Difference between revisions of "Echinomastus johnsonii"
Calif. Cact., 75. 1935.
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− | --><span class="statement" id="st- | + | --><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 | -->{{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 | |habitat=Mojave desert scrub and upper edge of Sonoran desert scrub, rocky slopes, gravelly hills | ||
|elevation=500-1400 m | |elevation=500-1400 m | ||
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|basionyms=Echinocactus johnsonii | |basionyms=Echinocactus johnsonii | ||
|family=Cactaceae | |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 | |habitat=Mojave desert scrub and upper edge of Sonoran desert scrub, rocky slopes, gravelly hills | ||
|elevation=500-1400 m | |elevation=500-1400 m | ||
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|publication year=1935 | |publication year=1935 | ||
|special status= | |special status= | ||
− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V4/V4_362.xml |
|subfamily=Cactaceae subfam. Cactoideae | |subfamily=Cactaceae subfam. Cactoideae | ||
|genus=Echinomastus | |genus=Echinomastus | ||
|species=Echinomastus johnsonii | |species=Echinomastus johnsonii | ||
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-->[[Category:Treatment]][[Category:Echinomastus]] | -->[[Category:Treatment]][[Category:Echinomastus]] |
Revision as of 15:07, 27 July 2019
Stems 10–25 × 7–15 cm; ribs (13–)18–21; areoles (14–)21–26 mm apart along ribs; areolar glands present at least seasonally. Spines 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. Fruits dehiscent only along single, longitudinal split, ± spheric, 17–18 mm. 2n = 22.
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
Echinomastus johnsonii varies geographically in both flower and spine color. The yellow-flowered plants have been named E. johnsonii 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.
Selected References
None.