Harvard University Herbaria & Libraries

Betulaceae
GH: 02196908 Betula caerulea-grandis Blanchard Canada: New Brunswick 1/2 mi. north of Grand Harbour, Grand Manan O. L. Loucks 154 1961-10-5
GH: 02196919 Betula caerulea-grandis Blanchard USA: New York Whiteface Mountain, Memorial Highway, 100 yd... O. L. Loucks 1964-7-17
GH: 02194993 Betula papyrifera Marshall USA: Minnesota [data not captured] O. L. Loucks 1982-8-22
GH: 02193167 Betula papyrifera Marshall USA: Wisconsin [data not captured] O. L. Loucks 1964-6-17
GH: 02193166 Betula papyrifera Marshall USA: Wisconsin [data not captured] O. L. Loucks 1964-6-17
GH: 02193153 Betula papyrifera Marshall USA: Wisconsin [data not captured] O. L. Loucks 1964-6-15
GH: 02193152 Betula papyrifera Marshall USA: Wisconsin [data not captured] O. L. Loucks 1964-6-17
GH: 02193151 Betula papyrifera Marshall USA: Wisconsin [data not captured] O. L. Loucks 1963-7-23
GH: 02193144 Betula papyrifera Marshall USA: Wisconsin [data not captured] O. L. Loucks 1964-6-17
GH: 02193143 Betula papyrifera Marshall USA: Wisconsin [data not captured] O. L. Loucks 1964-06-17
GH: 02193142 Betula papyrifera Marshall USA: Wisconsin [data not captured] O. L. Loucks 1963-7-23
GH: 02193335 Betula papyrifera cordifolia (Regel) Regel USA: Wisconsin [data not captured] O. L. Loucks 1964-6-15
GH: 02193330 Betula papyrifera cordifolia (Regel) Regel USA: Wisconsin [data not captured] O. L. Loucks
GH: 02193320 Betula papyrifera cordifolia (Regel) Regel USA: Minnesota [data not captured] O. L. Loucks 1982-8-22
GH: 02193853 Betula sandbergii Britton USA: Wisconsin [data not captured] O. L. Loucks 1963-7-15