Galinsoga parviflora var. semicalva
Smithsonian Contr. Knowl. 5(6): 98. 1853.
Synonyms: Galinsoga semicalva (A. Gray) H. St. John & D. White
Treatment appears in FNA Volume 21. Treatment on page 181.
Plants 4–35 cm. Leaf blades lanceolate to ovate, 7–55(–80) × 3–20 mm, margins usually entire or serrulate, sometimes serrate. Arrays of heads congested. Axillary peduncles shorter than subtending bractlets. 2n = 32.
Phenology: Flowering summer–fall.
Habitat: Rocky slopes
Elevation: 1800–2700 m
Distribution
Ariz., N.Mex., Tex., Mexico.
Discussion
Plants of var. semicalva are less branched and usually have narrower leaves and shorter axillary peduncles than those of var. parviflora. They are found above 1500 m as far south as Distrito Federal, Mexico. Morphologic intermediates between the diploid var. parviflora and the tetraploid var. semicalva occur throughout the range of var. semicalva.
Selected References
None.
Lower Taxa
None.