2024 Edition • Donate • Get the App • Cite this Page
X

Colors

Data mode

Account

Login
Sign up

Support FSUS...

We've finished our 2024 fundraiser. Many thanks to those who have given! It's not too late to support us (click here)...

Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Abies

Copy permalink to share

1 Cones 3.5-8 cm long; [native, also planted]; [section Balsameae].
  2 Bracts of the mature cones shorter than the scales or slightly exserted beyond the scales; stomatal rows (4-) 7 (-8) on each side of the midvein on the lower leaf surface (visible at 10× or greater magnification); [plant of the Central Appalachians and north, native from Page and Madison counties, wc. VA, northward]
  2 Bracts of the mature cones longer than the scales and reflexed; stomatal rows (8-) 10 (-12) on each side of the midvein on the lower leaf surface (visible at 10× or greater magnification); [plant of the Southern Appalachians, native from Grayson and Smyth counties, sw. VA, southward]
1 Cones 10-15 cm long; [exotic, persistent from horticultural use and sparingly naturalized].
    3 Juvenile-form leaves of young plants with rounded-retuse apices; leaf resin canals 2, marginal; cone bracts exserted and reflexed with elongate apical cusps; [section Abies]
    3 Juvenile-form leaves of young plants with spinose-bifid apices; leaf resin canals 2, median (and usually with up to 2 additional marginal canals); cone bracts exserted and erect with abrupt, short apical cusps; [section Pseudopicea]