P)'occcdiusi;s of the Ohio Sfafc Academy of Science 155 



ing on the branches until late in the winter. The best hawthorn 

 for hedges. Quebec to -Manitoba. N. H., Fla., Tex., and Ohio. 



2. Crataegus brevispina (Dougl.) Farw. Black Haw- 

 thorn. A small tree. Leaves obovate, unequally serrate or 

 somewhat lol)efl. cuneate or narrowed at the base. Mich., to Br. 

 Col, Colo., and Ore. 



3. Crataegus punctata J acq. Dotted Hawthorn. A 

 shrub or small tree with horizontal wide-spreading branches. 

 Leaves obovate, slender-petioled, irregularly serrate or serrulate. 

 Fruit somewhat edible. Quebec and Ont., to N. H., Ga. and 

 Iowa. Ohio. 



4. Crataegus cordata (]\Iill.) Ait. Washington Haw- 

 thorn. A tree with slender thorns. Leaves broadly ovate, gen- 

 erally sharply 3-7-lobed and serrate. A very desirable species for 

 cultivation. \'a. to Ga., 111., anl Tenn. Also from N. J. to Ohio. 



5. Crataegus eggerti llritt. Eggert Haw'th.orn. A small 

 tree growing in dry soil. Leaves ovate-orbicular, dull green 

 above, i)ale beneath, sharplv and irregularly serrate or somewhat 

 lobed. Iowa to Mo. and Kan. 



6. Crataegus oxyacantha L. English Hawthorn. A 

 shrub or small tree with numerous stout thorns. Leaves broadly 

 ovate or slightly obovate, sharply 3-7-lobed. Sparingly escaped 

 from cultivation. Ohio. 



7. Crataegus viridis L. Green Hawthorn. A small tree 

 often without thorns. Fruit persisting into the winter. Leaves 

 ovate to lanceolate or somewhat obovate, sharply serrate, and 

 somewhat lobed. Afo. and Kan. to Tex., S. Car., and Fla. 



8. Crataegus coccinea L. Scarlet Flawthorn. A shrub 

 or small low tree with crooked spreading branches and short stou'- 

 thorns. Leaves broadlv ovate or orbicular, sharply incised and 

 serrate, teeth glancl-tippcd. I^^rtiit somewhat edible. Of consid- 

 erable decorative value. Petioles with glands. Xewf. to Man., 

 Fla., Tex., and r)hio. 



9. Crataegus rotundifolia (Ehrh.) Borck. Glandular 

 Hawthorn. A shrub or small tree, the petioles with glands. 

 Leaves oval, ovate. obf)vate, or nearU- orbicular, incised-serrate 



