Brachiaria platyphylla

Signalgrass has wide flat leaves with fine hairs along the stems and ligules. The leaves are hairless, unlike crabgrass, and usually prostrate but may occasionally get 3 feet tall. The blades are rolled with a tiny bit of hair on the nodes, which can root and spread vegetatively.
The seed heads form from July to September and have 2 to 6 seed coated spikelets. These produce numerous seeds which anchor and sprout readily. Signalgrass control can be achieved with constant tilling but the unvigilant gardener will find heavy patches springing up in un-worked soil.

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