188 MISCELLANEOUS CIRCULAR 92, U. S. DEPT. OF AGRICULTURE 



Acer saccharum rugelii (Pax) Rehder. Sugar Maple. 



Range. — As now known rather local in its occurrence, in general being found 

 from southeastern Ohio to western Pennsylvania, southern Ontario, eastern 

 Tennessee, Michigan, Illinois, Indiana, eastern Missouri, and northwestern 

 Arkansas. 



NAME IN USE 



Sugar Maple 



Acer saccharum schneckii Rehder. 12 Sugar Maple. 



Range. — Southern Illinois and Indiana to Kentucky, eastern Tennessee, and 

 northern Georgia. 



name in use 

 Sugar Maple 



Acer saccharum glaucum Sargent. 13 Sugar Maple. 



Range. — To be looked for generally within range of Acer saccharum Marshall. 

 It is now known to occur from Isle-aux-Couvres in the St. Lawrence River, 

 Prince Edward Island, Nova Scotia, Lake St. John and Queen Ann's, Quebec to 

 Iowa and south to New York, Ohio, central Tennessee, western Pennsylvania, 

 South Carolina, Alabama, Mississippi, Louisiana, southeastern Oklahoma, and 

 southern Arkansas. 



name in use 



Sugar Maple 



Acer saccharum sinuosum (Rehder) Sargent. 14 Sugar Maple. 



Range. — Western Texas (border of Cibolo Creek in vicinity of Boerne, Kendall 

 County; also in Bandera County on upper Seco Creek, and in Uvalde County, 

 near Utopia). 



Note on nomenclature. — Formerly designated as Acer sinuosum Rehder. 



*Acer nigrum F. A. Michaux. Black Maple. 



Range. — From Quebec (valley of St. Lawrence River, vicinity of Montreal) 

 to New Hampshire (Cheshire County), western Vermont, Massachusetts, north- 

 western Connecticut, ranging westward in northern and western New York, 

 southern Ontario, Ohio, southern Michigan, Indiana, Illinois, and Iowa, to 

 northeastern South Dakota (Roberts County), central-western Missouri (Jackson 

 County), eastern Kansas (Lawrence County); southward it extends through 

 western Pennsylvania to West Virginia and Kentucky. 



Note on nomenclature. — Formerly designated as Acer saccharum nigrum 

 (Michaux fils) Britton, and as Acer barbatum var. nigrum Sargent. 



NAMES IN USE 



Black Sugar Maple (Mich., Mo.). Hard Maple (Minn., trade). 



Black Maple (Mich., Iowa). "White Maple." 



Acer nigrum palmeri Sargent. Black Maple. 



Range. — Illinois (Johnson County — Tunnel Hill) ; southern Indiana; Missouri 

 (Clark, Jackson, and Dunklin County). 



12 In its densely woolly leaves and leaf stems this variety comes near to Acer floridanum Pax, but in its 

 large-sized leaves relationship to Acer saccharum Marshall is suggested, to which it is gradually connected 

 by intermediate forms (Rehder). 



» C. S. Sargent in Bot. Gaz., LXVII, 233, 1919. First described in 1886 as a varietal form of the Sugar 

 Maple under the name Acer saccharinum var. glaucum Pax, which in 1902 was made a synonym (in part) 

 of Acer saccharum var. Eugelii Rehder. Previously it was generally considered a form only of Acer saccha- 

 rum Marshall. 



" Similar in general appearance to Acer grandidentatum Nuttall, Acer mexicanum Gray (a Mexican 

 species), and Acer floridanum Pax, but closely related to the latter species. 



