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Holcus L.
http://www.csdl.tamu.edu/FLORA/taes/tracy/610/holcus.html
Description and seed illustrations.
Holcus lanatus
http://plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=HOLA
Common velvetgrass image and US range.
Holcus lanatus
http://www.hear.org/pier/holan.htm
Description and status as an invasive in Hawaii.