392 



Ulmaceae 



Celtis 



\zr. 



Celtis 

 crassifol 



Map 

 occfdentalis 

 a (Lam.) Gray 



^30 

 803 



mon in such habitats throughout the state except in the dunes. This species 

 is commonly known as white elm. 



Newf. to Man., southw. to Fla. and Tex. 



1898. CELTIS [Tourn.] L. Hackberry 



Margins of leaves of fruiting branchlets and shoots sharply serrate all around to 



the base; leaf blades of an ovate to broadly ovate type, oblique at base, sometimes 



strongly so, those of fruiting branchlets 5-15 cm long; pedicels of fruit much 



longer than the petioles; nutlets 6-8 mm long; small or large trees. 



Leaf blades broadly ovate, acute or short-acuminate, smooth above. (See excluded 



species no. 182, p. 1040.) C. occidentalis. 



Leaf blades generally narrower than the type, apical half narrower, more curved, and 

 long-attenuate at the apex, usually smooth above but sometimes slightly rough . . 



l.C. occidentalis var. canina. 



Leaf blades as large as or larger than those of the preceding, more of an oblong- 

 ovate type, very rough above la. C. occidentalis var. crassifolia. 



Margins of leaves of fruiting branchlets usually entire, or some with a few teeth on 



one side or with a few teeth on both sides but never serrate on either side to the 



base; margins of leaves of vegetative branchlets and shoots similar to those of 



fruiting branchlets, or with the margins serrate nearly all around but never 



serrate to the base; pedicels of fruit shorter or only slightly longer than the 



petioles; nutlets 5-6 mm long. 



Leaves generally of an oblong-lanceolate type, generally thin, ours smooth above 



and medium green on both sides, not lighter or yellow green beneath ; blades 



of fruiting branchlets mostly 4-12 cm long and 2-4.5 cm wide; mature fruit a 



light cherry red; medium sized trees of a wet habitat 2. C. laevigata. 



Leaves mostly of an ovate-lanceolate type, sometimes ovate to broadly ovate or rarely 

 oblong-lanceolate, generally thick and yellow green beneath, generally smooth 

 but sometimes rough above; blades extremely variable in size and shape, mostly 

 3-10 cm long and 2-6 cm wide, usually about half the maximum size; branchlets 

 usually more or less pubescent; pedicels shorter or longer than the petioles; 

 mature fruit (collected in October) a dark cherry red; trees usually 1-2.5 m 

 high, but sometimes 4-6 m high and up to 1 dm in diameter near the base; of 

 a dry sandy, gravelly or rocky habitat ?>. C. pumila. 



1. Celtis occidentalis L. var. canina (Raf.) Sarg. (Celtis occidentalis 

 in part, of Cray. Man., ed. 7 and Britton and Brown, Illus. Flora, ed. 2.) 



