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- Ulmus americana (category Ulmus)d'Amérique EndemicIllustrated Synonyms: Ulmus americana var. aspera Chapman Ulmus americana var. floridana (Chapman) Little Ulmus floridana Treatment appears in5 KB (496 words) - 22:46, 5 November 2020
- Ulmus alata (category Ulmus)Winged elm wahoo EndemicIllustrated Synonyms: Ulmus americana var. alata (Michaux) Spach Treatment appears in FNA Volume 3. Illustrator: John Myers Copyright:3 KB (301 words) - 22:46, 5 November 2020
- ponderosa changes from var. scopulorum in the north to var. arizonica in the south. In Arizona and New Mexico, Picea engelmanii and Abies bifolia "var. arizonica"133 KB (20,036 words) - 18:33, 13 February 2019