View source for Calystegia spithamaea

{{Treatment/ID
|accepted_name=Calystegia spithamaea
|accepted_authority=(Linnaeus) Pursh
|publications={{Treatment/Publication
|title=Fl. Amer. Sept.
|place=1: 143. 1813
|year=1813
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Convolvulus spithamaeus
|authority=Linnaeus
|rank=species
|publication_title=Sp. Pl.
|publication_place=1: 158.  1753
}}
|synonyms=
|hierarchy=Convolvulaceae;Calystegia;Calystegia spithamaea
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Convolvulaceae]]</div><div class="higher-taxon"><small>genus</small>[[Calystegia]]</div><div class="higher-taxon"><small>species</small>[[Calystegia spithamaea]]</div></div>
|volume=Volume 14
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> rhizomatous. <b>Herb</b>age glabrate or tomentose, hairs sometimes whitish. <b>Stems</b> erect, 10–35(–50) cm. <b>Leaves</b>: blade narrowly to broadly elliptic, to 80 × 35 mm, base cuneate, rounded, or lobed, lobes rounded or ± 1-pointed, to 11 mm. <b>Bracts</b> immediately subtending sepals, lance-ovate, oblong, or oval, (13–)16–25(–29) × 8–14(–20) mm, proximally flat or ± keeled, apex acute to obtuse, closely enfolding sepals. <b>Flowers</b>: sepals 12–17 mm; corolla white, 35–63(–67) mm.</span><!--

-->{{Treatment/Body
|distribution=c;e North America.
|discussion=<p>Subspecies 3 (3 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Habit ± lax; herbage glabrate to pubescent; leaf blades ultimately ± flat.
|[[Calystegia spithamaea subsp. spithamaea|Calystegia spithamaea subsp. spithamaea]]
|-id=key-0-1
|1
|Habit ± compact; herbage tomentose, hairs sometimes whitish; leaf blades ± conduplicate.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Leaf blade bases usually lobed, lobes to 5(–6) mm, sometimes cuneate; corollas (38–)43–59(–64) mm; plants (10–)15–35(–40 cm).
|[[Calystegia spithamaea subsp. stans|Calystegia spithamaea subsp. stans]]
|-id=key-0-2
|2
|Leaf blade bases lobed, lobes 4–11 mm; corollas 35–47(–53) mm; plants (15–)25–35(–40) cm.
|[[Calystegia spithamaea subsp. purshiana|Calystegia spithamaea subsp. purshiana]]
|}
</div></div><!--

-->{{#Taxon:
name=Calystegia spithamaea
|authority=(Linnaeus) Pursh
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Convolvulus spithamaeus
|family=Convolvulaceae
|distribution=c;e North America.
|reference=None
|publication title=Fl. Amer. Sept.
|publication year=1813
|special status=Illustrated;Endemic
|source xml=
|genus=Calystegia
|species=Calystegia spithamaea
}}<!--

-->[[Category:Treatment]][[Category:Calystegia]]