118 JOURNAL OF THE .UlNOLD ARBORETUM [vol. u 



collected in flower in 1904 on the Black Range, New Mexico, by O. B, 

 calfe are nearly glabrous. 



Distribution. "With the species on many of the mountain ranges of southern 

 New Mexico and Arizona usually at altitudes between 1800 and 2000 m. 



The oldest specimens of this variety which I have seen were collected by 

 J. G, Lemraon on the Chiricahua Mountains, Arizona, May, 1881, **Tree 

 40"" high" (No. 156 in Herb, Gray), by Pringle in **rich cafions" of the 

 Santa Rita Mountains, Arizona, in July, 1881, and by Rusby (No. 2159) on 

 the Mogollo^ Mountains, New Mexico, in August, 1881. 



Aesculus 



Aesculus glabra Willd. 



described 



by Willdenow (Enum, PL 405 [1809]) are ^'glaberrima/' The type was a 

 tree cultivated at Berlin, and wald trees w^ith entirely glabrous leaves occur, 

 but appear to be extremely rare, and are found chiefly in the region east of 

 the Mississippi River. Usually the leaflets are furnished below with con- 

 spicuous tufts of axillary hairs, and westward their lower surface is often 

 covered in early spring wuth loose, flocoose hairs which are most abundant 

 on the midrib and veins, and usually disappear before the beginning of the 

 summer. More distinct is a form with leaflets thickly covered below with 

 close, dense pubescence, persistent during this season. WTiat is evidently 

 this form w\as described as Aesculus pallida by Willdenow (1. c. 406) who 

 says of it "Folia subtus pubescentia et ut in A. Pavia atque flava in axillis 

 venarum fasciculo pilorum instructa, quum praecedentis [A. glabra] folia 

 semper glaberrima sint." This form, although it differs from the type only 

 in the pubescence of the leaves and young branchlets, is probably best con- 

 sidered a variety, especially as it is found only in a comparatively restricted 

 area. Treated as such it becomes: 



Aesculus glabra var. pallida Kirchner in Petzold and Kirchner, Arb, 

 Muse. 166 (1864). 



The only specimens of this variety which I have seen are the following: 



Iowa, Indianola, Warren County, and Moringona, Boone County, i. //. 

 Pammely August and September, 1912. 



Missouri. Hannibal, Marlon County , J, Davis (No. 213C), September, 1913; 

 Galena, Stone County, E. J. Palmer (No. 5706) May» 1914; Eagle Rock, 

 Barry County, E, J, Palmer (No. 6286) July, 1914. 



Arkansas. Winslow, Washington County, E, J, Palmer (No. 82G3) July, 

 1915, 



It is interesting that the variety of A. glabra with usually seven leaflets 

 (var. Buckleyi Sarg.) from Jackson County, Missouri, the type locality, is 

 pubescent, that a specimen of this variety from eastern Kansas is nearly 

 glabrous and that specimens from Ohio and Mississippi are glabrous, 



Aesculus octandra Marsh. As long ago as 1856 Asa Gray in the third 

 edition of his Manual described a var. piirpurascens of this species. He 

 referred to his variety Aesculus discolor of Pursh as a synonym and gave 

 the range from W. Virginia southward and westward. The flowers (both 



