222 PROCEEDINGS OF THE ACADEMY OF [March - 



Corymbs many-flowered; stamens 10; anthers pale yellow; fruit 

 subglobose. 

 Leaves subcoriaceous ; fruit 1.2-1.5 cm. in diameter. 



1. C. rotund if olio. 

 Leaves thin; fruit usually less than 1 cm. in diameter. 



2. C. DodgeL 

 Corymbs few-flowered. 

 Stamens 10 or less. 



Anthers pale yellow; stamens 10; leaves broadly ovate, thick; 



fruit subglobose to short-oblong 3. C. grossu. 



Anthers slightly tinged with pink; stamens 5 or 6; leaves 

 rhombic to slightly obovate, thin; fruit obovate. 



4. C. dacrioidea. 

 Stamens 10-15; anthers cream color; leaves ovate to obovate,. 



thin 5. C. varians. 



Stamens 20 (15-20 in No. 9). 

 Anthers cream color. 



Flowers less than 2 cm. in diameter, in 3-6-flowered 

 corymbs. 

 Leaves obovate, crenately serrate, glabrous. 



6. C. Broivnii. 

 Leaves ovate to oval or rhombic, with straight teeth,. 



villose above while young 7. C. repentina. 



Flowers at least 2.5 cm. in diameter, in 5-12-flowered 

 corymbs ; leaves ovate to obovate, villose while young. 



8. C. scopulorum. 



Anthers rose color; leaves broadly ovate to obovate; fruit 



subglobose, usually broader than long 9. C. ignava. 



1. Crataegus rotundifolia (Ehrhart) Moench. 



Baum. Weiss, 29, t. 1 (17S5). Eggleston, Britton N. Am. Trees, 464; 

 Gray Man., ed. 7, 468. 



Mespilus glandulosa Ehrhart. Beitr., Ill, 20 (1788). 



Crataegus horrida Medicus, Gesch. Bot., 84 (1793). 



Mespilus rotundifolia Du Roi, Harbk. Baume (excl. svn. Crataegus glandu- 

 losa Aiton) (1795). 



Cratwgus glandulosa Willdenow, Berl. Baumz., 84 (excel, syn. Crataegus- 

 sanguined) (1796). 



Crataegus coccinea Lindley, Bot. Reg., XXIII. t. 1957 (not Linnaeus) (1837). 



Crataegus coccinea, var. rotundifolia Sargent, Bot. Gazette, XXXI, 14 (1900)- 

 Silva N. Am.. XIII, 134; Man., 460; Proc. Acad. Nat, Sci. Phila., 1905, 

 631; Bull. X. Y. State Mus., CV, 64, CXXII, 72. 



Crataegus rotundifolia var. Bicknellii Eggleston, Rhodora, X, 79 (190S); 

 Gray Man., ed. 7, 469. 



Keyser Valley, near Scranton, Lackawanna County, A. Twining, 

 (No. 14) May 23 and September 14, 1908, June 4, 1909; East Altoona, 

 Blair County, B. H. Smith and C. S. Sargent, (No. 290), B. H. Smith,. 

 May 17, 1906; between Portage and Wilmore, Cambria County, B. H. 

 Smith, May 21, 1905, B. H. Smith and C. S. Sargent, September 26 r 

 1905; also eastern Canada and New England to Illinois. 



