. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Specimens/Specimens CAN, DAO, MICH. , TRT. TRTE, WAT O Pre 1925 ©1925-1949 31950-1964 ⢠Posn964. ^i HABITAT: Bogs, swamps, beaver dams, and sandy, muddy, or rocky shorelines of lakes. STATUS: Possibly rare in Quebec. Endangered in Illinois, rare in Wisconsin. NOTES: Triadenum virginicum is regarded here as a distinct species from T. fraseri (Spach) Gleason in accord with the views of Reznicek (1985) and Meades (unpublished). These two taxa, which are distinguished by differences in style length and the shape and size
. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Specimens/Specimens CAN, DAO, MICH. , TRT. TRTE, WAT O Pre 1925 ©1925-1949 31950-1964 ⢠Posn964. ^i HABITAT: Bogs, swamps, beaver dams, and sandy, muddy, or rocky shorelines of lakes. STATUS: Possibly rare in Quebec. Endangered in Illinois, rare in Wisconsin. NOTES: Triadenum virginicum is regarded here as a distinct species from T. fraseri (Spach) Gleason in accord with the views of Reznicek (1985) and Meades (unpublished). These two taxa, which are distinguished by differences in style length and the shape and size of the calyx lobes, are distinct in Ontario and elsewhere in the Great Lakes region (Utech & litis 1970. Voss 1985), but they seem to intergrade in Nova Scotia. Two specimens of T. virginicum, collected by I. Bayly in 1967 from Taylor Lake, Gatineau Park. Quebec, are at the Carleton University herbarium in Ottawa. According to Bayly (pers. comm.), the plants were growing on floating mats in the middle of the lake. The possible rare status of this species in Quebec should be investigated. HABITAT: Tourbières, marais, barrages de castors et rives sablonneuses, boueuses ou rocheuses des lacs. SITUATION: Peut-être rare au Québec. Menacée d'extinction dans l'Illinois, rare au Wisconsin. REMARQUES: Triadenum virginicum est considérée comme une espèce distincte de T fraseri (Spach) Gleason. conformément aux vues de Reznicek (1985) et Meades (inédit). Ces deux taxons, qui se distinguent par des différences dans la longueur du style et dans la forme et la taille des lobes du calice, sont différents en Ontario et ailleurs dans la région des Grands lacs (Utech & litis 1970, Voss 1985), mais ils semblent manifester une intergradation en Nouvelle-Ecosse. Deux spécimens de T. virginicum, recueillis en 1967 par I. Bayly au lac Taylor, parc de la Gatineau (Québec), se trouvent à Ottawa, à l'herbarium de l'Université Carleton. Selon Ba
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectbotany
