Difference between revisions of "Balsamorhiza macrophylla"

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 350. 1840.

Synonyms: Balsamorhiza hookeri var. idahoensis (W. M. Sharp) Cronquist Balsamorhiza macrophylla var. idahoensis W. M. Sharp
Treatment appears in FNA Volume 21. Treatment on page 98. Mentioned on page 94, 95.
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|name=Balsamorhiza hookeri var. idahoensis
 
|name=Balsamorhiza hookeri var. idahoensis
 
|authority=(W. M. Sharp) Cronquist
 
|authority=(W. M. Sharp) Cronquist
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|name=Balsamorhiza macrophylla var. idahoensis
 
|name=Balsamorhiza macrophylla var. idahoensis
 
|authority=W. M. Sharp
 
|authority=W. M. Sharp
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|elevation=1000–2400 m
 
|elevation=1000–2400 m
 
|distribution=Idaho;Utah;Wyo.
 
|distribution=Idaho;Utah;Wyo.
|discussion=<p>Balsamorhiza macrophylla is a high polyploid; it occurs sympatrically with B. sagittata. It evidently arose from hybridization between B. sagittata and B. hispidula. Balsamorhiza macrophylla has the multi-branched caudices and massive taproots of the former, and the leaf dissection of the latter. No hybrids with other species are known. Presumably, the high-polyploid chromosome complement precludes interbreeding. Plants of var. idahoensis are smaller, are known only from southwestern Idaho and northeastern Utah, and differ from var. macrophylla by being pilose, with strongly shaggy-pilose involucres. More study may determine that var. idahoensis merits specific rank. The Utah populations are not well understood and deserve attention.</p>
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|discussion=<p><i>Balsamorhiza macrophylla</i> is a high polyploid; it occurs sympatrically with <i>B. sagittata</i>. It evidently arose from hybridization between <i>B. sagittata</i> and <i>B. hispidula</i>. <i>Balsamorhiza macrophylla</i> has the multi-branched caudices and massive taproots of the former, and the leaf dissection of the latter. No hybrids with other species are known. Presumably, the high-polyploid chromosome complement precludes interbreeding. Plants of <i></i>var.<i> idahoensis</i> are smaller, are known only from southwestern Idaho and northeastern Utah, and differ from var. macrophylla by being pilose, with strongly shaggy-pilose involucres. More study may determine that <i></i>var.<i> idahoensis</i> merits specific rank. The Utah populations are not well understood and deserve attention.</p>
 
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|publication year=1840
 
|publication year=1840
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V21_229.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V21_229.xml
 
|tribe=Asteraceae tribe Heliantheae
 
|tribe=Asteraceae tribe Heliantheae
 
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ecliptinae
 
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ecliptinae

Revision as of 15:33, 18 September 2019

Plants 30–45(–100) cm. Basal leaves green, ovate to lanceolate, 20–50+ × 8–15 cm (pinnatifid, lobes lanceolate, 20–80+ × 10–40 mm, entire or ± dentate), bases ± cuneate, ultimate margins usually entire (plane or weakly revolute, ciliate), apices obtuse to acute, faces scabrous or piloso-hirtellous to pilose (at least abaxial usually gland-dotted as well). Heads usually borne singly. Involucres ± hemispheric, 20–30 mm diam. Outer phyllaries lance-ovate or lanceolate to lance-linear, 12–30(–40) mm, equaling or surpassing inner (margins ciliate), apices acute to attenuate. Ray laminae 35–50+ mm. 2n = 100 ± 2.


Phenology: Flowering May–Jul.
Habitat: Deep soils, rocky meadows, sagebrush scrublands, conifer forests
Elevation: 1000–2400 m

Discussion

Balsamorhiza macrophylla is a high polyploid; it occurs sympatrically with B. sagittata. It evidently arose from hybridization between B. sagittata and B. hispidula. Balsamorhiza macrophylla has the multi-branched caudices and massive taproots of the former, and the leaf dissection of the latter. No hybrids with other species are known. Presumably, the high-polyploid chromosome complement precludes interbreeding. Plants of var. idahoensis are smaller, are known only from southwestern Idaho and northeastern Utah, and differ from var. macrophylla by being pilose, with strongly shaggy-pilose involucres. More study may determine that var. idahoensis merits specific rank. The Utah populations are not well understood and deserve attention.

Lower Taxa

None.
... more about "Balsamorhiza macrophylla"
William A. Weber +
Nuttall +
Idaho +, Utah +  and Wyo. +
1000–2400 m +
Deep soils, rocky meadows, sagebrush scrublands, conifer forests +
Flowering May–Jul. +
Trans. Amer. Philos. Soc., n. s. +
helton1972a +
Balsamorhiza hookeri var. idahoensis +  and Balsamorhiza macrophylla var. idahoensis +
Balsamorhiza macrophylla +
Balsamorhiza subg. Balsamorhiza +
species +