bicollateraladj.
/ˌbʌɪkəˈlatərəl/ Botany.
Of a vascular bundle: having two masses of phloem on opposite sides of the xylem. (See collateral adj. 1e.)
ΘΚΠ
the world > plants > part of plant > cell or aggregate tissue > [adjective] > of or with a vascular bundle
indefinite1849
bicollateral1881
intrafascicular1900
1881 Encycl. Brit. XII. 18/1 In Cucurbita, Solanum, and others the bundles are ‘bicollateral’, there being an additional phloem portion inside the xylem.
1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 949 Bicollateral bundles, in which..there is a layer of phloëm on the inner as well as on the outer side of the xylem.
1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 319 A special subordinate form, to be called the double collateral or bicollateral, is distinguished from the usual one by the fact that two phloem groups lie on opposite sides of one xylem group.
1900 W. Wallace in Ann. Bot. Dec. 640 Most Cucurbitaceæ have bicollateral bundles.
1953 K. Esau Plant Anat. xv. 355 The presence of phloem on both sides of the xylem makes the bundle bicollateral.
Derivatives
ˌbicoˌllateˈrality n.
ΘΚΠ
the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > vascular bundle > condition of
bicollaterality1900
1900 W. Wallace in Ann. Bot. Dec. 641 Weiss adopts this conception of bicollaterality.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).
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adj.1881