lOlS] Additions to Arbokescext Floea 137 



large as tlie typical form, from which is readily separated by the 

 acorn cup being deeper and having a more pointed base. 



QuERCUs Margaretta* is variable and some of the nearly related 

 forms from the Gulf States which have recently been proposed by 

 Dr. Sargent should be looked for in eastern Xorth Carolina. 



Ulmus floridana Chapm. This tree, which is confined to the 

 swamps of the coast, is smaller in every way than the white elm. Its 

 leaves are not quite so pubescent and the twigs are quite glabrous. 

 It is common around Xew Bern. 



Plai^era aquatica Gmel. occurs in the southeni corner of the 

 State. 



Celtis mississippiensis Bosc, which has thin taper-pointed leaves, 

 often with entire margins, occurs along the larger streams in the 

 eastern part of the State. 



Celtis georgiaxa Small, which is mentioned in the Trees of Xorth 

 Carolina as a shrub, frequently becomes a small tree, and should be 

 included among the trees. 



Magnolia cordata Mx, {Tidipastruiii cordatum' (Mx.) Small) 

 has been recorded only from the middle i)ortion of the State, in the 

 extreme northwestern corner of Moore or the adjoining part of Mont- 

 gomery County. For the yellow-flowered form which has been re- 

 ported from the mountains the name Magnolia acuminata aurea has 

 been proposed (P>u1. Ch. Museum 13:28. 1017). 



*Dr Sargent has i)roi)osed (Bot. Gaz. 65. 441. May, 1918) several varieties of Quercus 

 xleUata Wang, wliich on account, of their slender glabrous, or nearly glabrous, shining reddish- 

 tan twiK.s would seem better regarded as varieties Q. Margamtta.. These are Q. M. ar.\nioSa 

 n. comb. (<?. utellata var. Sarg. 1. c). This variety is based on material from Louisiana, the 

 distribution being given from Alabama to Texas. It seems to differ from the type Margaretta 

 only in the more floccose persistent tomentum on the lower surface of the leaves, the moro 

 slender branchlets and more scaly bark. 



Q. if. 1'.\m;i)().s.\ n. comb. (Q. Mtellatn var. Sarg. 1. c). Tlii.s i.s based by Dr. Sargent on 

 trees growing in a swamp in St. Landry Parish. La. It seems to differ from Q. Margaretta 

 only in its more uniformly 3-lol)ed leaves, tlie i)ubescence on the lower surface of which is 

 shorter and more jiersistent, the sjiaringly pubescent twigs and more scaly bark. 



Q. M. .ST()I.,()NIFKR.\ n. coml). (Q. nti'U<ita forma Sarg. 1. c). Tliis variety found near 

 Selma, Ala., is described as a shrub 1.5-2 ni. liigh. forming thickets by subterraneous shoots. 

 It differs further from the tyi)e in having smaller and narrower leaves. The same or a 

 closely related variety grows along the Pee l>ee River in Anson and Richmond counties, N. C, 

 although it here reaches a somewhat larger size. It has tlie same characteristic method of 

 vegetative propagation. It is bx-ally known as runner oak. 



