. The essentials of botany. Botany. CUP FLOWERS 313 and the five-petaled corolla, tubular below, but open and flat above. The five stamens are borne on the inside of the tubular part of the corolla, and their anthers are united around the style, as in the Sunflower. The ovule also is quite like that in the Sunflower. On ripening the upper part of the cup becomes prolonged into a slender beak far beyond the ovary carrying the spreading j,^^ calyx whorl upon its summit, and forming a veritable parachute which readily carries away the achene and its seed in even the lightest of br
. The essentials of botany. Botany. CUP FLOWERS 313 and the five-petaled corolla, tubular below, but open and flat above. The five stamens are borne on the inside of the tubular part of the corolla, and their anthers are united around the style, as in the Sunflower. The ovule also is quite like that in the Sunflower. On ripening the upper part of the cup becomes prolonged into a slender beak far beyond the ovary carrying the spreading j,^^ calyx whorl upon its summit, and forming a veritable parachute which readily carries away the achene and its seed in even the lightest of breezes. 577. Here it may be remarked that the Dandelion shows the highest development of flower structure found in the Anthophyta, and so it may be considered as the highest plant in the Vegetable Kingdom. Laboratory Studies, (a) With longitudinal sections of the flowers of Spiraea make out especially the thickened cup (torus), the smaller number of several-seeded carpels (five), and the many stamens. (6) Examine externally and in longitudinal section flowers and "apples" of any rose (Rosa). Note the great number of one-seeded carpels (resembling those of Strawberry), and sta- mens, and the deeply hollowed out, fleshy, receptacular cup, comparing with Spiraea. (c) Making comparisons with the Rose examine in a similar way the flowers and fruit of the Apple (Malus), or Pear (Pirus), Quince (Cydonia) or Hawthorn (Crataegus), noting especially the great thickening of the torus and its adherence to the five united carpels. (d) Make vertical sections of Plum flowers (Primus) so as to show the single free pistil (of one carpel) at the bottom of the cup, and the many stamens on its margin. Make cross-sections of growing plums (fruits) showing stony endocarp, and fleshy. 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 origi
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectbotany
