. The families of flowering plants. Plants; Phanerogams. 30 FAMILIES OF FLOWERING PLANTS. both the infloresence consists of spikes or panicles, made up of small spikelets; but the flower-bearing scale in a sedge is single, while in a grass it is double. Moreover the sedges often exhibit some traces of a floral envelope in the shape of a crown of bristles, while the grasses are quite destitute of perianth. The sedge leaves are sometimes flat and grass like, sometimes slender and wiry, or ' 'terete,'' as they are tech- nically called. The little thong- shaped appendage called a, ligule, borne at
. The families of flowering plants. Plants; Phanerogams. 30 FAMILIES OF FLOWERING PLANTS. both the infloresence consists of spikes or panicles, made up of small spikelets; but the flower-bearing scale in a sedge is single, while in a grass it is double. Moreover the sedges often exhibit some traces of a floral envelope in the shape of a crown of bristles, while the grasses are quite destitute of perianth. The sedge leaves are sometimes flat and grass like, sometimes slender and wiry, or ' 'terete,'' as they are tech- nically called. The little thong- shaped appendage called a, ligule, borne at the junction of leaf and stem in grasses, is entirely wanting in the sedges; and finally, the latter family have stems that are solid and more or less three-angled. Figure 28 illustrates a species of Oyperus common in the eastern United States, and will afford a good idea of the general plan of structure in the group. Figures 29 and 30 repre- sent types of the two large genera Scirpus and Gar Fig. 39.—Dark green Bulrush (Scirpus atrovirens). After Britton and Brourn, 111. Fl. Northern U. 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 Pollard, Charles Louis, 1872-. Washington, D. C. , The Plant World Co
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1900
