Ambrosia chamissonis

(Lessing) Greene

Man. Bot. San Francisco, 188. 1894.

Basionyms: Franseria chamissonis Lessing Linnaea 6: 507. 1831
Synonyms: Franseria chamissonis subsp. bipinnatisecta (Lessing) Wiggins & Stockwell A. chamissonis var. bipinnatisecta (Lessing) J. T. Howell
Treatment appears in FNA Volume 21. Treatment on page 16. Mentioned on page 11.

Perennials, 50–150 (–350+) cm. Stems prostrate or decumbent. Leaves mostly alternate; petioles 15–30 (–45+) mm; blades rounded-deltate to ovate or obovate, 20–45 (–70+) × 10–25 (–50+) mm overall, not lobed or 1–2 (–3) -pinnately lobed, bases cuneate, ultimate margins entire or toothed, abaxial and adaxial faces strigillose to sericeous. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 0.5–2 mm; involucres shallowly cupshaped, 4–6+ mm diam., strigillose; florets 8–25 (–50). Burs: bodies fusiform to ± pyriform, 4–7+ mm, ± strigillose to pilosulous, spines 8–16+, scattered, stoutly conic or flattened to triquetrous-subulate, 0.5–1.5+ mm, tips straight. 2n = 36.


Phenology: Flowering Apr–Nov.
Habitat: Sandy beaches and strand
Elevation: 0–10 m

Distribution

V21-18-distribution-map.gif

B.C., Alaska, Calif., Oreg., Wash., Mexico (Baja California)

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Ambrosia chamissonis"
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 +
(Lessing) Greene +
cuneate +
Franseria chamissonis +
compound +  and simple +
4.5 cm45 mm <br />0.045 m <br /> (7 cm70 mm <br />0.07 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
lobed;not lobed;rounded-deltate;ovate or obovate +
10mm;25mm +
winged;ribbed;winged;ribbed +
less strigillose +  and pilosulous +
tuberculate +  and rugose +
fusiform;more or less pyriform +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 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 +
B.C. +, Alaska +, Calif. +, Oreg. +, Wash. +  and Mexico (Baja California) +
0–10 m +
stipitate-glandular +, glabrate +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy beaches and strand +
staminate +  and pistillate +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
membranous +  and scarious +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
cup-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 +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Apr–Nov. +
5 +  and 16 +
unequal +  and subequal +
Man. Bot. San Francisco, +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
8 (?) +  and 16 (?) +
flattened +  and triquetrous-subulate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
decumbent +  and prostrate +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Franseria chamissonis subsp. bipinnatisecta +  and A. chamissonis var. bipinnatisecta +
Ambrosia chamissonis +
Ambrosia +
species +
campanulate +  and cylindric +
straight +
toothed +  and entire +
150 cm1,500 mm <br />1.5 m <br /> (350 cm3,500 mm <br />3.5 m <br />) +
50 cm500 mm <br />0.5 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +