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Weeds and Plant Identification
Large crabgrass - Digitaria sanguinalis




Large crabgrass Digitaria sanguinalis (L.) Scop.

Poaceae (Grass family)
Life cycle
Prostrate to ascending summer annual.
Both leaf surfaces and sheath are densely hairy. Leaves are rolled in the bud and more numerous at the base. Leaves are generally shorter, wider and more tapered than those of most other grasses.
Jagged, membranous ligule.
Prostrate to ascending stems may reach 3 feet tall, capable of rooting at the nodes. Mature stems are often compressed in cross-section.
Flowers and fruit
The seedhead is a terminal panicle that consists of a few to several slender, fingerlike branches arranged in a whorl. Each plant is capable of producing thousands of yellowish brown, narrow oval to lance-shaped seeds.
Similar weeds
Smooth crabgrass [Digitaria ischaemum (Schreb.) Schreb. ex Muhl.]
Differs by having a smaller stature, hairless to sparsely hairy leaves and sheath, a tuft of long hairs at the collar region and stems that do not root at the nodes.

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