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Example(s): Example sentences from FNA :  Achene brown-gray, oblong, slightly compressed, ca. 0.6 mm, U-shaped elevated appendix along distal dorsiventral edge, verrucose.  Achene brownish gray, ellipsoid-ovoid, 0.8–1 mm, U-shaped elevated appendix along dorsiventral edge, verrucose.
- Categorical Glossary for the Flora of North America Project, by Robert W. Kiger and Duncan M. Porter. 2001. Hunt Institute for Botanical Documentation.