| Carex viridula Michx. | |
| Publ. & Syn. | Michx., Fl. Bor.-Amer. 2: 170 (1803). Holotype (P): Canada: Quebec, "entre Montréal et les trois Riviéres", leg. Michaux. - Carex oederi subsp. viridula (Michx.) Hultén, Ark. Bot., n. s., 7, 1: 30 (1968). |
| Notes | Ball: No-one has demonstrated that Carex serotina and C. viridula can in any way be distinguished. Also C. viridula is variable. Elven: Many authors (e.g., Schmid 1983, 1986; Pykälä and Toivonen 1994; Crins 2002b) have considered European C. serotina and North American C. viridula to be one species under the priority name C. viridula. I concur but am not yet convinced all the variation belongs within one subspecies or variety (Schmid's subsp. viridula as opposed to subsp. brachyrhyncha = C. lepidocarpa; Pykälä and Toivonen's var. viridula). There is some variation in northern Europe (see, e.g., Hylander's 1966 and Palmgren's subsp. fennica) that would disappear in such a merger. The matter should be left for some cross-Atlantic molecular comparison. For the Checklist, we synonymize C. serotina with C. viridula (var. viridula) but keep var. pulchella apart. |
| Chromosomes | 68 70 72. - Europe. - Several reports, many for C. oederi auct. or C. serotina. |
| Geography | North American - amphi-Atlantic - European - Asian (W). |
| Parent taxon | Carex L. |
| PAF ID | 3309024 |