1925] PALMER, SYNOPSIS OF NORTH AMERICAN CRATAEGI 53 



Crataegus 



oblongifolia Sargent in N. Y. State Mus. Bull. cv. Bot. ix. 60 (1906) = 



C. urbica Sarg. 



obovatifolia Roemer, Fam. Nat. Syn. in. 120 (1847). — Punctatae. — (?) 

 obscura Sargent in Rep. Missouri Bot. Gard. xix. 119 (1908). — Macra- 



canthae. — Missouri, Arkansas (type locality: Webb City, Mo.), 

 obstipa Sargent in N. Y. State Mus. Bull, clxvii. 80 (1913). — Prul- 



nosae. — New York (type locality: Chapinville). 

 obtecta Ashe in Bot. Gaz. xxxiii. 233 (1902). — Molles. — Illinois (type 



locality not given). (?) 



occidentalis Britton in Bull. N. Y. Bot. Gard. I. 448 (1900) = C. sue- 



culenta Scbrad.? 

 ogdensburgensis Sargent in N. Y. State Mus. Bull, clxvii. 123 (1913). 



Macracanthae. — New York (type locality: Ogdensburg). 

 ohioensis Sargent in Jour. Arnold Arb. in. 183 (1922). — Crus-galli. 



Ohio (type locality: Columbus), 

 olida Ashe in Jour. Elisha Mitchell Sci. Soc. xx. 56 (1904). — Coc- 



cineae. — Pennsylvania (type locality: Pyler Falls). 

 olivacea Sargent in Proc. Acad. Nat. Sci. Phila. lxii. 153 (1910) = C. 



Fontanesiana Steud. 



onusta Ashe in Jour. Elisha Mitchell Sci. Soc. xix. 22 (1903).— Prui- 



nosae. — Ohio (type locality: Mansfield), 

 opaca Hooker & Arnott in Comp. Bot. Mag. i. 25 (1835). — Aesti- 



vales. — Alabama, Mississippi, Louisiana, Texas (type locality not 



given). 



operta Ashe in Jour. Elisha Mitchell Sci. Soc. xix. 29 (1903). — Crus- 

 galli. — North Carolina, Tennessee (type locality not given). (?) 



opica Ashe in Jour. Elisha Mitchell Sci. Soc. xix. 10 (1903). — Macra- 

 canthae. — Pennsylvania (type locality: Berks County). 



opima Beadle in Biltmore Bot. Studies, i. 40 (1901). — Pulcherrimae. — ■ 

 Alabama, Florida (type locality: Greenville, Ala.). 



opulens Sargent in Proc. Rochester Acad. Sci. iv. 104 (1903). — Silvi- 



colae. — New York, Michigan (type locality: Rochester, N. Y.). 



ornata Sargent in Proc. Rochester Acad. Sci. iv. 120 (1903). — Tenui- 



foliae. — Ontario, New York (type locality: Rochester, N. Y.). 



otiosa Ashe in Jour. Elisha Mitchell Sci. Soc. xx. 48 (1904). — Tenui- 



foliae. — Michigan, Ohio (type locality: Summerville, Mich.). 



ovalifolia Hornemann, Hort. Hafn. Suppl. 52 (1819), ex Sudworth, U. S. 



Dept. Agric. Div. For. xiv. 217 (1897), as synonym of C. crus- 

 galli prunelh 'folia Sudw. = C. prunifolia Pers.? 



ovata Sargent, Man. Trees N. Am. 402 (1905). — Virides. — Illinois, 



Missouri (type locality: Carondelet, Mo.). 



ovatifolia Sargent in N. Y. State Mus. Bull. cxxn. 92 (1908).— Prui- 



nosae. — New York (type locality: Coopers Plains). 



