1990 journal article
VARIATION PATTERNS AND RECOGNITION OF VARIETIES OF TILIA-AMERICANA SL
SYSTEMATIC BOTANY, 15(1), 33–48.
TL;DR:
The objectives were to survey the genus throughout North America, and review the characters discussed by earlier workers to describe and illustrate pollen morphology, foliar cuticular patterns, epicuticular wax, and trichome types using SEM.
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UN Sustainable Development Goal Categories
15. Life on Land
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
The objectives were to survey the genus throughout North America; review the characters discussed by earlier workers; describe and illustrate pollen morphology, foliar cuticular patterns, epicuticular wax, and trichome types using SEM; search for qualitative micromorphological characters and character states that might be useful in deriving a more realistic taxonomic treatment; and revise the taxonomy as appropriate