Glossary of Botanical Terms:
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triquetrous: triangular in cross-section and sharply angled; with three distinct longitudinal ridges. Fig. 10 G. cf. trigonous.
Fig. 10. Leaves and Margins in Cross Section. A, plano-convex; B, incurved; C, involute; D, recurved; E, revolute; F, trigonous; G, triquetrous; H, terete.
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