. The principles of botany, as exemplified in the phanerogamia. Botany; Botany; Phanerogams; 1854. 120 COMPOUND ORGANS OF PLANTS. together on its flat or convex surface. What are called com- pound flowers, as the Helianthemum, Aster and Dandelion, are heads of this nature, surrounded by a common involucre of bracts. This flat, dilated receptacle, is very conspicuous in the Dande- lion after its ripe pericarps have been removed by the wind. If the spike be succulent and covered with unisexual flowers, ordinarily incomplete, that is to say, without floral envelopes, and if the whole be enclosed
. The principles of botany, as exemplified in the phanerogamia. Botany; Botany; Phanerogams; 1854. 120 COMPOUND ORGANS OF PLANTS. together on its flat or convex surface. What are called com- pound flowers, as the Helianthemum, Aster and Dandelion, are heads of this nature, surrounded by a common involucre of bracts. This flat, dilated receptacle, is very conspicuous in the Dande- lion after its ripe pericarps have been removed by the wind. If the spike be succulent and covered with unisexual flowers, ordinarily incomplete, that is to say, without floral envelopes, and if the whole be enclosed in a spathe, the inflorescence is called a spadix, as in Arum maculatum, (Fig. 24.) If the spike be covered with unisexual flowers, male or female, borne in the axils of bracts, the axis of the spike being articulated at its base so that it is detached and falls off all in one piece, the inflorescence is termed an amentum or catkin, (Fig. 25.) Fig. 24. Fig. Fig. 25. a Unisexual amGntum of the hornbeam (Carpinus hetuliis.) b. One of the flowers with its subteoding bract 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 Coultas, Harland, d. 1877. Philadelphia : King & Baird
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectbotany, bookyear1854
