Tickle grass

Panicum trichoides, sometimes called ticklegrass or rough-leaved panic-grass, is a slender annual or short-lived perennial grass in the family Poaceae, widespread across the Neotropics from the southern United States and the Caribbean through Mexico, Central and South America. Plants are weak-stemmed and decumbent to ascending, 30-100 cm long, often rooting at the lower nodes and forming loose tangles in shaded ground. Culms are thin, smooth to softly pubescent. Leaf sheaths bear long, soft hairs especially near the collar; leaf blades are flat, lanceolate to ovate, 3-12 cm long and 5-25 mm wide, with bristly-ciliate margins and noticeably rounded to cordate bases. The inflorescence is a very delicate, broadly open, diffuse panicle 8-25 cm long, often as wide as long, with extremely fine, hair-like branches that diverge widely and bear small spikelets near their tips. Spikelets are tiny, 1.2-1.8 mm long, glabrous, with reduced first glume. It is a common weed of shaded gardens, plantations, and forest margins.