Flora of North America species comparison

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Soliva sessilis

Soliva anthemifolia

carpet burrweed, carpet burweed, common soliva, field burrweed, lawn burrweed, lawn burweed, prickly soliva, South American soliva

button burrweed
Habit Plants (1–)2–5(–25+) cm (high or across), ± villous, glabrescent (not stoloniferous, stems purplish, prostrate to ascending, often rooting at nodes). Plants mostly 3–15(–30+) cm (high or across), ± villous, glabrescent (sometimes stoloniferous, ± mat-forming).
Leaves

basal and cauline;

blades ± oblanceolate, 1–2(–3)+ cm, 2(–3)-pinnati-palmately lobed.

mostly basal;

blades ± obovate to spatulate, 3–8(–15) cm, 2–3-pinnati-palmately lobed.
Involucres

2–4(–5) mm diam.

4–8+ mm diam.
Pistillate florets

5–8(–17+) in 1–2+ series.

(20–)50–100+ in 1–8+ series.
Disc florets

4–8+;

corollas 1.5–2.5 mm.

2–4+;

corollas 1.5–2 mm.
Heads

mostly scattered along stems.

mostly clustered in leaf axils (at ground level), rarely scattered along stems.
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).

bodies oblanceolate to cuneate-oblong, 1.5–2+ mm, wings transversely rugulose or ribbed on proximal 2/3, shoulders not spinose laterally, faces distally villous to pilose, sometimes glabrescent;

pappi 0 (persistent stylar sheaths indurate, spinelike, 1.5–3 mm, usually inflexed).
2n

= ca. 92 (as S. pterosperma), 110+ (from Portugal), 118–120.

= 118 (Punjab).

Soliva sessilis

Soliva anthemifolia
Phenology Flowering Mar–Jun(–Dec). Flowering Mar–May(–Aug).
Habitat Disturbed sites, lawns, roadsides Disturbed sites
Elevation 0–600 m (0–2000 ft) 10–100+ m (0–300+ ft)
Distribution
from FNA
AL; AR; CA; FL; GA; LA; MS; NC; OK; OR; SC; TX; VA; WA; BC; South America [Introduced in North America; introduced also in Europe]
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; FL; LA; TX; South America [Introduced in North America; introduced also in Mexico, Asia, Australia]
[BONAP county map]
Source FNA vol. 19, p. 546. FNA vol. 19, p. 546.
Parent taxa Asteraceae > tribe Anthemideae > Soliva Asteraceae > tribe Anthemideae > Soliva
Sibling taxa
S. anthemifolia, S. stolonifera
S. sessilis, S. stolonifera
Synonyms S. daucifolia, S. pterosperma Gymnostyles anthemifolia, S. mutisii
Name authority Ruiz & Pavón: Syst. Veg. Fl. Peruv. Chil., 113, plate 24. (1798) (Jussieu) Sweet: Hort. Brit., 243. (1826)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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