. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Specimens/Specimens CAN, DAO. HAM, MT. OAC, QK. TRT, UWO, WAT O Pre 1925 1925-1949 » 1950-1964 ⢠Posn964. After/D'après: Elias 1980, Linle 1971, SharlkA Barnes 1976. Wherry ef a/. 1979 HABITAT: Woods. STATUS: Rare in Canada. Rare in Ohio. NOTES: The annents of Betula lenta superficially resemble those of the common S. alleghaniensis Britt., but the bracts of the pistillate aments of B. lenta are glabrous with short lobes, whereas those of B. alleghaniensis are pubescent or ciliate with longer lobes. HABITAT: Forêts. SITUA
. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Specimens/Specimens CAN, DAO. HAM, MT. OAC, QK. TRT, UWO, WAT O Pre 1925 1925-1949 » 1950-1964 ⢠Posn964. After/D'après: Elias 1980, Linle 1971, SharlkA Barnes 1976. Wherry ef a/. 1979 HABITAT: Woods. STATUS: Rare in Canada. Rare in Ohio. NOTES: The annents of Betula lenta superficially resemble those of the common S. alleghaniensis Britt., but the bracts of the pistillate aments of B. lenta are glabrous with short lobes, whereas those of B. alleghaniensis are pubescent or ciliate with longer lobes. HABITAT: Forêts. SITUATION: Rare au Canada. Rare en Ohio. REMARQUE: Betula lenta ressemble superficielle- ment à l'espèce commune B. alleghaniensis Britt., mais les bractées des chatons pistillés de S. lenta sont glabres et portent des lobes courts, alors que celles de B. alleghaniensis sont pubescentes ou ciliées avec des lobes plus longs. REFERENCES / SOURCES Fox, , & Soper. 1954. The distribution of some trees and shrubs of the Carolinian zone of southern Ontario. Part III. Transactions of the Royal Canadian Institute 30: 99-130. Hosie, 1969/1972. Native trees of Canada/Arbres indigènes du Canada. 7^ edition/7e édition. Canadian Forestry Service/Service canadien des forêts, Ottawa. 380 p. Sharik, , & Barnes. 1971. Hybridization in Betula alleghaniensis Britt. and B. lenta L.: a comparative analysis of controlled crosses. Forest Science 17: 415-424. Sharik, , & Barnes. 1976. Phenology of shoot growth among diverse populations of yellow birch {Betula alleghaniensis) and sweet birch (B. lenta). Canadian Journal of Botany 54: 2122-2129. Sharik, & Barnes. 1979. Natural variation in morphology among diverse populations of yellow birch {Betula alleghaniensis) and sweet birch (B. lenta). Canadian Journal of Botany 57: 1932-1939. Sharik, , & Ford. 1984. Variation and taxonomy of Betula uber, B. le
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