View source for Echinomastus johnsonii

{{Treatment/ID
|accepted_name=Echinomastus johnsonii
|accepted_authority=(Parry ex Engelmann) E. M. Baxter
|publications={{Treatment/Publication
|title=Calif. Cact.,
|place=75. 1935
|year=1935
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Echinocactus johnsonii
|authority=Parry ex Engelmann
|rank=species
|publication_title=in S. Watson, Botany (Fortieth Parallel),
|publication_place=117. 1871 (as johnsoni)
}}
|synonyms={{Treatment/ID/Synonym
|name=Echinomastus johnsonii var. lutescens
|authority=(Parish) Wiggins
|rank=variety
}} {{Treatment/ID/Synonym
|name=Neolloydia johnsonii
|authority=(Parry ex Engelmann) N. P. Taylor
|rank=species
}} {{Treatment/ID/Synonym
|name=Sclerocactus johnsonii
|authority=
|rank=species
}}
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Echinomastus;Echinomastus johnsonii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cactaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Cactaceae subfam. Cactoideae]]</div><div class="higher-taxon"><small>genus</small>[[Echinomastus]]</div><div class="higher-taxon"><small>species</small>[[Echinomastus johnsonii]]</div></div>
|volume=Volume 4
|mention_page=page 192, 193
|treatment_page=page 194
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>10–25 × 7–15 cm; ribs (13–)18–21; areoles (14–)21–26 mm apart along ribs; areolar glands present at least seasonally. <b>Spines</b> 13–24 per areole, pale yellow to grayish lavender to maroon; radial spines 9–16 per areole; abaxial (shortest) radial spine 6–19 × (0.2–)0.4–0.6 mm; adaxial and lateral (longest) radial spines ca. 27–40 mm; central spines 4–9 per areole, present at all ages, 27–41 × (0.7–)1.1–1.4 mm; longest central spine straight to strongly decurved; abaxial central spine porrect, ca. 27–40 mm Flowers 4–6.5 × 4–7.7 cm; inner tepals yellow or pink to magenta, basal portions blotched with maroon, 2.5–3.7 × 1–1.8 cm; stigma lobes yellowish white to green. <b>Fruits</b> dehiscent only along single, longitudinal split, ± spheric, 17–18 mm. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering (Feb-)Mar–May; fruiting Apr–Jun.
|habitat=Mojave desert scrub and upper edge of Sonoran desert scrub, rocky slopes, gravelly hills
|elevation=500-1400 m
|distribution=Ariz.;Calif.;Nev.;Utah.
|discussion=<p><i>Echinomastus johnsonii</i> varies geographically in both flower and spine color. The yellow-flowered plants have been named <i>E. johnsonii</i> var. lutescens. The pink-flowered plants occur in separate populations, as far as is known, to the north of the yellow-flowered plants, but the interface between the two forms is poorly understood.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Echinomastus johnsonii
|authority=(Parry ex Engelmann) E. M. Baxter
|rank=species
|parent rank=genus
|synonyms=Echinomastus johnsonii var. lutescens;Neolloydia johnsonii;Sclerocactus johnsonii
|basionyms=Echinocactus johnsonii
|family=Cactaceae
|phenology=Flowering (Feb-)Mar–May; fruiting Apr–Jun.
|habitat=Mojave desert scrub and upper edge of Sonoran desert scrub, rocky slopes, gravelly hills
|elevation=500-1400 m
|distribution=Ariz.;Calif.;Nev.;Utah.
|reference=None
|publication title=Calif. Cact.,
|publication year=1935
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_362.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Echinomastus
|species=Echinomastus johnsonii
}}<!--

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