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callose: Hard-leathery, callose tissue usually is also thicker than comparable adjacent tissue.[1]
The given value was not understood.
The given value was not understood.

Example(s): Example sentences from FNA : [1] leaf blade ovate, 3–5.5 × 2–4 cm, papery, 3-veined, both surfaces villous, base truncate or subtruncate, margin sparsely callose-denticulate, apex acuminate. [2] Petals yellow, lanceolate or narrowly oblong to ensiform, 4–11 1.3–3 mm, 2-callose, 3–5 (–7 )-veined, base with a claw 0.4–1.2 mm, apex obtuse to acute.


  1. Categorical Glossary for the Flora of North America Project, by Robert W. Kiger and Duncan M. Porter. 2001. Hunt Institute for Botanical Documentation.