Atlas of North European vascular plants
Hultén & Fries 1986
659 Rumex angiocarpus Murb. and R. graminifolius Lamb.
These two closely related taxa are also considered as subspecies of R. acetosella. Their pattern of distribution is completely different. To the map 659 R. angiocarpus should be added the marginal note Australia. However, the distribution is on the whole insufficiently known. See further Hultén, Circumpol. Il, p. 306, 401, and the literature cited under R. acetosella.