Difference between revisions of "Ambrosia psilostachya"
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 526. 1836.
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|name=Ambrosia psilostachya var. californica | |name=Ambrosia psilostachya var. californica | ||
|authority=(Rydberg) S. F. Blake | |authority=(Rydberg) S. F. Blake | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Ambrosia psilostachya var. coronopifolia | |name=Ambrosia psilostachya var. coronopifolia | ||
|authority=(Torrey & A. Gray) Farwell | |authority=(Torrey & A. Gray) Farwell | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Ambrosia psilostachya var. lindheimeriana | |name=Ambrosia psilostachya var. lindheimeriana | ||
|authority=(Scheele) Blankinship | |authority=(Scheele) Blankinship | ||
+ | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Ambrosia rugelii | |name=Ambrosia rugelii | ||
− | |authority= | + | |authority= |
+ | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ambrosiinae;Ambrosia;Ambrosia psilostachya | |hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ambrosiinae;Ambrosia;Ambrosia psilostachya | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Ambrosia psilostachya | name=Ambrosia psilostachya | ||
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|authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle | |authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle | ||
|rank=species | |rank=species | ||
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|publication year=1836 | |publication year=1836 | ||
|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/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V21_25.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae |
Revision as of 20:35, 16 December 2019
Perennials, 10–60(–100+) cm. Stems erect. Leaves proximally opposite, distally alternate; petioles 0–25 mm (often ± winged); blades deltate to lanceolate, 20–60(–140) × 8–35(–50+) mm, pinnately toothed to 1-pinnately lobed, bases cuneate to truncate, ultimate margins entire or toothed, abaxial and adaxial faces hirsutulous to strigose and gland-dotted. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 0.5–2 mm; involucres obliquely cup-shaped, 2–4(–5) mm diam., hirsutulous; florets 5–15(–30+). Burs: bodies ± obpyramidal to globose, 2–3 mm, hirsutulous, spines or tubercles 0 or 1–6, mostly distal, stoutly conic to acerose, (0.1–)0.5–1 mm, tips straight. 2n = 18, 27, 36, 45, 54, 63, 72, 100–104, 108, 144.
Phenology: Flowering Jul–Oct(–Dec).
Habitat: Disturbed sites, often wet, alkaline, clay soils
Elevation: 0–2200 m
Distribution
![V21-25-distribution-map.gif](/w/images/3/39/V21-25-distribution-map.gif)
Alta., B.C., Man., N.S., Ont., P.E.I., Que., Sask., Ala., Ariz., Ark., Calif., Colo., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., La., Maine, Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., S.C., S.Dak., Tenn., Tex., Utah, Vt., Wash., Wis., Wyo., Mexico (Baja California, Chihuahua, Coahuila).
Discussion
Hybrids between Ambrosia psilostachya and A. artemisiifolia have been called A. ×intergradiens W. H. Wagner. Some botanists consider the type of A. cumanensis Kunth (1818) to be conspecific with that of A. psilostachya.
Selected References
None.