Difference between revisions of "Pediocactus knowltonii"
Cact. Succ. J. (Los Angeles) 32: 193. 1960.
Common names: Knowlton’s minute cactus
Synonyms: Pediocactus bradyi var. knowltonii (L. D. Benson) BackebergPediocactus simpsonii var. knowltonii (L. D. Benson) Halda
Treatment appears in FNA Volume 4. Mentioned on page 215.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>branched or unbranched. <b>Stems</b> globular to short cylindric, 0.7–5.5 × 1–3 cm; areoles circular, villous. <b>Spines</b> smooth, relatively hard, all radial, mostly 18–26 per areole, spreading, recurved, or somewhat pectinate, reddish tan, pink, or white, 1–1.5 mm, canescent. <b>Flowers</b> 1–3.5 × 1–2.5 cm; scales and outer tepals essentially entire, often undulate; outer tepals with brownish midstripes to 1.5 mm wide, 4–17 × 4–6 mm; inner tepals pink, oblanceolate, 8–25 × 3–8 mm. <b>Fruits</b> green, drying reddish tan, turbinate,4 × 3 mm. <b>Seeds</b> black, 1.5 × 1–1.2 mm, papillate but not rugose.</span><!-- |
-->{{Treatment/Body | -->{{Treatment/Body | ||
| + | |phenology=Flowering spring. | ||
|habitat=Gravel pavements in pinyon-juniper woodlands with mixed sagebrush | |habitat=Gravel pavements in pinyon-juniper woodlands with mixed sagebrush | ||
|elevation=2000 m | |elevation=2000 m | ||
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|basionyms= | |basionyms= | ||
|family=Cactaceae | |family=Cactaceae | ||
| + | |phenology=Flowering spring. | ||
|habitat=Gravel pavements in pinyon-juniper woodlands with mixed sagebrush | |habitat=Gravel pavements in pinyon-juniper woodlands with mixed sagebrush | ||
|elevation=2000 m | |elevation=2000 m | ||
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|publication year=1960 | |publication year=1960 | ||
|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_402.xml |
|subfamily=Cactaceae subfam. Cactoideae | |subfamily=Cactaceae subfam. Cactoideae | ||
|genus=Pediocactus | |genus=Pediocactus | ||
|species=Pediocactus knowltonii | |species=Pediocactus knowltonii | ||
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Revision as of 14:09, 27 July 2019
Plants branched or unbranched. Stems globular to short cylindric, 0.7–5.5 × 1–3 cm; areoles circular, villous. Spines smooth, relatively hard, all radial, mostly 18–26 per areole, spreading, recurved, or somewhat pectinate, reddish tan, pink, or white, 1–1.5 mm, canescent. Flowers 1–3.5 × 1–2.5 cm; scales and outer tepals essentially entire, often undulate; outer tepals with brownish midstripes to 1.5 mm wide, 4–17 × 4–6 mm; inner tepals pink, oblanceolate, 8–25 × 3–8 mm. Fruits green, drying reddish tan, turbinate,4 × 3 mm. Seeds black, 1.5 × 1–1.2 mm, papillate but not rugose.
Phenology: Flowering spring.
Habitat: Gravel pavements in pinyon-juniper woodlands with mixed sagebrush
Elevation: 2000 m
Discussion
Of conservation concern.
Pediocactus knowltonii is the smallest and rarest member of the genus. The species is very closely related to P. simpsonii; chloroplast DNA sequence analysis provides support that it represents a recent developmental mutation within P. simpsonii (J. M. Porter et al. unpubl.).
Selected References
None.
Lower Taxa
None.