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Cenchrus brownii Roem. & Schult.
Slimbristle sandbur

Cenchrus brownii

Family: Poaceae

Group: Monocot

Substrate: Terrestrial

Habit: Herb

Perennation: Annual

Native Range: South Florida, the West Indies, Mexico, Central America, and South America; naturalized elsewhere.

Map of select IRC data for peninsular Florida

Florida Natural Areas Inventory State Status: Presumed Extirpated or Extinct

IRC SOUTH FLORIDA Status: Presumed Extirpated or Extinct in the Wild

SOUTH FLORIDA Occurrence: Presumed Extirpated

SOUTH FLORIDA Native Status: Native

South Florida History and Distribution: Ranked as presumed extirpated in Rare Plants of South Florida (Gann et al. 2002, pp 67-68), based on numerous collections between 1846 and 1930 in the Florida Keys, and a single, possibly introducted population vouchered in Miami-Dade County on the mainland in 1963. A 2010 specimen collected on Key Largo (Bradley 2713 FTG) does not match the key characters and is likely Cenchus echinatus.

SOUTH FLORIDA Cultivated Status: Not Cultivated

Comments: The spikelet of this species most closely resembles that of Cenchrus echinatus, with the spines in two series, the inner flatenned and the outer rounded and forming a ring at the base. It differs in that the mature bur is smaller, 2.7-4.2 mm wide excluding the spines, and 4-5.3 mm long, versus 4.1-6.3 mm wide and 5.3-8 mm long. Click here for an excellent image of Cenchrus brownii collected in Panama. For an image of the bur from a live plant, click on the USDA PLANTS link below.

Synonyms: C. viridis.

Other data on Cenchrus brownii available from :

Cenchrus brownii has been found in the following conservation area :
Occurrence Native Status
Biscayne National Park Reported

Cenchrus brownii has been found in the following 2 counties :
Occurrence Native Status
Miami-Dade County Presumed Extirpated Not Native, Naturalized
Monroe County (Keys) Presumed Extirpated Presumed Extirpated

Cenchrus brownii has been found in the following 3 habitats :
Coastal Berm
Disturbed Upland
Rockland Hammock

All Images:

Cenchrus brownii