Difference between revisions of "Echinocereus nicholii"
Phytologia 63: 157. 1987.
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|common_names=Nichol’s hedgehog cactus;golden hedgehog cactus | |common_names=Nichol’s hedgehog cactus;golden hedgehog cactus | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Echinocereus engelmannii var. nicholii | |name=Echinocereus engelmannii var. nicholii | ||
|authority=L. D. Benson | |authority=L. D. Benson | ||
| + | |rank=variety | ||
| + | |publication_title=Proc. Calif. Acad. Sci., ser. | ||
| + | |publication_place=4, 25: 258, plate 25, fig. B. 1944 | ||
}} | }} | ||
|synonyms= | |synonyms= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Echinocereus nicholii | name=Echinocereus nicholii | ||
| − | |||
|authority=(L. D. Benson) B. D. Parfitt | |authority=(L. D. Benson) B. D. Parfitt | ||
|rank=species | |rank=species | ||
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|publication year=1987 | |publication year=1987 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_319.xml |
|subfamily=Cactaceae subfam. Cactoideae | |subfamily=Cactaceae subfam. Cactoideae | ||
|genus=Echinocereus | |genus=Echinocereus | ||
Latest revision as of 21:57, 5 November 2020
Plants 16–30-branched, forming clumps. Stems erect to ascending, cylindric or somewhat tapering distally, 20–30(–70) × (4–)6–9 cm; ribs 10–13, crests slightly undulate; areoles 15–25 mm apart. Spines 13–16 per areole, usually straight, divergent-porrect, pale translucent yellow; radial spines 8–12 per areole, 5–25 mm; central spines 4–6(–8) per areole, 30–72 mm, abaxial central spine usually descending, paler than other central spines, often fading whitish, somewhat flattened. Flowers 4–6 × 5–7 cm; flower tube 18–25 × 12–30 mm; flower tube hairs 1 mm; inner tepals usually pale pink with midstripes slightly darker, proximal 1/3 greenish, 30–40 × 5–10 mm, tips relatively thin and delicate; anthers yellow; nectar chamber to 7 mm. Fruits green, becoming bronze where exposed to sun, 23–34 mm, pulp white. 2n = 22.
Phenology: Flowering Mar–Apr; fruiting Jun.
Habitat: Arizona Upland Subdivision of Sonoran Desert, exposed slopes, bajadas, hills, mountains, desert scrub, igneous and sedimentary substrates
Elevation: 300-900 m
Distribution
Ariz., Mexico (Sonora).
Discussion
Although it was initially considered a variety of Echinocereus engelmannii, E. nicholii differs in chromosome number and a suite of morphologic characteristics. With its non-erumpent flower buds, diploid chromosome number, relatively small and usually pale flowers, green fruits, and exclusively yellow spines, E. nicholii more closely resembles E. ledingii than E. engelmannii.
Selected References
None.