brown-beard rice
(Oryza rufipogon)
This species is Introduced in the United States
Origin
Native to East, South, and Southeast Asia
Appearance
Scrambling grass to 3.3-16' (1-5 m), lower stems somewhat spongy.
Foliage
Linear, flat, 5.9-7.1" (15-18 cm) long, 10-25 mm wide. Distinct auricle (ear-like structure) where the leaf meets the blade.
Fruit
Brown, seeds 0.2-0.4" (4.5-10.6 mm) long, each with a long bristle (awn) 1.6-3.9" (4-10 cm) long. Seeds grow in a much-branched seed head (panicle), up to 7.8" (20 cm) long.
Could be confused with:
Guinea grass (not native) but leaf blade and not awned seed are different.
Citation
Angelo, C., Cooley, H., Giardina, D., et al. 2019. Everglades CISMA: Early Detection, Rapid Response Plant Species. Florida Exotic Pest Plant Council (FLEPPC) CISMA and Friends of Everglades CISMA. Retrieved from https://bugwoodcloud.org/mura/ECISMA/assets/File/ECISMA_plantEDRR_.pdf
Native to East, South, and Southeast Asia
Appearance
Scrambling grass to 3.3-16' (1-5 m), lower stems somewhat spongy.
Foliage
Linear, flat, 5.9-7.1" (15-18 cm) long, 10-25 mm wide. Distinct auricle (ear-like structure) where the leaf meets the blade.
Fruit
Brown, seeds 0.2-0.4" (4.5-10.6 mm) long, each with a long bristle (awn) 1.6-3.9" (4-10 cm) long. Seeds grow in a much-branched seed head (panicle), up to 7.8" (20 cm) long.
Could be confused with:
Guinea grass (not native) but leaf blade and not awned seed are different.
Citation
Angelo, C., Cooley, H., Giardina, D., et al. 2019. Everglades CISMA: Early Detection, Rapid Response Plant Species. Florida Exotic Pest Plant Council (FLEPPC) CISMA and Friends of Everglades CISMA. Retrieved from https://bugwoodcloud.org/mura/ECISMA/assets/File/ECISMA_plantEDRR_.pdf
Selected Images
Maps
EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org
State Lists - This map identifies those states that have this species on their invasive species list or law.
Invasive Listing Sources
Taxonomic Rank
| Domain: Eukarya |
| Kingdom: Plantae |
| Phylum: Magnoliophyta |
| Class: Magnoliopsida |
| Superorder: Lilianae |
| Order: Poales |
| Family: Poaceae |
| Genus: Oryza |
| Oryza rufipogon |
References
Common Name Reference: USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.
Scientific Name Reference: USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.