View source for Mammillaria heyderi

{{Treatment/ID
|accepted_name=Mammillaria heyderi
|accepted_authority=Muehlenpfordt
|publications={{Treatment/Publication
|title=Allg. Gartenzeitung
|place=16: 20. 1848
|year=1848
}}
|common_names=Little nipple cactus
|basionyms=
|synonyms=
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Mammillaria;Mammillaria heyderi
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cactaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Cactaceae subfam. Cactoideae]]</div><div class="higher-taxon"><small>genus</small>[[Mammillaria]]</div><div class="higher-taxon"><small>species</small>[[Mammillaria heyderi]]</div></div>
|volume=Volume 4
|mention_page=page 249, 256
|treatment_page=page 255
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>unbranched, protruding relatively little above soil. <b>Roots</b> obconic taproots; secondary roots diffuse. <b>Stems</b> 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. <b>Spines</b> (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. <b>Flowers</b> 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. <b>Fruits</b> brilliant red: scarlet, carmine, or crimson, obovoid to clavate, 10–35(–40) × 5–8 mm, juicy only in fruit walls; floral remnant weakly persistent. <b>Seeds</b> 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. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|distribution=sw United States;n Mexico.
|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>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|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|Mammillaria heyderi var. heyderi]]
|-id=key-0-1
|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|Mammillaria heyderi var. bullingtoniana]]
|}
</div></div><!--

-->{{#Taxon:
name=Mammillaria heyderi
|author=
|authority=Muehlenpfordt
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Cactaceae
|distribution=sw United States;n Mexico.
|reference=None
|publication title=Allg. Gartenzeitung
|publication year=1848
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V4/V4_468.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Mammillaria
|species=Mammillaria heyderi
}}<!--

-->[[Category:Treatment]][[Category:Mammillaria]]