View source for Asclepias eastwoodiana

{{Treatment/ID
|accepted_name=Asclepias eastwoodiana
|accepted_authority=Barneby
|publications={{Treatment/Publication
|title=Leafl. W. Bot.
|place=4: 210. 1945
|year=1945
}}
|common_names=Eastwood’s milkweed
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Apocynaceae;Asclepias;Asclepias eastwoodiana
|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 eastwoodiana]]</div></div>
|volume=Volume 14
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs.</b> Stems 1–6, ascending to decumbent, unbranched or branched near base, 6–30 cm, puberulent with curved trichomes, not glaucous, rhizomatous. <b>Leaves</b> proximally opposite, distally alternate, petiolate, with 0 or 1 stipular colleter on either side of petiole; petiole 2–10 mm, puberulent with curved trichomes; blade narrowly lanceolate to ovate, 2–4.5 × 0.6–3 cm, chartaceous, base cuneate to obtuse, margins entire, apex acute, mucronate, venation eucamptodromous, surfaces strigulose or pilosulous on midvein to glabrate, margins densely ciliate, laminar colleters absent. <b>Inflo</b>rescences terminal and extra-axillary at upper nodes, sessile or pedunculate, 2–25-flowered; peduncle 0–4 cm, puberulent with curved trichomes to glabrate, bracts few. <b>Pedicels</b> 10–28 mm, pilosulous to puberulent with curved trichomes. <b>Flowers</b> erect; calyx lobes elliptic to lanceolate, 2–2.5 mm, apex acute, puberulent with curved trichomes to pilosulous; corolla red-violet, faintly striate, lobes reflexed with spreading tips, oval, 4–5 mm, apex acute, glabrous; gynostegial column 0.2–0.5 mm; fused anthers brown, cylindric, 1.5–2 mm, wings right-triangular, apical appendages ovate; corona segments red-violet dorsally, white proximally, sessile, cupulate, 1.5–2 mm, slightly exceeded by style apex, apex truncate with a proximal tooth on each side, glabrous, internal appendage conical, barely exserted from cavity, glabrous; style apex shallowly depressed, pink to red-violet. <b>Follicles</b> spreading to pendulous on spreading pedicels, lance-ovoid, 3.5–6 × 0.5–1 cm, apex acuminate, smooth, faintly striate, strigose. <b>Seeds</b> not seen.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Jun; fruiting Jun.
|habitat=Valleys, depressions, flats, slopes, arroyos, dunes, granite, gravel, sandy, calcareous, and clay soils, shrubby grasslands, desert scrub, pinyon-juniper woodlands.
|elevation=1400–2200 m.
|distribution=Nev.
|discussion=<p>Asclepias eastwoodiana and the next three species (A. ruthiae, A. sanjuanensis, A. uncialis) form a complex of largely allopatric entities that have sometimes been united in a single species, for which the name A. uncialis holds priority (for example, E. Sundell 1994). However, each entity shows genetic, chemical, and subtle morphological distinctions, supporting recognition at the specific rank (M. B. Sady and J. N. Seibert 1991; J. P. Riser et al. 2019). Asclepias eastwoodiana is distinguished from the others by the differences in leaf shape, vestiture, and corona morphology indicated in the key. With A. ruthiae it shares a spreading to pendulous fruit that differs from the typically erect fruits of A. sanjuanensis and A. uncialis. Asclepias eastwoodiana is endemic to valleys in central Nevada (Esmeralda, Lander, Lincoln, Mineral, and Nye counties), where it is considered to be a species of conservation concern, potentially threatened by livestock trampling and mining development.</p>
|tables=
|references=
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-->{{#Taxon:
name=Asclepias eastwoodiana
|authority=Barneby
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Apocynaceae
|phenology=Flowering May–Jun; fruiting Jun.
|habitat=Valleys, depressions, flats, slopes, arroyos, dunes, granite, gravel, sandy, calcareous, and clay soils, shrubby grasslands, desert scrub, pinyon-juniper woodlands.
|elevation=1400–2200 m.
|distribution=Nev.
|reference=None
|publication title=Leafl. W. Bot.
|publication year=1945
|special status=Endemic
|source xml=
|genus=Asclepias
|species=Asclepias eastwoodiana
}}<!--

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