Difference between revisions of "Epithelantha bokei"
Cact. Succ. J. (Los Angeles) 41: 185, figs. 2, 3(lower). 1969.
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|name=Epithelantha micromeris var. bokei | |name=Epithelantha micromeris var. bokei | ||
|authority=(L. D. Benson) Glass & R. A. Foster | |authority=(L. D. Benson) Glass & R. A. Foster | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Epithelantha;Epithelantha bokei | |hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Epithelantha;Epithelantha bokei | ||
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name=Epithelantha bokei | name=Epithelantha bokei | ||
| − | |||
|authority=L. D. Benson | |authority=L. D. Benson | ||
|rank=species | |rank=species | ||
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|publication year=1969 | |publication year=1969 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V4/V4_438.xml |
|subfamily=Cactaceae subfam. Cactoideae | |subfamily=Cactaceae subfam. Cactoideae | ||
|genus=Epithelantha | |genus=Epithelantha | ||
Revision as of 21:40, 16 December 2019
Plants unbranched (very rarely branched), appearing pure white or slightly yellowish, smooth, and shiny in general aspect. Stems flat-topped, disk-shaped, short cylindric, or cylindric, 2–5 cm diam. Spines (40–)50–90 per areole, in more than 3 superimposed series; mature lateral spine clusters uniformly white to creamy yellow, 2–2.5(–4) mm diam.; longest intact spines 4.5–7 mm; worn spines 0.1–2 mm. Flowers conspicuously exserted beyond longer spines at stem apex, 1–1.7 × 1–1.7 cm; inner tepals 13–21 per flower, 5–6(–9) × 1.5–2.3(–3) mm; stamens 20–40. 2n = 22.
Phenology: Flowering spring–early summer (May–Jun); fruiting summer–fall.
Habitat: Chihuahuan Desert on rocky, barren hills of sedimentary substrates
Elevation: 700[-1400] m
Distribution
Tex., Mexico (Coahuila).
Discussion
Epithelantha bokei is an obligate outcrosser. Its flowers tend to open in mid afternoon, when those of E. micromeris are already closing.
Epithelantha bokei is in the Center for Plant Conservation’s National Collection of Endangered Plants.
Selected References
None.