View source for Amsonia subg. Articularia

{{Treatment/ID
|accepted_name=Amsonia subg. Articularia
|accepted_authority=Woodson
|publications={{Treatment/Publication
|title=Ann. Missouri Bot. Gard.
|place=15: 418. 1928
|year=1928
}}
|basionyms=
|synonyms=
|hierarchy=Apocynaceae;Amsonia;Amsonia subg. Articularia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Apocynaceae]]</div><div class="higher-taxon"><small>genus</small>[[Amsonia]]</div><div class="higher-taxon"><small>subgenus</small>[[Amsonia subg. Articularia]]</div></div>
|volume=Volume 14
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>usually branched for most of length (occasionally only distally). <b>Bracts</b> on distal portions of inflorescences linear to narrowly deltate, mostly 2–6 mm (seldom less than 2 mm). <b>Flowers</b>: corolla tube (7–)8–12(–13) mm, moderately to strongly constricted just below apex, often in distinct narrow band (most visible just before anthesis); stigma apiculate with 2 small lobes. <b>Follicles</b> moniliform, strongly constricted between seeds. <b>Seeds</b> light reddish brown to pale brown, fusiform with acute to rounded-acute or flat-truncate (rarely diagonally truncate) ends, mostly smooth except at ends and with a prominent longitudinal groove.</span><!--

-->{{Treatment/Body
|distribution=sw;sc United States;n Mexico.
|discussion=<p>Species 2 (2 in the flora).</p><!--
--><p>Within subg. Articularia, as many as four species, one with two varieties, have been recognized. The most recent revision (S. P. McLaughlin 1982) recognized only one species with two varieties.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Stem leaf blades linear (ligulate or very narrowly elliptic), 1.6–3.5(–5.5) mm wide, surfaces moderately to sparsely tomentose; flowers purple to magenta, maroon, or lavender (blue); New Mexico, Texas.
|[[Amsonia arenaria|Amsonia arenaria]]
|-id=key-0-1
|1
|Stem leaf blades ovate to narrowly lanceolate, narrowly to very narrowly elliptic, or elliptic, (3–)4–27 mm wide, surfaces glabrous or densely (rarely sparsely) tomentose; flowers bluish (violet- to lavender-tinged) to white (pinkish, bluish, or purple-tinged); Arizona, California, Nevada, Utah.
|[[Amsonia tomentosa|Amsonia tomentosa]]
|}
</div></div><!--

-->{{#Taxon:
name=Amsonia subg. Articularia
|authority=Woodson
|rank=subgenus
|parent rank=genus
|synonyms=
|basionyms=
|family=Apocynaceae
|distribution=sw;sc United States;n Mexico.
|reference=None
|publication title=Ann. Missouri Bot. Gard.
|publication year=1928
|special status=
|source xml=
|genus=Amsonia
|subgenus=Amsonia subg. Articularia
}}<!--

-->[[Category:Treatment]][[Category:Amsonia]]