. Key and flora : northern and central states . Botany. COMPOSITE FAMILY 239 100. COMPOSIT.^. Composite Family Flowers epigynous, in a dense head, on a common recepta- cle, surrounded by an involucre composed of many bracts (Fig. 29), â with usually 5 stamens inserted on the corolla, the anthers united into a tube which surrounds the Fig. 29. Flower cluster and flowers of yarrow A, flower cluster; B, section of flower cluster; C, a ray flower; D, a disk flower, a, anthers; ch, ohaflE of disk; d, disk flowers; o, ovary; re, corollas of ray flowers; s, stigmas; tc, corolla of tubular flo
. Key and flora : northern and central states . Botany. COMPOSITE FAMILY 239 100. COMPOSIT.^. Composite Family Flowers epigynous, in a dense head, on a common recepta- cle, surrounded by an involucre composed of many bracts (Fig. 29), â with usually 5 stamens inserted on the corolla, the anthers united into a tube which surrounds the Fig. 29. Flower cluster and flowers of yarrow A, flower cluster; B, section of flower cluster; C, a ray flower; D, a disk flower, a, anthers; ch, ohaflE of disk; d, disk flowers; o, ovary; re, corollas of ray flowers; s, stigmas; tc, corolla of tubular flower. (A, B, C, 1 times natural size; D, 18 times natural size) Calyx with its limb sometimes wanting; when present taking the! form of scales, bristles, etc., known as pappus (Fig. 30). Corolla either strap-shaped (Fig. 29, re) or tubular (Fig. 29, tc); in the former case often 5-toothed, in the latter usually 5- lobed. Style 2-cleft above. Fruit an akene, often provided with means of transportation. This is the largest family of flowering plants and among the most for insect. 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston : Ginn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1908
