Nature and development of plants . Fig. 329. Fig. 330. FlG. 329. Flower of the morning-glory (Ipomoca), showing the tubularcorolla characteristic of the Polemoniales. Fig. 330. Boraginaceae: C, inflorescence of comfrey {Symphytum).Note the coiled inflorescence, a, a feature of this family. D, section offlower, showing the deeply four-lobed ovary and the stamens cohering highOil tlie corolla and alternating with small tongue-like scales. the stamens are reduced to a single whorl, and frequently lessthan five in number. The pistils cohere completely and areusually composed of but two carpels. Th
Nature and development of plants . Fig. 329. Fig. 330. FlG. 329. Flower of the morning-glory (Ipomoca), showing the tubularcorolla characteristic of the Polemoniales. Fig. 330. Boraginaceae: C, inflorescence of comfrey {Symphytum).Note the coiled inflorescence, a, a feature of this family. D, section offlower, showing the deeply four-lobed ovary and the stamens cohering highOil tlie corolla and alternating with small tongue-like scales. the stamens are reduced to a single whorl, and frequently lessthan five in number. The pistils cohere completely and areusually composed of but two carpels. This reduction is asso-ciated with a pronounced irregularity of the corolla in the higherfamilies and a high degree of specialization in the constructionof the flower which accounts for the occurrence of the largenumber of individuals. The order is noted for its great number DEVELOPMENT OF PLANTS 443 of showy flowers and the large tubular corollas which attain theirhighest perfection in several of the families. (a) The More Importan
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