Viguiera dentata

(Cavanilles) Sprengel

Syst. Veg. 3: 615. 1826.

Common names: Sunflower goldeneye toothleaf
Basionym: Helianthus dentatus Cavanilles Icon. 3: 10, plate 220. 1795
Treatment appears in FNA Volume 21. Treatment on page 173.

Perennials, 100–200 cm. Leaves opposite (proximal) or alternate (distal); petioles 10–55 mm; blades ovate or rhombic-ovate to lance-ovate or lanceolate, 3.5–12.5 × 1–8 cm, margins serrate or serrulate, faces strigose. Heads usually 3–9+ in ± corymbiform arrays. Peduncles 3–14 cm. Involucres 11–18 × 7–10 mm. Phyllary apices abruptly narrowed to acuminate or spatulate (phyllary bases broad, indurate, apices herbaceous). Paleae 6.5 mm, apices prominently cuspidate. Ray florets 10–14; tubes 1 mm, laminae 7–15 mm. Disc florets 50+; corollas 3–4 mm (staminal filaments hairy). Cypselae 3.5–3.8 mm, ± strigose; pappi of 2 lacerate, aristate scales 2.2–2.8 mm plus 2–4 lacerate scales 0.5–0.7 mm. 2n = 34.


Phenology: Flowering Jun–Oct.
Habitat: Dry slopes and canyons, fields, roadside ditches
Elevation: 100–2300 m

Distribution

V21-424-distribution-map.gif

Ariz., N.Mex., Tex., Mexico, West Indies (Cuba), Central America.

Discussion

Viguiera dentata is widespread and variable. It is unique in Helianthinae in the hairy staminal filaments. The name V. dentata var. lancifolia S. F. Blake has been used for plants from Mexico.

Selected References

None.

Lower Taxa

None.
... more about "Viguiera dentata"
Edward E. Schilling +
(Cavanilles) Sprengel +
Helianthus dentatus +
Sunflower goldeneye +  and toothleaf +
Ariz. +, N.Mex. +, Tex. +, Mexico +, West Indies (Cuba) +  and Central America. +
100–2300 m +
Dry slopes and canyons, fields, roadside ditches +
Flowering Jun–Oct. +
Undefined (tribe Undefined) subtribe Lagasceinae +
Viguiera dentata +
Viguiera +
species +