Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Commelinids: Poales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Paspalum dilatatum ssp. dilatatum
FAMILY
Poaceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Learn more about Dallis-grass from the Vascular Plants of North Carolina.
INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Paspalum dilatatum
FAMILY
Poaceae
INCLUDED WITHIN Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Paspalum dilatatum
INCLUDED WITHIN Flora of North America north of Mexico, vol. 25 (2003)
Paspalum dilatatum
INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 029-74-006:
Paspalum dilatatum FAMILY Poaceae
INCLUDED WITHIN Manual of the Grasses of the US (Hitchcock & Chase, 1950)
Paspalum dilatatum
INCLUDED WITHIN Manual of the Southeastern Flora (Small, 1933, 1938)
Paspalum dilatatum
COMMON NAME:
Dallis-grass
To see larger pictures, click or hover over the thumbnails.
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_padi3_001_lvd
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USDA-NRCS PLANTS Database / Hitchcock, A.S. (rev. A. Chase). 1950 pnd_padi3_002_lvd
)
USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide pnd_padi3_005_lvd
)
USDA / Selected Weeds of the US. 1970 swus_page_075
)
Gill Newberry gn04_paspalum_diatatum
April
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Glen Peterson gkp9309_pdilatatum01
August Spartanburg County SC
Terminal racemes with 3-7 alternate spreading branches, spikelets 4-rowed, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
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Glen Peterson gkp9317_purvilleivsdilata
August Spartanburg County SC
Culms of P. urvillei (left) 1-2m tall, vs. P. dilatatum (right) 0.6-1.2m tall, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Glen Peterson gkp9319_pdilatatum02
August Spartanburg County SC
Sheaths sparsely hairy near base of plant and hairless above, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
)
Glen Peterson gkp9331_pdilatatum03
August Spartanburg County SC
Ligule membrane 2-3mm long, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
)
Glen Peterson gkp9338_pdilatatumvsurvel
August Spartanburg County SC
Ligules of P. dilatatum (on left) vs. P. urvillei (on right).
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Glen Peterson gkp9356_pdilatatumbloom
August Spartanburg County SC
Spikelets ovate, acuminate, 3-4mm [anthers & feathery stigmas protruding], per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Glen Peterson gkp9381_pdilatatumvsurvel
August Spartanburg County SC
P. dilatatum on the left, P. urvillei on the right.
)
Gill Newberry gn09_p_diatatum_closeup2
September
Spikelets have long silky hairs like P. urvillei, but are larger (3-3.5mm), per Wildflowers of the Eastern United States (Duncan & Duncan, 1999).
)
Gill Newberry gn09_p_diatatum_habitat
September
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Paspalum dilatatum ssp. dilatatum
FAMILY
Poaceae
INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Paspalum dilatatum
FAMILY
Poaceae
INCLUDED WITHIN
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Paspalum dilatatum
INCLUDED WITHIN
Flora of North America north of Mexico, vol. 25
Paspalum dilatatum
INCLUDED WITHIN
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 029-74-006:
Paspalum dilatatum
FAMILY
Poaceae
INCLUDED WITHIN
Manual of the Grasses of the US (Hitchcock & Chase, 1950)
Paspalum dilatatum
INCLUDED WITHIN
Manual of the Southeastern Flora (Small, 1933, 1938)
Paspalum dilatatum
2251
Grass, Sedge, or Rush
Perennial
Habitat: Roadsides, fields, disturbed areas, per Weakley's Flora
Non-native: tropical America
Common
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
This plant may be causing problems in natural areas outside its native range, according to authorities such as:
LEAVES:
Simple
Mostly basal & low alternate, 2-ranked
RHIZOMES? STOLONS?
Cespitose [growing in dense tufts, clumping], rhizomatous
FLOWER:
Spring/Summer/Fall
Inflorescence a panicle of 3-7 ascending racemose branches
FRUIT:
Spring/Summer/Fall
Grain grayish
Grain
TO LEARN MORE about this plant, look it up in a good book!
- Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005) p240
- Manual of the Grasses of the United States (Hitchcock & Chase, 1950) p615
- Wildflowers of the Eastern United States (Duncan & Duncan, 1999) p142
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