1020] REHDER, NEW SPECIES, VARIETIES AND COMBINATIONS 121 



hairs and glands on the margin of the petals indicate the hybrid origi(n of 

 the Harbison plants and the pubescent under surface of its leaflets point 

 to A. discolor var. mollis rather than to A. Pavia as one of the parents of 

 this hybrid. 



mississippiensis 



Leaves 



upper side and 8-10 cm. in length; leaflets elliptic to oblong-obovate, acu- 

 minate and often abruptly pointed at apex cuneate or rounded and often 

 unsymmetric at base, finely often doubly serrate with incurved gland-tipped 

 teeth, glabrous with the exception of short hairs scattered on the upper side 

 of the lower part of the midrib and of small tufts of axillary hairs, 9-10 cm. 

 long, 4-5 cm. wide, and sessile or raised on a short pubescent petiolule. 

 Flowers appearing early in April in puberulous panicles 8-10 cm. in length 

 on slender slightly pubescent pedicels, 6-8 mm. long; calyx narrow-cam- 

 panulate, red, glabrous, the lobes ciliate on the margin ; petals dark red or 



pubescent 



Fruit 



seed 



nut-brown with a small hilum. 



A tree 6 to 7 m. high with a trunk 16 cm. in diameter and slender glabrous 



branchlets. 



Mississippi. Low woods ; near Brookville, Noxubee County, T. G. Harbison 

 (Nos. 1061, type and 1061 A), April 8, and October, 1913. 



The mixture of hairs and glands on the margin of the petals of this tree 

 indicate that it is a hybrid of a species of the subsection Octandrae with one 

 of the Eupaviae. Of the former subsection only A. glabra growls in southern 

 Mississippi where both A. Pavia and A. discolor var. mollis, of the Eupaviae 

 are common ; and the general absence of pubescence from the leaflets of the 

 hybrid point to A. Pavia as its other parent. Two specimens collected at 

 Starkville, Oktibbeha County, Mississippi, by T. G. Harbison (Nos. 1Q54 

 and 1056) April 7, 1913, with rather larger flowers, probably represent the 

 same hybrid. 



NEW SPECIES, VARIETIES AND COMBINATIONS FROM 



HERBARIUM 



ARBORETUM 



Alfeed Rehdeb 



ROSACEAE (continued) 



Prunus L. 



X Prunus amoldiana, hybr. nov. (P. cerasifera X triloba). 



Frutex 2-metralis v. ultra, ramosissimus, satis densus, ramis patentibus 

 divaricatis; ramuli annotini glabri, plerumque virides, annotini fusco- 

 rubri; gemmae ovatae, parvae, pleraeque stipuhs paucis praeditae. FoUa 



* Continued from p. 62. 



