. The classification of flowering plants. Plants. AMARYLLIDACEAE 305 been shewn that the fleshy envelope is a large development of endosperm, on the outside of which the remains of the nucellus may form a thin membrane; there is no true testa, as the ovules are naked. The methods of germination are similar to those found in Liliaceae. In Leucojum, Galanthiis, Clivia and others the radicle at first grows quickly downwards, attaching the plant by means of numerous short root-hairs; the hypocotyl is almost. Fig. 147. Criniim longifolium. 1. Seed germinating; a, seed; r. radicle: c, cotyledon; b.
. The classification of flowering plants. Plants. AMARYLLIDACEAE 305 been shewn that the fleshy envelope is a large development of endosperm, on the outside of which the remains of the nucellus may form a thin membrane; there is no true testa, as the ovules are naked. The methods of germination are similar to those found in Liliaceae. In Leucojum, Galanthiis, Clivia and others the radicle at first grows quickly downwards, attaching the plant by means of numerous short root-hairs; the hypocotyl is almost. Fig. 147. Criniim longifolium. 1. Seed germinating; a, seed; r. radicle: c, cotyledon; b. first leaf ; sh. base of sheath of cotyledon which is already thickening to form the outermost bulb-scale, inside sh is the plumule. 2. Sucker, formed at the tip of the cotyledon by which the nourishment in the endosperm is absorbed for the use of the seedling. 3. Section of germinating seed shewing the sucker, s, of the cotyledon, c. lying in the endosperm. From a drawing by R. A. Salisbury, in the Department of Botany, British Museum. undeveloped throughout. The end of the cotyledon remains in the seed to absorb the endosperm, while the lower sheathing portion elongates, carrying out the plumule, the first leaf of which forms the first green leaf of the plant and gi'ows erect as a long, narrow, wedge-like sheath bearing a shorter green leaf-apex. After a time the radicle ceases to grow and the first adventitious root breaks through at the base of the coty- ledon. The sheathing portion of the cotyledon remains short in the above-mentioned genera, but in others, species of R. 20. 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 Rendle, A. B. (Alfred Barton), 1865-1938. Cambridge, University press
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
