dictyostelen.

Brit.

/ˈdɪktɪəstiːl/, U.S.

/ˈdɪktiəˌstil/

Origin: Formed within English, by compounding. Etymons: dictyo- comb. form, stele n.

Etymology: < dictyo- comb. form + stele n.

Botany.

A type of stele (stele n. 2) found in certain vascular plants (esp. ferns) which is broken up into a network of meristeles separated by parenchymatous areas usually associated with leaf-gaps.

ΚΠ

1902 G. Brebner in Ann. Bot. 16 521 Dictyostele, a vascular tube with large overlapping leaf gaps, so that the whole structure becomes a network of vascular strands.

1938 H. E. Hayward Struct. Econ. Plants 58 In most herbaceous dicotyledonous stems the vascular system constitutes a dictyostele, or dissected siphonostele.

1960 K. Esau Anat. Seed Plants xvi. 217 In other ferns the leaf gaps are vertically elongate and overlap in the internodes so that the vascular cylinder appears dissected into strands, each with the phloem surrounding the xylem... Such a modification is called a dictyostele.

2001 Amer. Jrnl. Bot. 88 785 The combination of a simple dictyostele with amphicribral cauline meristeles..is characteristic of a wide range of highly derived filicalean ferns.

Derivatives

dictyoˈstelic adj.

ΚΠ

1903 New Phytologist 2 108 The young sporophyte of a fern..the mature stem of which is dictyostelic, that is to say its vascular tissue forms a tubular network of concentric vascular strands.

1988 Amer. Fern Jrnl. 78 87 Leaf positions are close together and the arrangement of leaf gaps approaches the dictyostelic condition.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).

单词	dictyostele
释义	dictyostelen. Brit. /ˈdɪktɪəstiːl/, U.S. /ˈdɪktiəˌstil/ Origin: Formed within English, by compounding. Etymons: dictyo- comb. form, stele n. Etymology: < dictyo- comb. form + stele n. Botany. A type of stele (stele n. 2) found in certain vascular plants (esp. ferns) which is broken up into a network of meristeles separated by parenchymatous areas usually associated with leaf-gaps. ΚΠ 1902 G. Brebner in Ann. Bot. 16 521 Dictyostele, a vascular tube with large overlapping leaf gaps, so that the whole structure becomes a network of vascular strands. 1938 H. E. Hayward Struct. Econ. Plants 58 In most herbaceous dicotyledonous stems the vascular system constitutes a dictyostele, or dissected siphonostele. 1960 K. Esau Anat. Seed Plants xvi. 217 In other ferns the leaf gaps are vertically elongate and overlap in the internodes so that the vascular cylinder appears dissected into strands, each with the phloem surrounding the xylem... Such a modification is called a dictyostele. 2001 Amer. Jrnl. Bot. 88 785 The combination of a simple dictyostele with amphicribral cauline meristeles..is characteristic of a wide range of highly derived filicalean ferns. Derivatives dictyoˈstelic adj. ΚΠ 1903 New Phytologist 2 108 The young sporophyte of a fern..the mature stem of which is dictyostelic, that is to say its vascular tissue forms a tubular network of concentric vascular strands. 1988 Amer. Fern Jrnl. 78 87 Leaf positions are close together and the arrangement of leaf gaps approaches the dictyostelic condition. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022). < n.1902
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