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Field Sandbur, Coast Sandspur

Cenchrus incertus

Family: Poaceae (poh-AY-see-ee) (Info)
Genus: Cenchrus (SENCH-rus) (Info)
Species: incertus (in-KER-tus) (Info)




Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


Unknown - Tell us


Unknown - Tell us


USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:

Full Sun

Sun to Partial Shade


Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:


Bloom Time:



Unknown - Tell us

Other details:

May be a noxious weed or invasive

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Gainesville, Florida

Keystone Heights, Florida

Melbourne Beach, Florida

Pensacola, Florida

Gardeners' Notes:


On Oct 6, 2011, alfu from Gainesville, FL wrote:

Until the seeds set, I find it quite impossible to differentiate it from less formidable grasses, which here in North Central Florida, the grass seems to wait until early September to do. Although the plant sends out rooting branches, it is a clump grass; the runners are above ground and not 'ropey' and underground, unlike another benign grass that looks virtually identical.


On Jul 26, 2004, MotherNature4 from Bartow, FL (Zone 9a) wrote:

Anyone with personal experience meeting one of these seed heads will give it a negative report. They are a menace, sending their barbs into the flesh of fingers, toes or paws.

HELPFUL HINT: Before trying to remove them, spit on your fingers and don't squeeze too hard. The barbs seem to slip in the saliva. This is an old "Florida Cracker" remedy from an old Florida Cracker.


On Jan 30, 2004, Floridian from Lutz, FL (Zone 9b) wrote:

MATURE PLANT Coast Sandspur is an annual or short-lived perennial. The stems are erect or bend at the lower nodes with the stem tips ascending. The leaf sheaths are either hairy or bare. The blades have a few scattered long hairs on the upper surface and often have scattered hairs at the base of the otherwise nonhairy lower surface. The seedheads of spiny burs are 2-8.5 cm wide and 4.1-7.0 mm long to the tip of the spikelets. The spines of only one kind are flattened and spread over the body of the bur. The seedheads appear throughout the year.
HABITAT This weed occurs throughout Florida in dry, sandy, cultivated and disturbed areas; in warmer parts of the United States from Virginia to California; Mexico; Central America; South America; the West Indies; the Philippine Islands; and ... read more