Viguiera dentata |
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sunflower goldeneye, toothleaf, toothleaf goldeneye |
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Habit | 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. |
Peduncles | 3–14 cm. |
Involucres | 11–18 × 7–10 mm. |
Ray florets | 10–14; tubes 1 mm, laminae 7–15 mm. |
Disc florets | 50+; corollas 3–4 mm (staminal filaments hairy). |
Heads | usually 3–9+ in ± corymbiform arrays. |
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. |
Phyllary | apices abruptly narrowed to acuminate or spatulate (phyllary bases broad, indurate, apices herbaceous). |
Paleae | 6.5 mm, apices prominently cuspidate. |
2n | = 34. |
Viguiera dentata |
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Phenology | Flowering Jun–Oct. |
Habitat | Dry slopes and canyons, fields, roadside ditches |
Elevation | 100–2300 m (300–7500 ft) |
Distribution |
AZ; NM; TX; Mexico; Central America; West Indies (Cuba)
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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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 173. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Helianthinae > Viguiera |
Sibling taxa | |
Synonyms | Helianthus dentatus |
Name authority | (Cavanilles) Sprengel: Syst. Veg. 3: 615. (1826) |
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