. Aspects of plant life; with special reference to the British flora. Plants. 86 PLANTS AND ANIMALS the Orchids belong, sepals and petals usually combine in form and colour to form one corolla-like envelope (then called a perianth). In many other plant groups —for instance, the Dipsacaceco (such as the Scabious), UmbellifercB, and Composites—conspicuousness is obtained hy a grouping together of a large number of small flowers. In the Cow Parsnep (Heracleum Sphondylium) the outer petal of the marginal flowers. Fig. 15.—Umbel of Astrantia carniolica, showing petal- like RING OF COLOURED LEAVES (
. Aspects of plant life; with special reference to the British flora. Plants. 86 PLANTS AND ANIMALS the Orchids belong, sepals and petals usually combine in form and colour to form one corolla-like envelope (then called a perianth). In many other plant groups —for instance, the Dipsacaceco (such as the Scabious), UmbellifercB, and Composites—conspicuousness is obtained hy a grouping together of a large number of small flowers. In the Cow Parsnep (Heracleum Sphondylium) the outer petal of the marginal flowers. Fig. 15.—Umbel of Astrantia carniolica, showing petal- like RING OF COLOURED LEAVES (bRACTS). \. of the large umbel is much enlarged, which enhances this effect. In Astrantia, an interesting genus of Umbelliferce, the bracts take on the appearance of a ring of large petals, and surround the group of small flowers (Fig. 15). The same thing may be noticed in the outer blossoms of the close flower-head of the Field Scabious (Knautia arvensis). In many Com- positcB the process is carried still farther; in the Com-. 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 Praeger, R. Lloyd (Robert Lloyd), 1865-1953. London, Society for Promoting Christian Knowledge
Size: 2056px × 1215px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectplants, bookyear1921
