EIvISHA MITCHELIy SCIENTIFIC SOCIETY. 89 



the cup, or the wall of the cup rolled inward around 

 the marg^in. These trees are frequent. Ten or twelve 

 were seen, which were essentially alike in foilag-e; and 

 those which had fruit agreed in that. 



Form 2. — The leaves are long-er than in the above, 

 4 to 6 inches long- ; mostly oblong- in outline ; always 

 three lobes at the summit, usually with long- falcate 

 lobes; either dentate or lobed on the marg-ins. There 

 are some scattering- white pubescence of cinereaover the 

 lower surface and tufts of coarse hairs in the axils of 

 the veins. The bark is rough and black. The trees 

 usually fork and have the g-eneral appearance of Cates- 

 baei. The leaves turn scarlet in the fall like those of 

 Catesba^i. The acorns vary a g-ood deal but are more 

 g^enerally like those of cinerea. Several of these trees 

 were seen. 



Q. cinerea x Q. laurifolia. — Leaves oval or oblong-, 

 1.5 to 2 inches long-, acute at each end; deep g-reen and 

 shining- above, below lig-hter and covered, especially on 

 young- shoots, with a scattering- appressed tomentum. 

 The leaves of young' shoots are variously lobed, espe- 

 cially towards the summit. The midrib is very prom- 

 inent, and also one or two pairs of lateral veins. No 

 tufts of hairs are in the axils of the leaves. Twig's are 

 covered when young- with a thick white pubescence. 

 The trees are small, 15 to 25 feet hig-h, with broad, 

 spreading-, g-lobose crowns, rather resembling- laurifo- 

 lia. Leaves remain brigfht g-reen, or partly turn 

 yellowish by December 6. Nut is brown, smooth, 

 obscurely ribbed, subg-lobose; cup deep, covering- from 

 one-third to one-half of the nut; scales smooth, firmly 

 appressed. Acorns are almost intermediate in character 

 between those of the parents, except in pubescence. 

 The fertile embryos are larg-eh^ atrophied. Several 



