. Agricultural botany, theoretical and practical. Botany, Economic; Botany. 448 UMBELLIFER^ pound umbel: the bracts of the involucre extend as far as or beyond the flowers, and are pinnatifid, the segments very narrow and acuminate. The umbellules have involucels of narrow, or pinnatifid bracteoles. After flowering the outermost main branches of the compound umbel curve inwards, and the whole inflorescence then forms a hollow cup or nest-like structure. The flowers (i. Fig. 137) are epigynous : the calyx superior, con- sisting of five short tooth-like sepals : the corolla is composed of five w
. Agricultural botany, theoretical and practical. Botany, Economic; Botany. 448 UMBELLIFER^ pound umbel: the bracts of the involucre extend as far as or beyond the flowers, and are pinnatifid, the segments very narrow and acuminate. The umbellules have involucels of narrow, or pinnatifid bracteoles. After flowering the outermost main branches of the compound umbel curve inwards, and the whole inflorescence then forms a hollow cup or nest-like structure. The flowers (i. Fig. 137) are epigynous : the calyx superior, con- sisting of five short tooth-like sepals : the corolla is composed of five white incurved petals alternating with the sepals (the petals of the central flower of the umbel are often pink or reddish); the. Fig. 137.âI. Flower of Carrot (Daucus Carota L.). c Minute sepal of calyx ;/S petal; o ovary;_ st withered stamen ; d stylopodium ; j style and stigma. 2. Fruit of Carrot. The ovary is covered with long spines and hairs. </Stylopodium â 5 style and stigma. 3. Transverse section (magnified) of ovary through Vmc A,B,d (2). / Primary ridges ; s secondary ridges ; v vittje ; v6 vascular bundles ; e»t embyro of seed. andrcecium possesses five stamens, which set free their pollen and fall away soon after the flower opens; the gynaecium is inferior and syncarpous, consisting of two united carpels; the upper part of the ovary has a white fleshy stylopodium which bears two curved stigmas. The four secondary ridges on each carpel are more prominent than the primary ones, and bear ten or twelve long spinous pro- jections, on the end of which are three or four slightly hooked. 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 Percival, John, 1863-1949. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
