View source for Rhodiola

{{Treatment/ID
|accepted_name=Rhodiola
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 1035. 1753
|year=1753
}}{{Treatment/Publication
|title=Gen. Pl. ed.
|place=5, 457. 1754 ,
}}
|common_names=Roseroot
|basionyms=
|synonyms=
|hierarchy=Crassulaceae;Rhodiola
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Crassulaceae]]</div><div class="higher-taxon"><small>genus</small>[[Rhodiola]]</div></div>
|etymology=Greek rhodon, rose, alluding to odor of rootstock in R. rosea
|volume=Volume 8
|mention_page=page 147, 149
|treatment_page=page 164
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial (dying back in winter to rootstock), not viviparous, 0.3–6 dm, glabrous [pubescent]. <b>Stems</b> a rootstock with apex mostly above ground, erect, spreading, or decumbent, commonly branching to form clumps, fleshy, with brown scalelike [or green] leaves; flowering stems from axils of brown scale-leaves on stout rootstock partly above ground. <b>Leaves</b> persistent, cauline, alternate, sessile, subclasping basally; blade elliptic to ovate or oblanceolate to linear, obovate, or oblong, laminar (mostly to 1 mm thick), 0.5–5.5 cm, somewhat fleshy, base not spurred, margins entire or toothed; veins not conspicuous. <b>Inflorescences</b> cymose or spikelike to subcapitate. <b>Flowers</b> bisexual or unisexual, erect, 4–6-merous; sepals connate basally, all alike (unequal in <i>R. rosea</i>); petals erect or spreading, distinct, greenish, white, rose, dark red, or yellowish; calyx and corolla not circumscissile in fruit; nectaries quadrate to linear; stamens 2 times as many as sepals, epipetalous; filaments mostly adnate to corolla at base; pistils erect, nearly distinct; ovary base straight; styles 2+ times shorter than ovary. <b>Fruits</b> erect. <b>Seeds</b> oblanceoloid or pyriform, ribbed, finely cross-ribbed.</span><!--

-->{{Treatment/Body
|distribution=North America;Eurasia;montane to arctic areas.
|discussion=<p>Species ca. 40 (3 in the flora).</p><!--
--><p>In <i>Rhodiola</i>, inflorescences are borne in axils of scale leaves on the rootstocks, which are partly above ground. They are thinner and leafier than those of <i>Hylotelephium</i>. This treatment largely follows R. T. Clausen (1975), except that he made <i>Rhodiola</i> a subgenus of <i>Sedum</i>.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Inflorescences spikelike or subcapitate, 1-3.5 cm diam.; flowers bisexual; petals greenish or white to rose, 6-13 mm, longer than stamens; beaks of follicles erect.
|[[Rhodiola rhodantha|Rhodiola rhodantha]]
|-id=key-0-1
|1
|Inflorescences corymbose cymes, to 8 cm diam.; flowers mostly unisexual (and plants mostly dioecious); petals yellow to greenish yellow and sometimes red at tips, or dark red and sometimes yellow basally and red apically, 1-5 mm, shorter than stamens; beaks of follicles spreading
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Petals mostly dark red, sometimes yellowish at base or yellow with apical 1/3 red, in staminate flowers 1.3-1.7 mm wide; leaf blades commonly bright green, sometimes glaucous.
|[[Rhodiola integrifolia|Rhodiola integrifolia]]
|-id=key-0-2
|2
|Petals pale yellow to greenish yellow, sometimes red at tips, in staminate flowers 0.7-1.1 mm wide; leaf blades pale green, usually glaucous.
|[[Rhodiola rosea|Rhodiola rosea]]
|}
</div></div><!--

-->{{#Taxon:
name=Rhodiola
|author=Reid V. Moran
|authority=Linnaeus
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Crassulaceae
|distribution=North America;Eurasia;montane to arctic areas.
|reference=None
|publication title=Sp. Pl.;Gen. Pl. ed.
|publication year=1753;
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V8/V8_329.xml
|genus=Rhodiola
}}<!--

-->[[Category:Treatment]][[Category:Crassulaceae]]