base, projects backward on each side of the stem, so that the leaf somewhat resembles the head cf an arrow. Such leaves are, in fact, said to be fiaf/iffatc, or arrow- shaped. The Ilowers grow in a cluster at the top of the stem, and, as the season advances, the peduncle gradu- ally elongates, until, at the close of the summer, it forms perhaps half of the entire length of the stem. You will observe in this plant, that each separate flower is raised on a little stalk of its own. Each of these little stalks is a fmiicel, and when pedicels are present, the term peduncle is applied to the por- tion of stem which supports the whole cluster. 29. The flowers (Fig. 27) are rather small, and so will require more than ordinary care in their examination. Tiie calyx is polysepalous, and of Figf. of Shepherd's Purse, EO. 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 Spotton, H. B. (Henry Byron), 1844-1933. Toronto : W. J. Gage
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Keywords: ., book, bookcentury1800, booksubjectbotany, booksubjectplantanatomy
