View source for Mammillaria wrightii

{{Treatment/ID
|accepted_name=Mammillaria wrightii
|accepted_authority=Engelmann
|publications={{Treatment/Publication
|title=Proc. Amer. Acad. Arts
|place=3: 262. 1856
|year=1856
}}
|basionyms=
|synonyms=
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Mammillaria;Mammillaria wrightii
|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 wrightii]]</div></div>
|volume=Volume 4
|mention_page=page 236, 248
|treatment_page=page 250
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>usually unbranched. <b>Roots</b>: upper portion of primary root somewhat thickened and succulent proximally, otherwise fibrous. <b>Stems</b> flat-topped or spheric, 4–8 × 4–8 cm, ± flaccid; tubercles 6–24 mm; axils appearing naked; cortex and pith mucilaginous; latex absent. <b>Spines</b> 9–31(–34) per areole, white, usually tipped brown; radial spines 8–30 per areole, in 1 series, glabrous (puberulent in first year flowering plants); lateral spines bristlelike, 7–11 mm, stiff, longest and thickest of spines; adaxial spines often darker; central spines 1–4(–7) per areole, porrect or strongly projecting, 1 or all hooked, (5–)12–14(–21) mm; subcentral spines 0. <b>Flowers</b> 2.5–3.5(–5.2) × 2.2–4.5(–7.5) cm; outer tepal margins conspicuously fringed; inner tepals rose-pink or magenta [white], margins often paler; stigma lobes yellow or pale green (rarely reddish). <b>Fruits</b> green or dull purple, spheric to ovoid or obovoid, (9–)13–20(–28) × (6–)7–1.9(–26) mm, juicy throughout; floral remnant persistent. <b>Seeds</b> black, 1.3–1.5 mm, pitted; testa hard, anticlinal cell walls straight (not undulate); interstices conspicuously narrower than pit diameters; pits bowl-shaped. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|distribution=sw United States;Mexico.
|discussion=<p>Varieties 3 (2 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=zimmerman1977a
|text=Zimmerman, A. D. and D. A. Zimmerman. 1977. A revision of the United States taxa of the Mammillaria wrightii complex with remarks upon the northern Mexican populations. Cact. Succ. J. (Los Angeles) 49: 23–34, 51–62.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Radial spines usually 8-15 per areole; fruits 12.5-26 mm diam
|[[Mammillaria wrightii var. wrightii|Mammillaria wrightii var. wrightii]]
|-id=key-0-1
|1
|Radial spines usually 16-30 per areole; fruits 6-15 mm diam
|[[Mammillaria wrightii var. wilcoxii|Mammillaria wrightii var. wilcoxii]]
|}
</div></div><!--

-->{{#Taxon:
name=Mammillaria wrightii
|author=
|authority=Engelmann
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Cactaceae
|distribution=sw United States;Mexico.
|reference=zimmerman1977a
|publication title=Proc. Amer. Acad. Arts
|publication year=1856
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V4/V4_455.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Mammillaria
|species=Mammillaria wrightii
}}<!--

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