Difference between revisions of "Pentagramma triangularis subsp. triangularis"
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Petiole </b>glabrous, not viscid-glandular. <b>Blade</b> thin and herbaceous to somewhat thick and leathery, not viscid-glandular, abaxially densely pale to bright yellow, adaxially glabrous. <b>Distal</b> pinnae mostly regularly lobed. <b>Proximal</b> basiscopic lobes of basal pinnae pinnatifid, often deeply so. <b>2n</b> = 60, ca. 90, 120.</span><!-- |
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|genus=Pentagramma | |genus=Pentagramma | ||
|species=Pentagramma triangularis | |species=Pentagramma triangularis | ||
|subspecies=Pentagramma triangularis subsp. triangularis | |subspecies=Pentagramma triangularis subsp. triangularis | ||
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Revision as of 14:16, 27 July 2019
Petiole glabrous, not viscid-glandular. Blade thin and herbaceous to somewhat thick and leathery, not viscid-glandular, abaxially densely pale to bright yellow, adaxially glabrous. Distal pinnae mostly regularly lobed. Proximal basiscopic lobes of basal pinnae pinnatifid, often deeply so. 2n = 60, ca. 90, 120.
Habitat: Chaparral, pine and oak woodlands
Elevation: 50–1800 m
Distribution
B.C., Calif., Idaho, Oreg., Wash., Mexico in Baja California.
Discussion
We here restrict Pentagramma triangularis subsp. triangularis to plants with yellow farina and glabrous adaxial leaf surfaces occurring throughout a large region in westernmost North America. This subspecies comprises a complex of morphological, cytological, and phytochemical variants, at least some of which may deserve formal taxonomic recognition, following more detailed studies. Plants with yellow farina reported from Arizona, Nevada, and Utah may represent tetraploid hybrids between P. triangularis subsp. triangularis and P. triangularis subsp. maxonii and are not mapped herein.
Selected References
None.