Soliva sessilis

Soliva sessilis is a plant Native to South America, but is currently an alien species in North America, Australia and many other world locations. Typical habitats that the invasive species is found include disturbed areas, compacted soils, road verges and lawns. Elevation of occurrence is generally below 1500 meters.

This species, commonly known as Field burrweed, may occur in prostrate form with a plant diameter of less than 25 cm, or in ascending form with height of two to seven cm. Stems are frequently purple-spotted or dark-colored. Leaves are pinnate, with leaflets more or less palmate. Fruits are very spiny and inflict pain when stepped upon with bare feet. This plant is considered a significant invasive species where it is found in North America, and considerable expense is given to its eradication; moreover, significant environmental impacts further arise, when chemicals are commonly used as control agents and result in water pollution from ensuing runoff.

Soliva neglecta Cabrera:
Argentina (South America)
Peru (South America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Soliva sessilis Ruiz & Pav.:
Chile (South America)
China (Asia)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Soliva pterosperma (Juss.) Less.:
Argentina (South America)
Australia (Oceania)
Brazil (South America)
Chile (South America)
New Zealand (Oceania)
Paraguay (South America)
Uruguay (South America)
United States (North America)
South Africa (Africa & Madagascar)
Mexico (Mesoamerica)
China (Asia)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Soliva daucifolia Nutt.:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Canada

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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.

Soliva daucifolia Nuttall; S. pterosperma (Jussieu) Lessing

The following is a representative barcode sequence, the centroid of all available sequences for this species.

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1

Canada

Rounded National Status Rank: NNA - Not Applicable

United States

Rounded National Status Rank: NNA - Not Applicable

Rounded Global Status Rank: GNR - Not Yet Ranked