| 释义 |
indumentum Bot.|ɪndjʊˈmɛntəm|
Pl. -ta.
[a. L. indumentum; see indument.]
The covering of hairs on part of a plant, esp. when dense, e.g. the covering of the lower surface of the leaves of many species of rhododendron. Cf. indument 2.
1847J. Lindley Elem. Bot. (ed. 5) p. xlix, Indumentum: The hairy covering of plants, of whatever kind. 1858A. Gray Introd. Struct. & Syst. Bot. (ed. 5) 537/1 Indumentum: any hairiness or downy covering. 1930J. B. Stevenson Species of Rhododendron 364 Under surface [of leaves of R. eriogynum] at first clad with a thin white flaking stellate indumentum easily rubbed off and quickly falling away. 1950J. M. Cowan Rhododendron Leaf i. 1 On looking at the leaves of Rhododendrons, it will be seen that the under surface is often clothed with a hairy or scale-like covering, now loose and of a fine texture like a spider's web, now dense and compact like a thick felt or wool, now a mere sprinkling of brownish dots on a green background. This leaf covering, which is very variable, is known as the indumentum. 1963Davis & Heywood Princ. Angiosperm Taxon. v. 155 To be of use for critical discrimination, indumentum must, of course, be described in detail, each type of hair present (and its disposition) being separately recorded. 1970Watsonia VIII. 104 H[ieracium] termifrons occurs in two well-marked forms differing in shape of head and indumentum of the phyllaries. 1972Biol. Abstr. LIV. 68/1 X[imenia] caffra differs from X. americana in that a dense or sparse indumentum is often present. |