. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Allas of the Rare Vascular Plants of Ontarb/Atlas des plantes vasculaires rares de l'Ontario ASTERACEAE Arnica lonchophylla Greene {A. alpina (L.) Olin & Ladau ssp. lonchophylla (Greene) Dougl. & G. Ruyie-Dougl., A alpina var. lonchophylla (Greene) Welsh, A. angustifolia Vahl ssp. lonchophylla (Greene) Dougl. & G. Ruyie-Dougl., A. chionopappa fern., A. femaldii Rydb., A. gaspensis Fern., A. wilsoniiRyôb.) Arnica, snowy arnica Arnica ~' â ''«J SE «j T, ; / r >- Specimen^Spécimens GH. JKM. NY, RM. U
. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Allas of the Rare Vascular Plants of Ontarb/Atlas des plantes vasculaires rares de l'Ontario ASTERACEAE Arnica lonchophylla Greene {A. alpina (L.) Olin & Ladau ssp. lonchophylla (Greene) Dougl. & G. Ruyie-Dougl., A alpina var. lonchophylla (Greene) Welsh, A. angustifolia Vahl ssp. lonchophylla (Greene) Dougl. & G. Ruyie-Dougl., A. chionopappa fern., A. femaldii Rydb., A. gaspensis Fern., A. wilsoniiRyôb.) Arnica, snowy arnica Arnica ~' â ''«J SE «j T, ; / r >- Specimen^Spécimens GH. JKM. NY, RM. UBC O Pre 1925 _^ 0)1925-1949 "~ ""^ Cl 1950-1964 \ ⢠Post 1964 ( V, / -- 111 / 0 100 MOkm y /' X ^^ ^ / 1 1 1 N 1 ^ n- si i p^ -fA j - 48 "^ L Y i 1 \ 1 \ / f i ^ i » 94 v. -^ T^ Ci )*>V^ , 7. HABITAT: Cold, calcareous sites in open woodlands, river gravels, shorelines, rocky barrens and outcrops, and cliff crevices. STATUS: Rare in Manitoba, New Brunswick, Nova Scotia, Saskatchewan, and Quebec. Threatened in Minnesota. NOTES: Plants of Arnica lonchophylla have campanulate-turbinate heads and prominently long- petiolate, regularly dentate leaves. In northwestern Canada, where the range of A. lonchophylla overlaps with that of A. angustifolia Vahl, some plants are difficult to assign to either species. This may be due to hybridization and subsequent introgression in this region. Because of the considerable polymorphism exhibited by these species, a large number of names have been proposed for segregates of each of them; names that have now been reduced to synonomy (Downie 1987). The only other taxon now recognized in A. lonchophylla is ssp. arnoglossa Greene. It is restricted to the Big Horn Mountains of northcentral Wyoming and the Black Hills region of South Dakota and is apparently quite rare in both states. HABITAT: Sites calcaires froides dans les boisés clairsemés, rivages de graviers de rivières, landes rocailleuses et affleu
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectbotany
