Alopecurus, commonly known as foxtail grass, is a genus of approximately 43 accepted species of grasses in the family Poaceae (order Poales). The genus is widespread across temperate and subtropical regions of Eurasia, northern Africa, and the Americas, and has been naturalized in Australia and on numerous islands worldwide.
Plants in this genus are either annual or perennial and typically grow in tufts. They are characterized by flat leaves, blunt ligules (the small membranous flap at the junction of leaf blade and stem), and a distinctive dense, spike-like panicle inflorescence bearing one-flowered spikelets — a shape that gives the genus its common name of foxtail grass. The inflorescence closely resembles a fox's tail, being cylindrical and soft to the touch.
Species range from wetland and meadow plants to weeds of arable farmland. Alopecurus myosuroides (slender meadow foxtail, or black-grass) is one of the most economically significant species, being a widespread and problematic weed of winter cereal crops in Europe, where it has developed herbicide resistance in many populations. In contrast, several species such as Alopecurus pratensis (meadow foxtail) are valued as pasture grasses or ornamentals, and the attractive, soft inflorescences of multiple species are used in dried-flower arrangements.
Etymology
The name Alopecurus derives from the Greek alōpēx (fox) and ourá (tail), referring to the genus's characteristic dense, cylindrical, bristly inflorescence that resembles a fox's tail. The common name "foxtail grass" is a direct translation of this Greek original.
Distribution
The genus is distributed across temperate and subtropical parts of Eurasia (from the Azores to Mongolia), northern Africa, and the Americas. Several species extend into high-altitude habitats in the Himalayas, Caucasus, and Andes. The genus has also been naturalized in Australia and on various oceanic islands, partly through the spread of weedy species such as A. myosuroides.
Ecology
Most species grow in moist, open habitats including meadows, marshes, stream banks, and disturbed ground. Alopecurus myosuroides (black-grass) is a major arable weed in European winter cereal farming, where it competes aggressively with crops and has evolved resistance to multiple herbicide classes. Other species such as A. geniculatus (marsh meadow foxtail) thrive in seasonally flooded ground and ditches. The soft, cylindrical inflorescences are wind-pollinated.
