Key to Athyrium

View taxon page for Athyrium

(For a list of species in Athyrium, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Sori generally round, ± near margin; indusia 0, marginal 

tooth 

1. A small, pointed projection, such as on the margin of a leaf, sepal, or petal. 2. The free tips of otherwise fused structures, such as sepals or petals (somewhat archaic usage); smaller than lobes.

often 

reflexed 

Abruptly bent or curved downward or backward.

over 

sorus 

In many ferns, a distinct cluster of sporangia.

..... A. distentifolium var. americanum

1' Sori 

oblong 

Longer than wide, with nearly parallel sides; wider than linear.

or J-shaped, ± not near margin; indusia oblong, J-shaped, or 

reniform 

Kidney-shaped; often pertaining to a leaf in which the blade base on both sides of the petiole is rounded and concave.

, margin ± reflexed or not, but not over sorus ..... A. filix-femina var. cyclosorum

Please use this Google Form for Contact/Feedback

Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.