Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Persicaria longiseta
FAMILY
Polygonaceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read more about Longbristle Smartweed at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Polygonum cespitosum var. longisetum
FAMILY
Polygonaceae
SYNONYMOUS WITH Flora of Florida (Wunderlin & Hansen [& Franck], 2015 et seq.)
Persicaria cespitosa var. longiseta
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 5 (2005)
Persicaria longiseta
SYNONYMOUS WITH Guide to the Vascular Plants of Florida (Wunderlin & Hansen, 2003)
Polygonum caespitosum var. longisetum
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 063-04-013:
Polygonum cespitosum var. longisetum FAMILY Polygonaceae
COMMON NAME:
Longbristle Smartweed, Bristly Lady's-thumb, Creeping Smartweed, Tufted Knotweed
To see larger pictures, click or hover over the thumbnails.
)
JK Marlow jkm120827_014
August Greenville County SC
Leaves smooth above, sparsely hairy on veins below, elliptic to lance-shaped, per Weeds of Southern Turfgrasses (Murphy et al., 1992).
)
JK Marlow jkm120827_020
August Greenville County SC
Racemes interrupted at least near the base, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm080927_010
September Greenville County SC
)
JK Marlow jkm080927_015
September Greenville County SC
Deep reddish-pink flowers on erect terminal spikes only 0.2" wide, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
)
JK Marlow jkm081001_025
October Greenville County SC
Base of leaf is cuneate, petiole 1-5 mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm081001_028
October Greenville County SC
An erect annual with glabrous, terete stems, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm081001_042
October Greenville County SC
The cilia on the ocreae are unmistakable: 1/4" to 3/8" long, per Wildflowers of the Southern Mountains (Smith, 1998).
COMPARE
ocreae of Jumpseed and Smartweed species
)
JK Marlow jkm081001_044
October Greenville County SC
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Persicaria longiseta
FAMILY
Polygonaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Polygonum cespitosum var. longisetum
FAMILY
Polygonaceae
SYNONYMOUS WITH
Flora of Florida (Wunderlin & Hansen [& Franck], 2015 et seq.)
Persicaria cespitosa var. longiseta
SYNONYMOUS WITH
Flora of North America north of Mexico, vol. 5
Persicaria longiseta
SYNONYMOUS WITH
Guide to the Vascular Plants of Florida (Wunderlin & Hansen, 2003)
Polygonum caespitosum var. longisetum
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 063-04-013:
Polygonum cespitosum var. longisetum
FAMILY
Polygonaceae
1120
Forb
Annual
Habitat: Disturbed areas, lawns, ditches, per Weakley's Flora
Non-native: Asia
Common (uncommon in Coastal Plain)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
This plant is causing problems in natural areas outside its native range, according to authorities such as:
- Georgia Exotic Pest Plant Council, 2006
- Kentucky Exotic Pest Plant Council, 2013
- Tennessee Exotic Pest Plant Council, 2009
- Virginia Department of Conservation and Recreation, 2014
IS THE PLANT "ARMED"?
Stems, petioles and leaves unarmed
LEAVES:
Simple
Alternate
FLOWER:
Spring/Summer/Fall
Pink
5-parted calyx
Petals absent
Superior ovary
Bisexual
Inflorescence spikelike, uninterrupted
FRUIT:
Spring/Summer/Fall
Black
Nutlet
TO LEARN MORE about this plant, look it up in a good book!
- Invasive Plants, Guide to Identification, Impacts and Control (Kaufman & Kaufman, 2007) p261
- Wildflowers of the Eastern United States (Duncan & Duncan, 1999) p004?
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005) p083?
- Wildflowers of the Southern Mountains (Smith, 1998) p033
- Wildflowers of the Sandhills Region (Sorrie, 2011) p258
- Weeds of Southern Turfgrasses (Murphy et al., 1992) p164
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
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Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".