View source for Drymocallis lactea

{{Treatment/ID
|accepted_name=Drymocallis lactea
|accepted_authority=(Greene) Rydberg
|publications={{Treatment/Publication
|title=in N. L. Britton et al., N. Amer. Fl.
|place=22: 369. 1908
|year=1908
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Potentilla glandulosa var. lactea
|authority=Greene
|rank=variety
|publication_title=Fl. Francisc.,
|publication_place=65. 1891
}}
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Drymocallis;Drymocallis lactea
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Rosoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Potentilleae]]</div><div class="higher-taxon"><small>genus</small>[[Drymocallis]]</div><div class="higher-taxon"><small>species</small>[[Drymocallis lactea]]</div></div>
|volume=Volume 9
|mention_page=page 283, 284, 290
|treatment_page=page 287
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Caudex </b>branches short. <b>Stems</b> tufted, (0.3–)1.5–6(–6.5) dm; base 1–2.5 mm diam., not or sparsely, sometimes moderately, septate-glandular. <b>Leaves</b> usually sparsely to moderately hairy, sometimes glabrate; basal (2–)5–20(–30) cm, leaflet pairs (2–)3–4(–5); terminal leaflet broadly obovate to cuneate, 1–4 × 0.7–3.5 cm, teeth usually single, 4–10(–14) per side, apex usually rounded to obtuse, rarely acute; cauline 1–2, reduced, leaflet pairs 2–3. <b>Inflorescences</b> (2–)5–30(–50)-flowered, not leafy, open, (1/6–)1/5–1/2(–4/5) of stem, narrow to wide, branch angles 10–40(–50)°. <b>Pedicels</b> 2–10 (proximal to 30) mm, predominantly short-hairy, sometimes velutinous, not or sparsely, sometimes moderately, septate-glandular. <b>Flowers</b> opening widely; epicalyx bractlets linear-lanceolate to narrowly elliptic, 2–5 × 0.5–1.5 mm; sepals spreading, 3–8(–9) mm, apex usually acute, sometimes obtuse and apiculate; petals ± overlapping, spreading, cream-white to bright yellow, broadly obovate, (3–)4–8(–10) × 3–8 mm, usually longer than, rarely equal to, sepals; filaments 1–3(–3.5) mm, anthers 0.6–1 mm; styles thickened, 1 mm. <b>Achenes</b> light brown, 1 mm.</span><!--

-->{{Treatment/Body
|distribution=Calif.;Nev.;Oreg.
|discussion=<p>Varieties 2 (2 in the flora).</p><!--
--><p><i>Drymocallis lactea</i> has had a well-established identity as <i>Potentilla</i> glandulosa var. (or subsp.) nevadensis; however, the epithet lactea has priority at species rank and avoids possible confusion with P. nevadensis Boissier. D. D. Keck (in J. Clausen et al. 1940) based his concept of <i>P. glandulosa</i> <i></i>subsp.<i> nevadensis</i> on white-petaled plants with narrow inflorescences, the common form in the central Sierra <i>Nevada</i> and south. His map and annotations, however, include populations with yellow petals and widely branched inflorescences from northern California and adjacent Oregon. The two extremes merge in the northern Sierra <i>Nevada</i>, and populations in the North Coast Ranges of California also are problematic; the extremes are accordingly treated here as varieties of a single species. The inclusion by Keck of Washington in the species range might have been based on specimens here assigned to P. pseudorupestris.</p><!--
--><p><i>Drymocallis lactea</i> can be distinguished from sympatric species by its relatively large, overlapping petals, non-leafy inflorescences, and singly toothed leaflets. Pedicels and distal stems are usually densely short-hairy with relatively few or no glandular hairs (in contrast to <i>D. pseudorupestris</i>), and septate glands are usually absent from stem bases (in contrast to <i>D. hansenii</i>). The distinction between <i>D. lactea</i> and <i>D. pseudorupestris</i> breaks down at the margin of the species range in <i>Nevada</i> and Oregon.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Inflorescences narrow, branch angles 10–20°; petals cream-white to pale yellowish; pedicels and stems not or sparsely septate-glandular.
|[[Drymocallis lactea var. lactea|Drymocallis lactea var. lactea]]
|-id=key-0-1
|1
|Inflorescences wide, branch angles mostly 20–40°; petals usually pale to bright yellow; pedicels and stems sometimes moderately septate-glandular.
|[[Drymocallis lactea var. austiniae|Drymocallis lactea var. austiniae]]
|}
</div></div><!--

-->{{#Taxon:
name=Drymocallis lactea
|authority=(Greene) Rydberg
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Potentilla glandulosa var. lactea
|family=Rosaceae
|distribution=Calif.;Nev.;Oreg.
|reference=None
|publication title=in N. L. Britton et al., N. Amer. Fl.
|publication year=1908
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_461.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Potentilleae
|genus=Drymocallis
|species=Drymocallis lactea
}}<!--

-->[[Category:Treatment]][[Category:Drymocallis]]