Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Commelinids: Poales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Sorghum halepense
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 Johnsongrass from the Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Sorghum halepense
FAMILY
Poaceae
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 25 (2003)
Sorghum halepense
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 029-88-001:
Sorghum halepense FAMILY Poaceae
SYNONYMOUS WITH (ORTHOGRAPHIC VARIANT) Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Sorgum halepense
SYNONYMOUS WITH Manual of the Grasses of the US (Hitchcock & Chase, 1950)
Sorghum halepense
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Holcus halepensis
COMMON NAME:
Johnsongrass
To see larger pictures, click or hover over the thumbnails.
JK Marlow jkm0307k_33
July Greenville County SC
Roadside
One of our most pernicious weeds, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
JK Marlow jkm0407y_33
July Greenville County SC
Roadside
A serious weed, difficult to eradicate, per Weakley's Flora.
JK Marlow jkm140730_217
July Greenville County SC
Cleveland Park
It's easy not to notice the feathery stigmas of wind-pollinated grass flowers.
JK Marlow jkm0308m_10
August Greenville County SC
Leaves to 24" long, 0.4-0.8" wide, developing a prominent white midvein, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Gill Newberry gn09_sorgum_halepense_inf
September
Open spreading panicle 15-50cm long, w numerous whorled projecting branches, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
JK Marlow jkm0309e_10a
September Greenville County SC
Roadside
Its panicle has a reddish color a little different from any other grass, per All About Weeds (Spencer, 1940).
JK Marlow s071027_b
October Abbeville County SC
Field
Spikelets paired: one silky and sessile, one stalked and smooth, both w awns, per Wildflowers of Tennessee (Carman, 2005).
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Sorghum halepense
FAMILY
Poaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Sorghum halepense
FAMILY
Poaceae
SYNONYMOUS WITH
Flora of North America north of Mexico, vol. 25
Sorghum halepense
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 029-88-001:
Sorghum halepense
FAMILY
Poaceae
SYNONYMOUS WITH (ORTHOGRAPHIC VARIANT)
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Sorgum halepense
SYNONYMOUS WITH
Manual of the Grasses of the US (Hitchcock & Chase, 1950)
Sorghum halepense
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Holcus halepensis
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
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