424 ashe: a new shrubby buckeye 



tion to the radioactivity that lead, bismuth, and barium were 

 very carefully tested for. 



When time permits drill cores of the accompanying rock will 

 be analyzed in the hope of throwing some light on the source of 

 the large strontium content; this metal being of rare occurrence 

 in surface rocks of this locality. Dr. R. B. Moore who kindly 

 made the determination of the radioactive matter states that the 

 amount is not excessive for water of this character. 



For the collection of the water the Survey is indebted to Mr. 

 John G. Pew, Vice-President of the Company. 



BOTANY. — A new shnibby buckeye. W. W. Ashe, Forest 

 Service. 



Aesculus microcarpa sp. nov. Leaves with slender glabrous pet- 

 ioles, much longer than the middle leaflet; mostly five obovate- 

 oblong leaflets, which are sharply serrate, slender petiolulate, 

 glabrous on unfolding except for minute tufts of hair in the axils 

 of the veins; when mature glabrous, firm in texture and pale be- 

 neath; twigs slender, glabrous, glaucescent. Flowers, opening in 

 Rabun County, Georgia, the last of April and early in May, 

 about 3 cm. long, pale yellow or toward base orange, petals con- 

 nivent, very unequal, puberulent, the claws puberulent; claws 

 of lateral pair longer than calyx tube, the limb ovate or oblong; 

 pedicels slender, mostly longer than the oblong-campanulate 

 puberulent calyx tube. Fruit smooth, about 3 cm. thick, one- 

 seeded, with thin, smooth reddish brown valves; seed spheroid, 

 about 2 cm. in diameter. A shrub 1 to 3 m. in height. Growing 

 with Aesculus pavia L. along rocky banks of streams and open 

 red clay hills of western South Carolina and northern Georgia, 

 between altitudes of 160 and 500 m. Type material which is in 

 the herbarium of the author, is from Cherchero Creek, Rabun 

 County, Georgia; it was collected in April and September, 1911. 



This shrub is most closely related to Aesculus octandra Marsh, 

 which grows with it along the upper edge of its distribution in 

 Rabun County, Georgia. The flowers of the proposed species 

 are about one-third larger than those of Ae. octandra, more slen- 

 der, not so pubescent, the calyx more tubular, and the thyrse is 

 smaller. The seed is solitary, spheroid, and about one-half the 

 size of that of Ae. octandra. 



