Soliva sessilis

Ruiz & Pavón

Syst. Veg. Fl. Peruv. Chil., 113, plate 24. 1798.

Common names: Field burrweed lawn burweed
IntroducedIllustrated
Synonyms: Soliva daucifolia Nuttall Soliva pterosperma (Jussieu) Lessing
Treatment appears in FNA Volume 19. Treatment on page 546.

Plants (1–) 2–5 (–25+) cm (high or across), ± villous, glabrescent (not stoloniferous, stems purplish, prostrate to ascending, often rooting at nodes). Leaves basal and cauline; blades ± oblanceolate, 1–2 (–3) + cm, 2 (–3) -pinnati-palmately lobed. Heads mostly scattered along stems. Involucres 2–4 (–5) mm diam. Pistillate florets 5–8 (–17+) in 1–2+ series. Disc-florets 4–8+; corollas 1.5–2.5 mm. Cypselae: bodies ± obovate to lanceolate, (1.5–) 2.5–3+ mm, usually winged (wings entire or ± sinuate to incised, each shoulder usually distally-projecting as spinelike tooth), faces glabrous or ± scabrellous to hirtellous; pappi 0 (persistent stylar sheaths indurate, spinelike, 1–2+ mm, erect or slightly inflexed). 2n = ca. 92 (as S. pterosperma), 110+ (from Portugal), 118–120.


Phenology: Flowering Mar–Jun(–Dec).
Habitat: Disturbed sites, lawns, roadsides
Elevation: 0–600 m

Distribution

V19-950-distribution-map.gif

Introduced; B.C., Ala., Ark., Calif., Fla., Ga., La., Miss., N.C., Okla., Oreg., S.C., Tex., Va., Wash., South America, also in Europe

Discussion

Selected References

None.

Lower Taxa

None.

"broader" is not a number.

... more about "Soliva sessilis"
118 +  and 120 +
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Linda E. Watson +
Ruiz & Pavón +
decurrent +
compound +  and simple +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lobed;oblanceolate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
less obovate;lanceolate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Field burrweed +  and lawn burweed +
zygomorphic +, actinomorphic +  and (3-)5-merous +
whitish +  and yellowish +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
less obovate +  and oblanceolate or oblong-cuneate obcompressed or flattened +
fertile +  and bisexual +
B.C. +, Ala. +, Ark. +, Calif. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, Okla. +, Oreg. +, S.C. +, Tex. +, Va. +, Wash. +, South America +  and also in Europe +
0–600 m +
hirtellous +  and glabrous +
scabrellous +
winged +  and beaked +
dispersed +
Disturbed sites, lawns, roadsides +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
hemispheric +
petiolate +  and sessile +
cauline +  and basal +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
Flowering Mar–Jun(–Dec). +
Syst. Veg. Fl. Peruv. Chil., +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
flat;hemispheric or conic +
exalbuminous +
Introduced +  and Illustrated +
branched +  and simple +
1 +  and 5 +
appendaged +  and truncate +
papillate +
Soliva daucifolia +  and Soliva pterosperma +
Soliva sessilis +
species +
campanulate +
cylindric +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
glabrescent +  and villous +