Sourgrass is a common name given to several plant species which have a sour taste. Most are in fact not grasses:
True grasses
- Digitaria insularis (sourgrass)
- Paspalum conjugatum (carabao grass)
Other
- Oxalis species (woodsorrels) of the Oxalidaceae, namely:
- Oxalis corniculata (creeping woodsorrel)
- Oxalis pes-caprae (Bermuda-buttercup)
- Oxalis grandis (large yellow woodsorrel)
- Oxalis montana (mountain woodsorrel)
- Oxalis stricta (yellow woodsorrel)
- Rumex acetosella (sorrel) of the Polygonaceae