Abam - Acti
- Abama americana (Ker Gawl.) Morong
- Abama americana (Ker Gawl.) Morong
- Abama montana Small
- Abelia R. Br.
- Abelia ×grandiflora (Rovelli ex André) Rehder [chinensis × uniflora]
- Abelia ×grandiflora (Rovelli ex André) Rehder [chinensis × uniflora]
- Abelmoschus esculentus (L.) Moench
- Abelmoschus esculentus (L.) Moench
- Abelmoschus manihot (L.) Medik. [excluded]
- Abelmoschus manihot (L.) Medik. [excluded]
- Abelmoschus Medik.
- Abelmoschus moschatus Medik.
- Aberia caffra Hook. f. & Harv.
- Aberia gardneri D. Clos
- Abies alba Mill.
- Abies amabilis (Douglas ex Louden) Douglas ex Forbes
- Abies amabilis (Douglas ex Louden) Douglas ex Forbes
- Abies arizonica Merriam
- Abies balsamea (L.) Mill.
- Abies balsamea (L.) Mill.
- Abies balsamea (L.) Mill. ssp. lasiocarpa (Hook.) B. Boivin
- Abies balsamea (L.) Mill. ssp. lasiocarpa (Hook.) B. Boivin
- Abies balsamea (L.) Mill. ssp. lasiocarpa (Hook.) B. Boivin
- Abies balsamea (L.) Mill. ssp. lasiocarpa (Hook.) B. Boivin
- Abies balsamea (L.) Mill. var. balsamea
- Abies balsamea (L.) Mill. var. balsamea
- Abies balsamea (L.) Mill. var. fallax (Engelm.) B. Boivin
- Abies balsamea (L.) Mill. var. fallax (Engelm.) B. Boivin
- Abies balsamea (L.) Mill. var. fallax (Engelm.) B. Boivin
- Abies balsamea (L.) Mill. var. fallax (Engelm.) B. Boivin
- Abies balsamea (L.) Mill. var. phanerolepis Fernald
- Abies balsamea (L.) Mill. var. phanerolepis Fernald
- Abies bifolia A. Murray
- Abies bracteata (D. Don) D. Don ex Poit.
- Abies bracteata (D. Don) D. Don ex Poit.
- Abies concolor (Gord. & Glend.) Lindl. ex Hildebr.
- Abies concolor (Gord. & Glend.) Lindl. ex Hildebr.
- Abies concolor (Gord. & Glend.) Lindl. ex Hildebr. var. concolor
- Abies concolor (Gord. & Glend.) Lindl. ex Hildebr. var. concolor
- Abies concolor (Gord. & Glend.) Lindl. ex Hildebr. var. lowiana (Gord. & Glend.) Lemmon
