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Floristic Inventory of the Florida Keys Database Online

Ageratum houstonianum Mill.
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Ageratum houstonianum
Copyright by: Roger L. Hammer

Family: Asteraceae

Group: Dicot

Substrate: Terrestrial

Habit: Herb

Perennation: Annual

Native Range: Native to Mexico, Central America and South America; cultivated and sometimes naturalized elsewhere.

Map of select IRC data for peninsular Florida

SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Not Native, Naturalized

SOUTH FLORIDA Cultivated Status: Cultivated

Comments: For more images, click on the Atlas of Florida Vascular Plants link below.

FLORIDA KEYS Occurrence: Reported

Map of select IRC data for the Florida Keys

Florida Keys History and Distribution: Reported only for Windley Key Fossil Reef Geological State Park (Bradley, pers. obs., 2002). This could be a good record or a misidentification of Ageratum conyzoides. An herbarium voucher is needed for the Monroe County Keys.

Other data on Ageratum houstonianum available from :


Ageratum houstonianum has been reported from the following conservation area in the FLORIDA KEYS :
Occurrence Native Status
Windley Key Fossil Reef Geological State Park Present Not Native, Naturalized






All Images:

Ageratum houstonianum
Copyright by: Roger L. Hammer

Ageratum houstonianum
Copyright by: Keith A. Bradley

Ageratum houstonianum
Copyright by: Keith A. Bradley

Ageratum houstonianum
Copyright by: Keith A. Bradley