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.

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.
... more about "Ambrosia grayi"
strigillose +  and sericeous +
not tailed +, rounded +  and obtuse +
coherent +  and distinct +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +, glomerate +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
(A. Nelson) Shinners +
cuneate +
Gaertneria grayi +
compound +  and simple +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (6 cm60 mm <br />0.06 m <br />) +
lobed;elliptic;ovate +
30mm;45mm +
winged;ribbed;winged;ribbed +
stipitate-glandular +
tuberculate +  and rugose +
less pyriform;globose +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
barbellulate +  and barbellate +
purplish +  and whitish +
villous +, strigillose +, hispidulous +, glabrous +  and warty +
tuberculate +
globose +  and obovoid pyramidal pyriform obconic or fusiform +
fertile +  and bisexual +
Colo. +, Kans. +, Nebr. +, Okla. +  and Tex. +
600–1200 m +
stipitate-glandular +, glabrate +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Wet or seasonally wet flats, depressions, alkaline, clay soils, prairies +
staminate +  and pistillate +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
membranous +  and scarious +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
saucer--shaped +
conspicuous +
petiolate +  and sessile +
incurved;erect +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
2-carpellate +
stipitate-glandular +, hirtellous +  and villous +
spatulate;linear +
membranous +
persistent +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Flowering Aug–Sep. +
5 +  and 16 +
unequal +  and subequal +
Field & Lab. +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
8 (?) +  and 12 (?) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
prostrate +  and decumbent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Franseria +  and Hymenoclea +
Ambrosia grayi +
Ambrosia +
species +
campanulate +  and cylindric +
straight +
toothed +  and entire +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +