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Floristic Inventory of the Florida Keys Database Online

Cenchrus brownii Roem. & Schult.
Slimbristle sandbur

Cenchrus brownii
Copyright by: plantillustrations.org (public domain)
originally published in Martius, C., Eichler, A.G., Urban, I., Flora Brasiliensis, vol. 2(2): fasicle 72, t. 43 (1877) [J. Huegel & J.C. Doell]

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.

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

Map of select IRC data for peninsular Florida

SOUTH FLORIDA Occurrence: Presumed Extirpated

SOUTH FLORIDA Native Status: Native

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.

FLORIDA KEYS Occurrence: Presumed Extirpated

FLORIDA KEYS Native Status: Presumed Extirpated

IRC FLORIDA KEYS Status: Presumed Extirpated

Map of select IRC data for the Florida Keys

Florida Keys History and Distribution: Reported in 1913 by John Kunkel Small for hammocks in the upper Keys.  We consider this native and presumed extirpated from the upper Keys to the lower Keys.  Last collected in 1954 on the island of Key West by Ellsworth P. Killip (44292, US).  For more information, see IRC's species account.

Other data on Cenchrus brownii available from :






Cenchrus brownii has been reported for the following 3 habitats in THE FLORIDA KEYS :
Coastal Berm
Disturbed Upland
Rockland Hammock


All Images:

Cenchrus brownii
Copyright by: plantillustrations.org (public domain)
originally published in Martius, C., Eichler, A.G., Urban, I., Flora Brasiliensis, vol. 2(2): fasicle 72, t. 43 (1877) [J. Huegel & J.C. Doell]