- Bottoms of Sydenham River, Mosa Twp, ca 6 km SE of Alvinston.1
- Boyce Farmland, Drumlin Farm Sanctuary, Massachusetts Audubon Society, Lincoln1
- Cambridge, Gray Botanic Garden1
- City of London Twp., Mount Pleasant Cemetery1
- City of London township, North Street Woods, Byron.1
- City of London, Fanshawe Conservation Area.1
- City of London, Kilally Road Black Maple stand, North Branch Thames River. 4.2 km SW of Fanshawe Lake dam.1
- City of London, Sifton (=Byron) Bog, west end of city, North of Thames R.1
- City of London, Snake Creek from junction at Medway Creek to Wonderland Road.1
- Clarendon1
- Concord. South of Walden Pond, west end.1
- Delaware Township, Komoka park reserve, along Thames River 5 miles west of London, about 1 mile east of Komoka. Entrance road to area 3 by curve.1
- East Haddam midslope woods, Devils Hopyard State Park1
- Ekfrid Twp., on north bank of Thames River, 1¼ miles south of Melbourne, (farm of Dougald Murray)1
- Framingham.1
- Glenwood Springs, growing in patch of forest between cliff of Birds Cave Rock and road Balcarres-Sunbury1
- Granny Hill, Lexington.1
- Gray Botanic Garden, Cambridge1
- Hellshire Hills1
- Komoka Park Reserve. Delaware Twp, Study Area #5, off county rd 14.1