Oclemena
Oclemena is a genus of flowering plants in the aster family (Asteraceae). It is native to North America, primarily found in the eastern and central United States and Canada. Plants in this genus are generally perennial herbs.
Description
Oclemena species are characterized by their lance-shaped leaves, which are often toothed. They typically produce clusters of small, daisy-like flowers with white or slightly pinkish rays surrounding a yellow disc. The overall appearance is similar to that of some other asters, which has historically led to taxonomic confusion.
Taxonomy
The genus Oclemena has been subject to taxonomic revision. Historically, species now classified as Oclemena were often included within the larger genus Aster. Phylogenetic studies, using molecular data, have supported the segregation of Oclemena as a distinct genus. This reclassification reflects a better understanding of the evolutionary relationships among these plants.
Species
Recognized species within the genus Oclemena include:
- Oclemena acuminata (Whorled Wood Aster)
- Oclemena × blakei
- Oclemena nemoralis (Bog Aster)
- Oclemena reticulata
- Oclemena sericocarpoides
Ecology
Oclemena species are often found in woodland habitats, meadows, and along stream banks. They play a role in supporting pollinators such as bees and butterflies. They are generally adapted to moist soil conditions.
Conservation
The conservation status of individual Oclemena species varies. Some species are relatively common, while others may be rare or threatened in specific regions due to habitat loss or other environmental factors.