View source for Physocarpus alternans

{{Treatment/ID
|accepted_name=Physocarpus alternans
|accepted_authority=(M. E. Jones) J. T. Howell
|publications={{Treatment/Publication
|title=Proc. Calif. Acad. Sci., ser.
|place=4, 20: 130. 1931
|year=1931
}}
|common_names=Nevada or dwarf nine-bark
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Neillia monogyna var. alternans
|authority=M. E. Jones
|rank=variety
|publication_title=Zoë
|publication_place=4: 42. 1893
}}
|synonyms={{Treatment/ID/Synonym
|name=Physocarpus alternans subsp. annulatus
|authority=J. T. Howell
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=P. alternans subsp. panamintensis
|authority=J. T. Howell
|rank=subspecies
}}
|hierarchy=Rosaceae;Rosaceae subfam. Amygdaloideae;Rosaceae tribe Neillieae;Physocarpus;Physocarpus alternans
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Amygdaloideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Neillieae]]</div><div class="higher-taxon"><small>genus</small>[[Physocarpus]]</div><div class="higher-taxon"><small>species</small>[[Physocarpus alternans]]</div></div>
|volume=Volume 9
|mention_page=page 348
|treatment_page=page 350
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> 15 dm, densely branched. <b>Stems</b> orientation not recorded, brown becoming gray, stellate-hairy, glabrescent. <b>Leaves</b>: stipules oblong to narrowly elliptic or rhombic, 2–4 × 1.5–2 mm; petiole 2–10 mm; blade broadly ovate to orbiculate, 0.5–2 × 0.5–2 cm, slightly longer than wide, base rounded to truncate or slightly cordate, (0)3- or 5(7)-lobed, margins crenate to doubly crenate, apex rounded, abaxial surface more densely stellate-hairy (especially on veins), adaxial sparsely so. <b>Inflorescences</b> 5–10(–15)-flowered, open, umbel-like racemes, 3 cm diam.; bracts similar to stipules. <b>Pedicels</b> 0.6–1.5 cm, densely stellate-hairy. <b>Flowers</b> 7 mm diam.; hypanthium cup-shaped to campanulate, 1.5–3 mm, stellate-hairy; sepals pale green to white, darker in center, triangular to narrowly ovate, 2.5–3 mm, apex gland-tipped, surfaces stellate-hairy; petals white to pale pink, broadly obovate to orbiculate, 3 × 2.5 mm; stamens 20–30, unequal (alternately long and short), shorter than petals, anthers pink to dark brown; carpels 1(2), if 2 then connate at least 1/2 their lengths, indumentum not recorded. <b>Follicles</b> 1(2), pale buff, shape not recorded, 3–6 mm (lengths equal to or slightly exceeding sepals), densely stellate-hairy; styles 2.5 mm sometimes distinctly bent. <b>Seeds</b> 1 or 2, 2 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Jul; fruiting Aug.
|habitat=Dry rocky canyon slopes, among pinyon pine, juniper, and Cercocarpus woodlands
|elevation=1500–3100 m
|distribution=Calif.;Colo.;Idaho;Nev.;Utah;Wyo.
|discussion=<p>The two subspecies described from California by Howell appear to be local variants with relatively small differences in leaf and hypanthium indumentum that probably do not merit formal recognition. Being drought tolerant, <i>Physocarpus alternans</i> should be considered more often for planting in dry habitats.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Physocarpus alternans
|authority=(M. E. Jones) J. T. Howell
|rank=species
|parent rank=genus
|synonyms=Physocarpus alternans subsp. annulatus;P. alternans subsp. panamintensis
|basionyms=Neillia monogyna var. alternans
|family=Rosaceae
|phenology=Flowering Jun–Jul; fruiting Aug.
|habitat=Dry rocky canyon slopes, among pinyon pine, juniper, and Cercocarpus woodlands
|elevation=1500–3100 m
|distribution=Calif.;Colo.;Idaho;Nev.;Utah;Wyo.
|reference=None
|publication title=Proc. Calif. Acad. Sci., ser.
|publication year=1931
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V9/V9_577.xml
|subfamily=Rosaceae subfam. Amygdaloideae
|tribe=Rosaceae tribe Neillieae
|genus=Physocarpus
|species=Physocarpus alternans
}}<!--

-->[[Category:Treatment]][[Category:Physocarpus]]