Eupatorium mohrii

Eupatorium mohrii
St. Joseph Peninsula State Park, Florida
Conservation status
Apparently Secure  (NatureServe) [1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Eupatorium
Species:	E. mohrii
Binomial name
Eupatorium mohrii Greene
Synonyms [2]
Eupatorium recurvansSmall Uncasia mohrii(Greene) Greene Eupatorium quinqueflorumUrb. & Ekman

Eupatorium mohrii, commonly called Mohr's thoroughwort, is a herbaceous perennial plant in the family Asteraceae native to the southeastern and south-central states of the United States, in the coastal plain from Virginia to Texas. ^[3] It has also been found in the Dominican Republic. ^[4]

Eupatorium mohrii is a perennial herb up to 100 cm (40 inches) tall and are producing tuberous rhizomes. As with other species of Eupatorium , the inflorescences contain a large number of tiny white flower heads, each with 5 disc florets but no ray florets. It forms hybrids with Eupatorium serotinum and Eupatorium rotundifolium . ^[3]

Distribution and habitat

Eupatorium mohrii is distributed from southeast Virginia south to South Florida and west to Texas. ^[5] It grows in moist areas, edges of ponds, and sandy soils, ^[3] as well as in moist pine savannas and other wet habitats. ^[5]

This species is commonly found in fire-dependent pinelands. ^[6] Its seeds can persist in the soil seed bank after a fire disturbance. ^[7]

References

1. "Eupatorium mohrii". NatureServe Explorer. NatureServe. Archived from the original on April 15, 2013. Retrieved 2010-09-12.
2. The Plant List, Eupatorium mohrii Greene
3. "Eupatorium mohrii". Flora of North America .
4. Sullivan (1983). "Eupatorium mohrii, a new record for the Dominican Republic, including E. quinqueflorum, syn. nov. (Asteraceae)". Sida. 10 (1): 37–40.
5. "Eupatorium mohrii (Mohr's Eupatorium) - FSUS". fsus.ncbg.unc.edu. Retrieved 2025-08-26.
6. Carr, Susan C.; Robertson, Kevin M.; Peet, Robert K. (2010). "A Vegetation Classification of Fire-Dependent Pinelands of Florida". Castanea. 75 (2): 153–189. doi:10.2179/09-016.1. ISSN   0008-7475.
7. Kalmbacher, Rob; Cellinese, Nicoletta; Martin, Frank (2005). "SEEDS OBTAINED BY VACUUMING THE SOIL SURFACE AFTER FIRE COMPARED WITH SOIL SEEDBANK IN A FLATWOODS PLANT COMMUNITY" . Native Plants Journal. 6 (3): 233–241. doi:10.2979/npj.2005.6.3.233. ISSN   1522-8339.