单词 | monostelic |
释义 | monostelicadj. Botany. rare. Having a single or undivided stele. ΚΠ 1891 Jrnl. Royal Microsc. Soc. 224 M. P. Van Tieghem now regards the stem of all the genera of Ophioglossaceæ as monostelic in the tigellar portion..and astelic..in the portion of the stem above the first leaf. 1894 S. H. Vines Students' Text-bk. Bot. I. 153 When the stem is monostelic, each leaf receives a portion, termed a meristele, of the stele of the stem. 1903 Philos. Trans. (Royal Soc.) B. 195 129 Gleichenia is monostelic. 1995 Bot. Jrnl. Linn. Soc. 117 171 Two characters were identified as being taxonomically valuable: (1) the presence of sclerenchyma caps associated with leaf vascular bundles, and (2) the degree of dissection of the siphonostele of the tuber (‘polystelic’ or ‘monostelic’). This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022). < adj.1891 |
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