Difference between revisions of "Parthenium alpinum"
Fl. N. Amer. 2: 285. 1842.
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| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Bolophyta alpina | |name=Bolophyta alpina | ||
|authority=Nuttall | |authority=Nuttall | ||
| + | |publication_title=Trans. Amer. Philos. Soc., n. s. | ||
| + | |publication_place=7: 348. 1840 | ||
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|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
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|publication year=1842 | |publication year=1842 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_31.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | ||
Revision as of 18:48, 24 September 2019
Perennials, 1–2 cm (underground caudices 2–5+ cm, branched; plants cespitose or forming mats). Leaf blades oblanceolate to spatulate, 6–18(–35) × 1–3(–4+) mm, margins entire, faces strigilloso-sericeous (gray) and obscurely gland-dotted. Heads ± disciform, borne singly. Peduncles 0–5(–30) mm. Phyllaries: outer 5–8 ± linear, 4 mm, inner 5–8 ± orbiculate, 4–5 mm. Pistillate florets 5–8; corolla laminae 0 (tubes ± compressed, obscurely 2–4-lobed). Disc florets 18–28+. Cypselae oblanceoloid, 4 mm (narrowly winged); pappus-like enations 2, erect to spreading, ± subulate, 0.5–1 mm (a third, ± subulate element sometimes at apex of adaxial face). 2n = 36.
Phenology: Flowering May–Jul.
Habitat: Shale and calcareous outcrops, red clays
Elevation: 1300–1700 m
Distribution
Colo., N.Mex., Wyo.
Discussion
Parthenium alpinum is in the Center for Plant Conservation’s National Collection of Endangered Plants.
Selected References
None.