. Botany for agricultural students . Botany. plants are like those of the preceding families in character of the ovary and seeds but differ from them in having a perianth differentiated into a showy corolla and a large calyx {Fig. ). They are regarded as a transition group between the Apetalac and Poly- petalae. Among them are some garden favorites, such as the Carna- tions, Pinks, Sweet Williams, and Lychnis, and also some weeds of which the Chickweeds, Corn Cockle, Cow-herb, and Bouncing Bet are common ones. Polypetalae As previously stated the Poly- petalae have petals and the petals ar
. Botany for agricultural students . Botany. plants are like those of the preceding families in character of the ovary and seeds but differ from them in having a perianth differentiated into a showy corolla and a large calyx {Fig. ). They are regarded as a transition group between the Apetalac and Poly- petalae. Among them are some garden favorites, such as the Carna- tions, Pinks, Sweet Williams, and Lychnis, and also some weeds of which the Chickweeds, Corn Cockle, Cow-herb, and Bouncing Bet are common ones. Polypetalae As previously stated the Poly- petalae have petals and the petals are generally separate. The colored corolla is usually distinct from the green calyx, and the flowers are pol- linated chiefly by insects. Among the lower families of the Polypeta- lae, as the Buttercups (Ranunculaceae) illustrate, the flower usu- ally has numerous stamens and a. number of separate pistils. The calyx and corolla are also attached below the stamens and pistils or, in other words, the flowers are hypogynous. In passing to the more ad- vanced families of the Polypetalae, the number of stamens and carpels become more definite, and assume the cyclic ar- rangement. There is also a tendency for the carpels to join and a tendency of the flower toward epigyny in the higher families. Crowfoot or Buttercup Family (Ranun- culaceae) . — This family includes numer- ous species, mostly herbs, having in common separate petals, and separate sepals. The stamens and commonly the carpels Fig. 426. — A portion of a plant of Corn' Cockle (Agro- slemma Gilhago) (Xi). The flowers have a perianth consist- ing of a calyx and showy corolla. Modified from Fig. 427. — A fiower of a Buttercup, showing the many stamens and pistils. 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 Martin, John N. (John Natha
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
