J. S. Rodwell. Potentilla anserina - Carex nigra dune - slack community and Taraxacum officinale agg . with Sagina procumbens Agrostis stolonifera , Carex nigra , Potentilla anserina , sometimes finding a hold in more open patches ...
... Carex nigra plants forming elevated dense tussocks are often named C nigra subs p. juncella, as opposed to rhizomatous C. nigra subsp. nigra. It is uncertain, however, whether the cespitose growth form is a hereditary trait useful for ...
... Fig. 101 Inflorescence and overtopping lowermost bract of Carex lenticularis. Fig.102 Perigynium of Carex nigra. 1b. Achenes with a constriction or indentation on one or both margins; perigynia ellipsoid to obovoid ...