View source for Grusonia aggeria

{{Treatment/ID
|accepted_name=Grusonia aggeria
|accepted_authority=(Ralston & Hilsenbeck) E. F. Anderson
|publications={{Treatment/Publication
|title=Cact. Succ. J. (Los Angeles)
|place=71: 325. 1999
|year=1999
}}
|basionyms={{Treatment/ID/Basionym
|name=Opuntia aggeria
|authority=Ralston & Hilsenbeck
|rank=species
|publication_title=Madroño
|publication_place=36: 226, fig. 2. 1989
}}
|synonyms=
|hierarchy=Cactaceae;Cactaceae subfam. Opuntioideae;Grusonia;Grusonia aggeria
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cactaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Cactaceae subfam. Opuntioideae]]</div><div class="higher-taxon"><small>genus</small>[[Grusonia]]</div><div class="higher-taxon"><small>species</small>[[Grusonia aggeria]]</div></div>
|volume=Volume 4
|mention_page=
|treatment_page=page 119
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> forming clumps, 3–9 cm. <b>Roots</b> tuberlike, 7–8 × 2.5–3 cm. <b>Stem</b> segments short cylindric to clavate, 3.5–9 × 1.5–3 cm; tubercles 8–18(–22) mm; areoles circular 3–4 mm in diam.; wool yellowish white. <b>Spines</b> (1–)5–15 per areole, mostly in distal areoles, 3–5 cm; major 1–3 abaxial spines deflexed, usually chalky white (at least adaxially), flattened to angular-flattened, longest central abaxial spine commonly twisted or curved (at times the only spine in depauperate specimens, those mostly from Big Bend region of Texas); major 0–5 adaxial spines divergent, ascending, brown to blackish and sometimes chalky, ± terete. <b>Glochids</b> adaxial in areole, yellow, to 4 mm. <b>Flowers</b>: inner tepals bright yellow, 25 mm; filaments green; style cream; stigma lobes pale yellow-green. <b>Fruits</b> yellow, aging gray, cylindric to ellipsoid, 20–25(–50) × 10–15 mm, becoming dry, spineless, glochidiate; areoles 25–35. <b>Seeds</b> yellowish to brownish, ± circular, to 5 mm in diam., with various numbers and sizes of bumps. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring (Mar–May).
|habitat=Chihuahuan Desert, sandy or gravelly flats, scrub with creosote bush, lower slopes, limestone or igneous substrates
|elevation=600-1500 m
|distribution=Tex.;Mexico (Coahuila).
|discussion=<p><i>Grusonia aggeria</i> is based on the “type” of “<i>Opuntia</i> grahamii × O. schottii” described by M. S. Anthony (1956). It is not a hybrid, however, between the two tetraploid putative parental taxa; it is instead a fully fertile, diploid species.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Grusonia aggeria
|authority=(Ralston & Hilsenbeck) E. F. Anderson
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Opuntia aggeria
|family=Cactaceae
|phenology=Flowering spring (Mar–May).
|habitat=Chihuahuan Desert, sandy or gravelly flats, scrub with creosote bush, lower slopes, limestone or igneous substrates
|elevation=600-1500 m
|distribution=Tex.;Mexico (Coahuila).
|reference=None
|publication title=Cact. Succ. J. (Los Angeles)
|publication year=1999
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_230.xml
|subfamily=Cactaceae subfam. Opuntioideae
|genus=Grusonia
|species=Grusonia aggeria
}}<!--

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