hadromen.

1898 H. C. Porter tr. E. Strasburger et al. Text-bk. Bot. 102 Other terms often used to designate the vascular bundles are folio-vascular bundles and mestome. The vascular portion is also termed the xylem or hadrome.

1914 M. Drummond tr. G. Haberlandt Physiol. Plant Anat. vii. 347 The water-conducting vessels and tracheides constitute..the resistant hadrome portion [of the conducting strand]... The xylem includes the hadrome with its associated wood-fibres... Where..no wood-fibres are developed, xylem is the exact equivalent of hadrome.

1965 K. Esau Plant Anat. (ed. 2) xii. 272 The parallel term for the xylem is hadrom, which refers to the conducting part of the xylem..excluding the fibers.

1900 B. D. Jackson Gloss. Bot. Terms 310/1 Hadrocentric, having the hadrome in the centre surrounded by the leptome.

1914 M. Drummond tr. G. Haberlandt Physiol. Plant Anat. vii. 349 If the hadrome is central and the leptome peripheral, the bundle may be termed hadrocentric.

1899 Jrnl. Chem. Soc. 76 i. 560 A substance termed hadromal has been isolated from different woody tissues; it has the properties of a phenol and of an aldehyde.

1928 Chem. Abstr. 22 399 Czapek's hadromal.., which he considers responsible for the characteristic red color given by wood tissues with phloroglucinol-HCl.

1952 F. E. Brauns Chem. Lignin iv. 37 Hadromal occurs in wood as a coniferyl aldehyde cellulose ester.

1900 B. D. Jackson Gloss. Bot. Terms (Addendum) Hadromase, an enzyme found in Merulius lacrymans, Schum., and other Fungi, which attacks the hadrome and destroys its lignified cell-walls (Czapek).

1909 J. R. Green Hist. Bot. 406 Czapek found in 1899 that the nutrition of certain fungi which attack lignified cell walls is materially aided by an enzyme, which he called hadromase, which dissolves the woody constituents.

1916 G. H. Pethybridge in Sci. Proc. Royal Dublin Soc. 15 87 The fungus mycelium is, at any rate in the early stages of the disease, confined to the wood vessels..and I, therefore, suggest the word ‘hadromycosis’ for use in this connexion.

1917 Nature 22 Feb. 500/2 Plants suffering from the choking of their vessels [by fungi] (hadromycosis).

1931 Hilgardia V. 197 (title) Verticillium hadromycosis.

1971 G. C. Ainsworth Ainsworth & Bisby's Dict. Fungi (ed. 6) 254 Hadromycosis, a disease of plants in which the pathogen is confined to the xylem, e.g. Verticillium wilt of potato and tomato.