View source for Ageratina rothrockii

{{Treatment/ID
|accepted_name=Ageratina rothrockii
|accepted_authority=(A. Gray) R. M. King & H. Robinson
|publications={{Treatment/Publication
|title=Phytologia
|place=19: 216. 1970
|year=1970
}}
|common_names=Rothrock’s snakeroot
|basionyms={{Treatment/ID/Basionym
|name=Eupatorium rothrockii
|authority=A. Gray
|rank=species
|publication_title=in A. Gray et al., Syn. Fl. N. Amer.
|publication_place=1(2): 102. 1884
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Eupatorieae;Ageratina;Ageratina rothrockii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Eupatorieae]]</div><div class="higher-taxon"><small>genus</small>[[Ageratina]]</div><div class="higher-taxon"><small>species</small>[[Ageratina rothrockii]]</div></div>
|volume=Volume 21
|mention_page=page 548
|treatment_page=page 550
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> (20–)40–70(–150) cm (slender, fibrous-rooted crowns, with slender rhizomes). <b>Stems</b> ascending to erect, puberulent to glabrate. <b>Leaves</b> opposite; petioles 2–20 mm; blades (3–5-nerved) lanceolate to lanceolate-ovate, mostly 3–6 × (1.5–)2–3 cm, bases obtuse to truncate, margins serrate to crenate, apices acute to acuminate, sparsely puberulent abaxially, mostly along nerves. <b>Heads</b> clustered. <b>Peduncles</b> 5–12(–20) mm, puberulent. <b>Involucres</b> 5–7 mm. <b>Phyllaries</b>: apices acute, abaxial faces glabrous or glabrescent, eglandular. <b>Corollas</b> white, lobes short-villous. <b>Cypselae</b> sparsely and finely strigose-hirsute. <b>2n</b> = 85 [ca. 100, fide A. M. <b>Powell</b> on label].</span><!--

-->{{Treatment/Body
|phenology=Flowering (Jul–)Aug–Oct.
|habitat=Rocky slopes and ledges, in oak-juniper, pine-oak, pine, aspen, and spruce-fir woodland
|elevation=1700–2400 m
|distribution=Ariz.;N.Mex.;Tex.;Mexico (Chihuahua;Coahuila;Durango;Sonora).
|discussion=<p><i>Ageratina rothrockii</i> is similar to <i>A. altissima</i>, probably its western vicariant, and the two perhaps would be justifiably treated as conspecific.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Ageratina rothrockii
|authority=(A. Gray) R. M. King & H. Robinson
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Eupatorium rothrockii
|family=Asteraceae
|phenology=Flowering (Jul–)Aug–Oct.
|habitat=Rocky slopes and ledges, in oak-juniper, pine-oak, pine, aspen, and spruce-fir woodland
|elevation=1700–2400 m
|distribution=Ariz.;N.Mex.;Tex.;Mexico (Chihuahua;Coahuila;Durango;Sonora).
|reference=None
|publication title=Phytologia
|publication year=1970
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_1393.xml
|tribe=Asteraceae tribe Eupatorieae
|genus=Ageratina
|species=Ageratina rothrockii
}}<!--

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