View source for Asclepias cordifolia

{{Treatment/ID
|accepted_name=Asclepias cordifolia
|accepted_authority=(Bentham) Jepson
|publications={{Treatment/Publication
|title=Fl. W. Calif.,
|place=384. 1901
|year=1901
}}
|common_names=Purple or heart-leaf milkweed
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Acerates cordifolia
|authority=Bentham
|rank=species
|publication_title=Pl. Hartw.,
|publication_place=323.  1849
}}
|synonyms={{Treatment/ID/Synonym
|name=Gomphocarpus cordifolius
|authority=(Bentham) Bentham ex A. Gray
|rank=species
}}
|hierarchy=Apocynaceae;Asclepias;Asclepias cordifolia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Apocynaceae]]</div><div class="higher-taxon"><small>genus</small>[[Asclepias]]</div><div class="higher-taxon"><small>species</small>[[Asclepias cordifolia]]</div></div>
|volume=Volume 14
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs.</b> Stems 1–20, ascending to spreading, unbranched, 25–100 cm, glabrous, glaucous, rhizomes absent. <b>Leaves</b> opposite, sessile, stipular colleters absent; blade ovate to lanceolate, 3.5–11 × 1.8–8 cm, chartaceous, base cordate, clasping, margins entire, apex acute, mucronate, venation brochidodromous to eucamptodromous, surfaces glabrous, glaucous, margins minutely ciliate, laminar colleters absent. <b>Inflorescences</b> terminal, branched, sometimes also extra-axillary at upper nodes, pedunculate, 5–20-flowered; peduncle 0.3–6.5 cm, apically sparsely pilose to glabrate, with few bracts. <b>Pedicels</b> 16–37 mm, sparsely pilose. <b>Flowers</b> erect to pendent; calyx lobes elliptic to lanceolate, 3–5 mm, apex acute, pilose; corolla red-violet, lobes reflexed with spreading tips, oval, 6–7 mm, apex acute, glabrous; gynostegial column 1–1.5 mm; fused anthers brown, cylindric, 1.5–2 mm, wings right-triangular, open at tip, apical appendages deltoid; corona segments white, tinged pink to red-violet at base, sessile, tubular, 2–3 mm, exceeded by style apex, base saccate, apex truncate, oblique, glabrous, internal appendage absent; style apex shallowly depressed, pink to red-violet. <b>Follicles</b> erect on upcurved pedicels, lance-ovoid, 7.5–10.5 × 1.5–1.8 cm, apex long-acuminate, smooth, glabrous, glaucous. <b>Seeds</b> ovate, 8–9 × 5–7 mm, margin not winged, faces reticulate-rugulose; coma 3–3.5 cm. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Jul(–Aug); fruiting Jun–Sep.
|habitat=Hillsides, canyons, ridge tops, streamsides, seeps, basalt, serpentine, gabbro, granite, shale, limestone, talus slopes, gravel, alluvium, oak woodlands, mixed evergreen, douglas-fir, pine, pine-oak, and riparian forests, chaparral, timberline meadows, grasslands.
|elevation=50–2200(–2800) m.
|distribution=Calif.;Nev.;Oreg.
|discussion=<p>Fresh leaves and stems of Asclepias cordifolia are often slightly or strongly colored bluish, grayish, or purplish. This is one of the few American species of Asclepias with cavitate corona segments that lack adaxial appendages. Such species were segregated along with diverse African species in Gomphocarpus R. Brown, a polyphyletic segregate (M. Fishbein et al. 2011; D. Chuba et al. 2017). Asclepias cordifolia is a distinctive species unlike any other within its range. It is phylogenetically and geographically isolated, although not highly derived morphologically. In Nevada, A. cordifolia is restricted to the Sierra Nevada, in Carson City, Douglas, and Washoe counties. Its range extends to northern California and southwestern Oregon.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Asclepias cordifolia
|authority=(Bentham) Jepson
|rank=species
|parent rank=genus
|synonyms=Gomphocarpus cordifolius
|basionyms=Acerates cordifolia
|family=Apocynaceae
|phenology=Flowering Mar–Jul(–Aug); fruiting Jun–Sep.
|habitat=Hillsides, canyons, ridge tops, streamsides, seeps, basalt, serpentine, gabbro, granite, shale, limestone, talus slopes, gravel, alluvium, oak woodlands, mixed evergreen, douglas-fir, pine, pine-oak, and riparian forests, chaparral, timberline meadows, grasslands.
|elevation=50–2200(–2800) m.
|distribution=Calif.;Nev.;Oreg.
|reference=None
|publication title=Fl. W. Calif.,
|publication year=1901
|special status=Illustrated;Endemic
|source xml=
|genus=Asclepias
|species=Asclepias cordifolia
}}<!--

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