Difference between revisions of "Ambrosia grayi"

(A. Nelson) Shinners

Field & Lab. 17: 174. 1949.

Endemic
Basionym: Gaertneria grayi A. Nelson Bot. Gaz. 34: 35. 1902,
Treatment appears in FNA Volume 21. Treatment on page 17. Mentioned on page 11.
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|publication year=1949
 
|publication year=1949
 
|special status=Endemic
 
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_21.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_21.xml
 
|tribe=Asteraceae tribe Heliantheae
 
|tribe=Asteraceae tribe Heliantheae
 
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae
 
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae

Latest revision as of 20:10, 5 November 2020

Perennials, 10–30+ cm. Stems erect. Leaves mostly alternate; petioles 10–45+ mm; blades elliptic to ovate, 45–60(–100+) × 30–45(–75+) mm, usually 1–2-pinnately lobed (lobes ± lanceolate), bases cuneate, ultimate margins serrate, abaxial faces densely sericeous or strigillose (silver or grayish), adaxial faces strigillose. Pistillate heads clustered, proximal to staminates; florets (1–)2. Staminate heads: peduncles 1–2 mm; involucres saucer-shaped, 3.5–5+ mm diam., strigillose; florets 8–25(–40+). Burs: bodies ± pyriform to globose, 3–5+ mm, stipitate-glandular, spines 8–12+, scattered, stoutly conic, 0.5–1+ mm, tips straight. 2n = 36.


Phenology: Flowering Aug–Sep.
Habitat: Wet or seasonally wet flats, depressions, alkaline, clay soils, prairies
Elevation: 600–1200 m

Distribution

V21-21-distribution-map.gif

Colo., Kans., Nebr., Okla., Tex.

Discussion

Selected References

None.

Lower Taxa

None.