Difference between revisions of "Rayjacksonia aurea"

(A. Gray) R. L. Hartman & M. A. Lane

Amer. J. Bot. 83: 369. 1996.

Common names: Houston camphor-daisy
EndemicConservation concern
Basionym: Haplopappus aureus A. Gray Mem. Amer. Acad. Arts, n. s. 4: 76. 1849 (as Aplopappus)
Synonyms: Machaeranthera aurea (A. Gray) Shinners
Treatment appears in FNA Volume 20. Treatment on page 438.
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|common_names=Houston camphor-daisy
 
|common_names=Houston camphor-daisy
|basionyms={{Treatment/ID/Synonym
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|code=C
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|label=Conservation concern
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|basionyms={{Treatment/ID/Basionym
 
|name=Haplopappus aureus
 
|name=Haplopappus aureus
 
|authority=A. Gray
 
|authority=A. Gray
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|rank=species
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|publication_title=Mem. Amer. Acad. Arts, n. s.
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|publication_place=4: 76. 1849 (as Aplopappus)
 
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}}
 
|synonyms={{Treatment/ID/Synonym
 
|synonyms={{Treatment/ID/Synonym
 
|name=Machaeranthera aurea
 
|name=Machaeranthera aurea
 
|authority=(A. Gray) Shinners
 
|authority=(A. Gray) Shinners
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|rank=species
 
}}
 
}}
 
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Rayjacksonia;Rayjacksonia aurea
 
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Rayjacksonia;Rayjacksonia aurea
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name=Rayjacksonia aurea
 
name=Rayjacksonia aurea
|author=
 
 
|authority=(A. Gray) R. L. Hartman & M. A. Lane
 
|authority=(A. Gray) R. L. Hartman & M. A. Lane
 
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|publication title=Amer. J. Bot.
 
|publication title=Amer. J. Bot.
 
|publication year=1996
 
|publication year=1996
|special status=
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|special status=Endemic;Conservation concern
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V20_1002.xml
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|tribe=Asteraceae tribe Astereae
 
|tribe=Asteraceae tribe Astereae
 
|genus=Rayjacksonia
 
|genus=Rayjacksonia

Latest revision as of 19:58, 5 November 2020

Annuals, 20–100 cm, herbaceous. Leaf blades linear to linear-oblanceolate, mid-cauline 1–3(–4) mm wide. Heads on short, sometimes bracteate peduncles, not surpassed by distal leaves. Involucres 4–7 × 10–15 mm. Phyllaries in 4–5 series, tightly appressed, strongly unequal, apices erect to slightly spreading, ca. 1 mm wide, herbaceous. Ray florets 14–19; corollas 6.5–9.5 mm. Disc florets: corolla tubes ± equaling limbs. 2n = 12.


Phenology: Flowering Oct–Nov(–Dec).
Habitat: Sand or sandy loam, fields, pastures, usually relatively bare sites
Elevation: 0–10 m

Discussion

Of conservation concern.

Rayjacksonia aurea is now restricted to a few, small populations in the vicinity of Houston. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.