Difference between revisions of "Adiantum aleuticum"
Rhodora 93: 112. 1991.
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|common_names=Western maidenhair;Aleutian maidenhair;adiante des aléoutiennes | |common_names=Western maidenhair;Aleutian maidenhair;adiante des aléoutiennes | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
| + | }} | ||
|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Adiantum pedatum var. aleuticum | |name=Adiantum pedatum var. aleuticum | ||
| Line 49: | Line 53: | ||
|habitat=Wooded ravines, shaded banks, talus slopes, serpentine barrens, and coastal headlands (uncommon) | |habitat=Wooded ravines, shaded banks, talus slopes, serpentine barrens, and coastal headlands (uncommon) | ||
|elevation=0–3200 m | |elevation=0–3200 m | ||
| − | |distribution=Alta.;B.C.;Nfld.;Que.;Alaska;Ariz.;Calif.;Colo.;Idaho;Maine;Md.;Mont.;Nev.;Oreg.;Pa.;Utah;Vt.;Wash.;Wyo.;Mexico in Chihuahua. | + | |distribution=Alta.;B.C.;Nfld. and Labr. (Nfld.);Que.;Alaska;Ariz.;Calif.;Colo.;Idaho;Maine;Md.;Mont.;Nev.;Oreg.;Pa.;Utah;Vt.;Wash.;Wyo.;Mexico in Chihuahua. |
|discussion=<p><i>Adiantum aleuticum</i> is disjunct in wet rock fissures at high elevations in Arizona, Colorado, Montana, <i>Nevada</i>, Utah, Wyoming, and Mexico in Chihuahua, and it is disjunct on serpentine in Newfoundland, Quebec, Maine, Maryland, Pennsylvania, and Vermont.</p><!-- | |discussion=<p><i>Adiantum aleuticum</i> is disjunct in wet rock fissures at high elevations in Arizona, Colorado, Montana, <i>Nevada</i>, Utah, Wyoming, and Mexico in Chihuahua, and it is disjunct on serpentine in Newfoundland, Quebec, Maine, Maryland, Pennsylvania, and Vermont.</p><!-- | ||
--><p>Although the western maidenhair has traditionally been interpreted as an infraspecific variant of <i>Adiantum pedatum</i>, the two taxa are reproductively isolated and differ in an array of morphologic characteristics. Therefore, they are more appropriately considered separate species (C. A. Paris and M. D. Windham 1988). Morphologic differences between <i>A. pedatum</i> and <i>A. aleuticum</i> are subtle; the two may be separated, however, using characteristics in the key. <i>Adiantum aleuticum</i> occurs in a variety of habitats throughout its range, from moist, wooded ravines to stark serpentine barrens and from coastal cliffs to subalpine boulder fields. Although morphologic differences exist among populations in these diverse habitats, they are not consistent. Consequently, infraspecific taxa are not recognized here within <i>A. aleuticum</i>.</p> | --><p>Although the western maidenhair has traditionally been interpreted as an infraspecific variant of <i>Adiantum pedatum</i>, the two taxa are reproductively isolated and differ in an array of morphologic characteristics. Therefore, they are more appropriately considered separate species (C. A. Paris and M. D. Windham 1988). Morphologic differences between <i>A. pedatum</i> and <i>A. aleuticum</i> are subtle; the two may be separated, however, using characteristics in the key. <i>Adiantum aleuticum</i> occurs in a variety of habitats throughout its range, from moist, wooded ravines to stark serpentine barrens and from coastal cliffs to subalpine boulder fields. Although morphologic differences exist among populations in these diverse habitats, they are not consistent. Consequently, infraspecific taxa are not recognized here within <i>A. aleuticum</i>.</p> | ||
| Line 69: | Line 73: | ||
|habitat=Wooded ravines, shaded banks, talus slopes, serpentine barrens, and coastal headlands (uncommon) | |habitat=Wooded ravines, shaded banks, talus slopes, serpentine barrens, and coastal headlands (uncommon) | ||
|elevation=0–3200 m | |elevation=0–3200 m | ||
| − | |distribution=Alta.;B.C.;Nfld.;Que.;Alaska;Ariz.;Calif.;Colo.;Idaho;Maine;Md.;Mont.;Nev.;Oreg.;Pa.;Utah;Vt.;Wash.;Wyo.;Mexico in Chihuahua. | + | |distribution=Alta.;B.C.;Nfld. and Labr. (Nfld.);Que.;Alaska;Ariz.;Calif.;Colo.;Idaho;Maine;Md.;Mont.;Nev.;Oreg.;Pa.;Utah;Vt.;Wash.;Wyo.;Mexico in Chihuahua. |
|reference=None | |reference=None | ||
|publication title=Rhodora | |publication title=Rhodora | ||
|publication year=1991 | |publication year=1991 | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_517.xml |
|genus=Adiantum | |genus=Adiantum | ||
|species=Adiantum aleuticum | |species=Adiantum aleuticum | ||
Latest revision as of 20:23, 5 November 2020
Stems short-creeping or suberect; scales bronzy deep yellow, concolored, margins entire. Leaves lax-arching to stiffly erect or pendent, often densely clustered, 15–110 cm. Petiole 0.5–3 mm diam., glabrous, often glaucous. Blade fan-shaped to funnel-shaped, pseudopedate, 1-pinnate distally, 5–45 × 5–45 cm; proximal pinnae (1–)2–7-pinnate; rachis straight, glabrous, often with glaucous bloom. Segment stalks 0.2–0.9(–1.3) mm, dark color entering into segment base or not. Ultimate segments oblong, long-triangular, or occasionally reniform, ca. 2.5–4 times as long as broad; basiscopic margin straight to oblique, or occasionally excavate; acroscopic margin lobed, lobes separated by narrow to broad incisions 0.2–3 mm wide; apex acute to obtuse, obtuse apices divided into ± angular lobes separated by sinuses 0.6–4 mm deep, margins of lobes sharply denticulate. False indusia transversely oblong to crescent-shaped, 0.2–3.5(–6) mm, glabrous. Spores mostly 37–47 µm diam. 2n = 58.
Phenology: Sporulating summer–fall.
Habitat: Wooded ravines, shaded banks, talus slopes, serpentine barrens, and coastal headlands (uncommon)
Elevation: 0–3200 m
Distribution
Alta., B.C., Nfld. and Labr. (Nfld.), Que., Alaska, Ariz., Calif., Colo., Idaho, Maine, Md., Mont., Nev., Oreg., Pa., Utah, Vt., Wash., Wyo., Mexico in Chihuahua.
Discussion
Adiantum aleuticum is disjunct in wet rock fissures at high elevations in Arizona, Colorado, Montana, Nevada, Utah, Wyoming, and Mexico in Chihuahua, and it is disjunct on serpentine in Newfoundland, Quebec, Maine, Maryland, Pennsylvania, and Vermont.
Although the western maidenhair has traditionally been interpreted as an infraspecific variant of Adiantum pedatum, the two taxa are reproductively isolated and differ in an array of morphologic characteristics. Therefore, they are more appropriately considered separate species (C. A. Paris and M. D. Windham 1988). Morphologic differences between A. pedatum and A. aleuticum are subtle; the two may be separated, however, using characteristics in the key. Adiantum aleuticum occurs in a variety of habitats throughout its range, from moist, wooded ravines to stark serpentine barrens and from coastal cliffs to subalpine boulder fields. Although morphologic differences exist among populations in these diverse habitats, they are not consistent. Consequently, infraspecific taxa are not recognized here within A. aleuticum.
Selected References
None.