Arnoglossum ovatum

(Walter) H. Robinson

Phytologia28: 294. 1974

Synonyms: Arnoglossum ovatum lanceolatum C. elliottii C. lanceolata C. lanceolata elliottii Conophora ovata Mesadenia angustifolia Mesadenia dentata Mesadenia elliottii Mesadenia lanceolata Mesadenia lanceolata virescens Mesadenia maxima Mesadenia ovata Senecio boscianus Senecio walteri
Basionyms: Cacalia ovata
Found in FNA Volume 20. Treatment on page 624. Mentioned on page 623.
Plants 50–300 cm (weakly rhizomatous). Stems round. Basal leaves: blades ovate to narrowly lanceolate or lance-linear, to 30+ cm, margins usually entire. Cauline leaves: proximal petiolate, ovate to narrowly lanceolate or lance-linear, margins usually entire; distal sessile, smaller. Involucres 8–10 mm. Phyllaries (± purple-tinged) lance-ovate, midveins not winged (tips acute to acuminate, papillate). Corollas usually white or greenish, rarely purplish, 8–9(–10) mm. Cypselae fusiform or clavate, 4–5 mm (dark brown, 7–8-ribbed); pappi (5–)6–7.5 mm. 2n = 50, 52, 56.

Phenology: Flowering (May–)Aug–Oct(–Dec).
Habitat: Wet, sandy woods, lowlands, savannas, roadsides
Elevation: 0–300 m

Distribution

Ala., Fla., Ga., La., Miss., N.C., S.C., Tex.

Discussion

Arnoglossum ovatum is the most variable species in the genus (as implied by synonymy). Extreme forms (very narrow-leaved, e.g., Cacalia lanceolata form, and broadly ovate-leaved forms) look very distinctive; intergradations occur. Differences could be because of dysploid chromosome races, variances in habitat, or some unknown factors.

References

None.

Facts about "Arnoglossum ovatum"
AuthorLoran C. Anderson +
BasionymCacalia ovata +
Elevation0–300 m +
HabitatWet, sandy woods, lowlands, savannas, roadsides +
IllustratorYevonn Wilson-Ramsey +
PhenologyFlowering (May–)Aug–Oct(–Dec). +
ReferenceNone +
SynonymArnoglossum ovatum lanceolatum +, C. elliottii +, C. lanceolata +, C. lanceolata elliottii +, Conophora ovata +, Mesadenia angustifolia +, Mesadenia dentata +, Mesadenia elliottii +, Mesadenia lanceolata +, Mesadenia lanceolata virescens +, Mesadenia maxima +, Mesadenia ovata +, Senecio boscianus + and Senecio walteri +
Taxon nameArnoglossum ovatum +
Taxon parentArnoglossum +
Taxon rankspecies +
VolumeVolume 20 +