Difference between revisions of "Mammillaria heyderi"
Allg. Gartenzeitung 16: 20. 1848.
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|common_names=Little nipple cactus | |common_names=Little nipple cactus | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
|synonyms= | |synonyms= | ||
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| − | |distribution= | + | |distribution=Ariz.;N.Mex.;Okla.;Tex.;n Mexico. |
|discussion=<p>Varieties 2 (2 in the flora).</p><!-- | |discussion=<p>Varieties 2 (2 in the flora).</p><!-- | ||
--><p>Green fruits of <i>Mammillaria heyderi</i> with fully mature, viable seeds precede the ripe (elongate) fruits by six months to a year.</p> | --><p>Green fruits of <i>Mammillaria heyderi</i> with fully mature, viable seeds precede the ripe (elongate) fruits by six months to a year.</p> | ||
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|basionyms= | |basionyms= | ||
|family=Cactaceae | |family=Cactaceae | ||
| − | |distribution= | + | |distribution=Ariz.;N.Mex.;Okla.;Tex.;n Mexico. |
|reference=None | |reference=None | ||
|publication title=Allg. Gartenzeitung | |publication title=Allg. Gartenzeitung | ||
|publication year=1848 | |publication year=1848 | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V4/V4_468.xml |
|subfamily=Cactaceae subfam. Cactoideae | |subfamily=Cactaceae subfam. Cactoideae | ||
|genus=Mammillaria | |genus=Mammillaria | ||
Revision as of 23:16, 27 May 2020
Plants unbranched, protruding relatively little above soil. Roots obconic taproots; secondary roots diffuse. Stems top-shaped, flat-topped (aerial part sometimes hemispheric in old age or in dense subtropical vegetation), protruding above ground 0–2 × (4–)7.5–15 cm, firm; tubercles 9–15(–20) × 3–7 mm; axils with short wool, bristles absent; cortex and pith not mucilaginous; latex abundant in healthy tissue throughout cortex of stem, tubercles, and sometimes flower receptacle, sticky, white. Spines (8–)10–18(–27) per areole, usually brownish, darker at tip, glabrous; radial spines (8–)10–22(–26) per areole, white to white-and-brown or brown, needlelike, 6–15(–16) mm, stiff, abaxial spines longest; central spines (0–)1(–4) per areole, porrect or ascending, not hooked, (0.5–)2–8 × 0.15–0.45 mm; subcentral spines 0. Flowers 1.9–3.8 × 1.5–3 cm; outermost tepal margins entire; inner tepals white, greenish or cream to pale pink, with tan, pink, greenish, or brownish midstripes, 11–19 × 2–2.5 mm; stigma lobes externally green, internally green or red (or pink), 2.5–3 mm. Fruits brilliant red: scarlet, carmine, or crimson, obovoid to clavate, 10–35(–40) × 5–8 mm, juicy only in fruit walls; floral remnant weakly persistent. Seeds reddish brown, sometimes yellowish when fresh, 1–1.2 mm, deeply pitted; testa thin, relatively flexible; anticlinal cell walls sinuate, interstices narrower than pit diameters; pits cavernous or deeply concave. 2n = 22.
Distribution
Ariz., N.Mex., Okla., Tex., n Mexico.
Discussion
Varieties 2 (2 in the flora).
Green fruits of Mammillaria heyderi with fully mature, viable seeds precede the ripe (elongate) fruits by six months to a year.
Selected References
None.
Key
| 1 | Central spines 0.15-0.35 mm diam.; radial spines (7-)13-17(-26) per areole, abaxial radial spines 6-11(-16) mm; e of El Paso, Texas, New Mexico, Oklahoma. | Mammillaria heyderi var. heyderi |
| 1 | Central spines 0.35-0.45 mm diam.; radial spines 10-14 per areole, abaxial radial spines 9-15 mm; El Paso, Texas, w to Arizona | Mammillaria heyderi var. bullingtoniana |