View source for Mammillaria thornberi

{{Treatment/ID
|accepted_name=Mammillaria thornberi
|accepted_authority=Orcutt
|publications={{Treatment/Publication
|title=W. Amer. Sci.
|place=12: 161. 1902
|year=1902
}}
|common_names=Thornber ’s nipple cactus
|basionyms=
|synonyms=
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Mammillaria;Mammillaria thornberi
|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 thornberi]]</div></div>
|volume=Volume 4
|mention_page=page 247, 248
|treatment_page=page 253
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>branching prolifically from base, every branch with independent root system, connections to rest of clone ephemeral, resulting in dense clumps of independently rooted stems. <b>Roots</b> diffuse, upper portion not enlarged. <b>Stems</b> slender cylindric, 4.5–10(–30) × 2–3.5 cm, tapered at base, firm; tubercles 5–9 × 5–9 mm; axils appearing naked; cortex and pith not mucilaginous; latex absent. <b>Spines</b> 14–22(–23) per areole, whitish to yellowish near base, pale reddish brown to nearly black toward tips, glabrous; radial spines 13–21 per areole, whitish, with reduced dark tips relative to central spines, bristlelike, 5–9 × 0.16 mm, stiff; central spines 1(–3) per areole, porrect, hooked, (7–)9–18 × 0.16–0.45 mm; subcentral spines 0(–3) per areole, adaxial to central spines, ± transitional to radial spines. <b>Flowers</b> 1.5–3 × 1.2–2.5 cm; outermost tepal margins densely short fringed; inner tepals white or pinkish with bright rose-pink midstripes, 14–19 × 5–7 mm; stigma lobes magenta, 3–6 mm. <b>Fruits</b> bright red, obovoid to nearly clavate, 7–15 × 4–7 mm, juicy only in fruit walls; floral remnant persistent. <b>Seeds</b> black, 0.9–1.1 × 0.8–1.1 × 0.7 mm, pitted; testa hard, brittle; anticlinal cell walls straight (not undulate); interstices conspicuously wider than pit diameters; pits bowl-shaped. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–May, Jul–Aug; fruiting Oct–Nov, Feb–Mar.
|habitat=Sonoran desert scrub, valley floors, under shrubs, silty or sandy soils
|elevation=400-600 m
|distribution=Ariz.;Mexico (Sonora).
|discussion=<p>The epithet fasciculata was long misapplied to <i>Mammillaria thornberi</i>; it correctly pertains to <i>Echinocereus fasciculatus</i> (Engelmann) L. D. Benson.</p><!--
--><p><i>Mammillaria thornberi</i> is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Mammillaria thornberi
|authority=Orcutt
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Cactaceae
|phenology=Flowering Apr–May, Jul–Aug; fruiting Oct–Nov, Feb–Mar.
|habitat=Sonoran desert scrub, valley floors, under shrubs, silty or sandy soils
|elevation=400-600 m
|distribution=Ariz.;Mexico (Sonora).
|reference=None
|publication title=W. Amer. Sci.
|publication year=1902
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_461.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Mammillaria
|species=Mammillaria thornberi
}}<!--

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