First steps to botany / By James L. Drummond.

Drummond, James L. (James Lawson), 1783-1853.

Date:: 1823

Catalogue details

Licence: Public Domain Mark

Credit: First steps to botany / By James L. Drummond. Source: Wellcome Collection.

26/410 (page 12)

which are exposed to the air become covered with foliage.* 4. Radix Jibrosa, a fibrous root. This is found in most annual plants, and in most grasses. It consists entirely of fibres or threads, the ultimate divisions of which are named fibrillae or fibrils. The fibres are frequently much branched; and in grasses which grow in loose sand are generally clothed thickly with down. Sometimes they are filiform or like threads, and in the palms and succulent plants of hot climates, they resemble cords, spreading far and wide under the surface of the soil, and have been named funiliform, or cord- like roots. 1 Fig. 4. a b c a, Fibrous root of a grass. b, Ditto downy, from growing in loose sand. c, Filiform root of duckweed. * “ On the morning of the 28th, I saw a tamarisk of an enormous size planted on the bank of the Nile: it had been loosened at the roots by progressive inundations, and at last overthrown; the greater number of its roots had ranged themselves upright, and produced leaves; the old branches on which the tree had fallen were fixed in the earth, and served as a footstool, so that the enormous trunk, which remained suspended horizontally, by a confusion in the sys-