Hymenachne amplexicaulis is occasionally found growing in wet pastures from the central peninsula to Collier county. It is native to the West Indies and blooms in the fall (Wunderlin, 2003).
Robust perennial grass from stolons. Stems floating, creeping, or ascending to 1m (3 ft) or more in height; sparingly branched, rooting at the lower nodes; stems pithy, not hollow.
Sheaths glabrous but with hairs on upper margins; ligule a membrane. Leaf blades flat, to 35 cm (14 in) long and to 4 cm (1.6 in) wide; cordate at the base and clasping the stem (amplexicaul); glabrous but with long hairs on lower margins.
In a spike-like, densely flowered panicle, to 26 cm (10 in) long and ~1 cm (0.4 in) wide; spikelets short-stalked.
3–4 mm (0.12 – 0.16 in) long.
Displacing native maidencane communities; colonizing, and becoming difficult to control along drainage canals of south central Florida. FLEPPC Category I
C, SW, SE
Text from Invasive and Non-native Plants You Should Know – Recognition Cards 1
View the herbarium specimen image from the University of Florida Herbarium Digital Imaging Projects.
1. Identification and Biology of Nonnative Plants in Florida’s Natural Areas – Second Edition,
by K.A. Langeland, H.M. Cherry, et al. University of Florida-IFAS Publication # SP 257. 2008.
2. Invasive and Non-native Plants You Should Know – Recognition Cards,
by A. Richard and V. Ramey. University of Florida-IFAS Publication # SP 431. 2007.
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