Bot. Zeitung1864: 26. 1864
Phenology: Sporulating early spring–midsummer.
Habitat: Seasonally moist, shaded, rocky banks, canyons, and ravines
Elevation: 0–1000 m
Adiantum jordanii occasionally hybridizes with A. aleuticum where their ranges overlap in northern California, yielding the sterile hybrid Adiantum × tracyi C. C. Hall ex W. H. Wagner. Adiantum × tracyi, morphologically intermediate between its parental species, can be distinguished from A. jordanii by its broadly deltate leaf blade that tapers abruptly from the 4(–5)-pinnate base to a 1-pinnate apex. It is best separated from A. aleuticum by leaf blades with a strong rachis, and by ultimate blade segments that are less than twice as long as broad. Adiantum × tracyi shows 59 univalents at metaphase; its spores are irregular and misshapen (W. H. Wagner Jr. 1962).
|Author||Cathy A. Paris +|
|Common name||California maidenhair +|
|Elevation||0–1000 m +|
|Habitat||Seasonally moist, shaded, rocky banks, canyons, and ravines +|
|Illustrator||John Myers +|
|Phenology||Sporulating early spring–midsummer. +|
|Taxon name||Adiantum jordanii +|
|Taxon parent||Adiantum +|
|Taxon rank||species +|
|Volume||Volume 2 +|