. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Atlas of the Rare Vascular Plants of Ontario/Atlas des plantes vasculaires rares de l'Ontario CARYOPHYLLACEAE Paronychia fastlglata (Rat.) Fern. {Anychia fastigiata Rat., A. polygonoides Raf.) Hairy forked chickweed, whitlow-wort Paronychie. HABITAT: Clay or clay loam soil in clearings and openings of nnixed deciduous woodlands. STATUS: Rare in Canada. Rare in fvlinnesota and Delaware. NOTES: The continued persistence of Paronychia fastigiata near Canborough in the Regional Municipality of Haldimand-Norfolk was confirmed in 1
. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Atlas of the Rare Vascular Plants of Ontario/Atlas des plantes vasculaires rares de l'Ontario CARYOPHYLLACEAE Paronychia fastlglata (Rat.) Fern. {Anychia fastigiata Rat., A. polygonoides Raf.) Hairy forked chickweed, whitlow-wort Paronychie. HABITAT: Clay or clay loam soil in clearings and openings of nnixed deciduous woodlands. STATUS: Rare in Canada. Rare in fvlinnesota and Delaware. NOTES: The continued persistence of Paronychia fastigiata near Canborough in the Regional Municipality of Haldimand-Norfolk was confirmed in 1985. The occurrence of other rare species in this woodland, such as Carex glaucodea Tuckerman ex OIney, C. seorsa Howe, C. willdenowii Schkuhr ex Willd., and Danttionia compressa Austin ex Peck, all with similar southeastern or Appalachian affinities, suggests that P. fastigiata is native at this locality, rather than adventive as suggested by Cody (1970). In Quebec it has been reported as a casual introduction in the railroad yards at Val Royal (Rousseau 1968). HABITAT: Sol argileux ou argileux-loameux dans les clairières de boisés de peuplements caduques mixtes. SITUATION: Rare au Canada, au Delaware. Rare au Minnesota et REMARQUES: La persistance de Paronychia fastigiata près de Canborough, dans la municipalité régionale de Haldimand-Norfolk, a été confirmée en 1985. La présence d'autres espèces rares dans ce boisé, comme Carex glaucodea Tuckerman ex Qlney, C. seorsa Howe, C. willdenowii Schkuhr ex Willd., et Danthonia compressa Austin ex Peck, ayant toutes des affinités semblables dans le sud-est ou les Appalaches, suggère que P. fastigiata est une espèce indigène à cet endroit plutôt qu'adventice comme le suggère Cody (1970). Au Québec, on a noté que cette plante avait été introduite accidentellement dans les cours de triage des voies ferrées de Val Royal (Rousseau 1968). REFERENCES / SOURCES Cody, 197
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