Difference between revisions of "Adiantum jordanii"
Bot. Zeitung 1864: 26. 1864.
Common names: California maidenhair
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>short-creeping; scales reddish brown, concolored, margins entire. <b>Leaves</b> arching or pendent, clustered, 30–45 cm. <b>Petiole</b> 1–1.5 mm diam., glabrous, not glaucous. <b>Blade</b> lanceolate, pinnate, 20–24 × 8–10 cm, gradually reduced distally, glabrous; proximal pinnae 3(–4)-pinnate; rachis straight, glabrous, not glaucous. <b>Segment</b> stalks 1–4 mm, with dark color ending abruptly at segment base. <b>Ultimate</b> segments fan-shaped, not quite as long as broad; base truncate or broadly cuneate; margins of fertile segments unlobed but very narrowly incised, sterile segments with margins lobed, denticulate; apex rounded. <b>Indusia</b> transversely oblong, 3–10 mm, glabrous. <b>Spores</b> mostly 40–50 µm diam. <b>2n</b> = 60.</span><!-- |
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| + | |phenology=Sporulating early spring–midsummer. | ||
|habitat=Seasonally moist, shaded, rocky banks, canyons, and ravines | |habitat=Seasonally moist, shaded, rocky banks, canyons, and ravines | ||
|elevation=0–1000 m | |elevation=0–1000 m | ||
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|basionyms= | |basionyms= | ||
|family=Pteridaceae | |family=Pteridaceae | ||
| + | |phenology=Sporulating early spring–midsummer. | ||
|habitat=Seasonally moist, shaded, rocky banks, canyons, and ravines | |habitat=Seasonally moist, shaded, rocky banks, canyons, and ravines | ||
|elevation=0–1000 m | |elevation=0–1000 m | ||
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|publication year=1864 | |publication year=1864 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_522.xml |
|genus=Adiantum | |genus=Adiantum | ||
|species=Adiantum jordanii | |species=Adiantum jordanii | ||
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-->[[Category:Treatment]][[Category:Adiantum]] | -->[[Category:Treatment]][[Category:Adiantum]] | ||
Revision as of 14:22, 27 July 2019
Stems short-creeping; scales reddish brown, concolored, margins entire. Leaves arching or pendent, clustered, 30–45 cm. Petiole 1–1.5 mm diam., glabrous, not glaucous. Blade lanceolate, pinnate, 20–24 × 8–10 cm, gradually reduced distally, glabrous; proximal pinnae 3(–4)-pinnate; rachis straight, glabrous, not glaucous. Segment stalks 1–4 mm, with dark color ending abruptly at segment base. Ultimate segments fan-shaped, not quite as long as broad; base truncate or broadly cuneate; margins of fertile segments unlobed but very narrowly incised, sterile segments with margins lobed, denticulate; apex rounded. Indusia transversely oblong, 3–10 mm, glabrous. Spores mostly 40–50 µm diam. 2n = 60.
Phenology: Sporulating early spring–midsummer.
Habitat: Seasonally moist, shaded, rocky banks, canyons, and ravines
Elevation: 0–1000 m
Distribution
Calif., Oreg., Mexico in Baja California.
Discussion
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).
Selected References
None.
Lower Taxa
None.