Genus 6. 



APPLE FAMILY. 



313 



48. Crataegus rugosa Ashe. 

 Fig. 2382. 



Fretz's Thorn. 



C. rugosa Ashe, Journ. E. Mitch. Soc. if : 5. 1900. 

 C. deltoides Ashe, Journ. E. Mitch. Soc. 17=: 19. 1901 

 C. rustica Beadle, Bilt. Bot. Stud, i": 122. 1902. 



A shrub or tree, sometimes 20° liigh, with ascending 

 branches. Leaves broadly ovate, i'-2i' long, i'-2|' wide, 

 acute or acuminate at the apex, cordate or truncate at 

 the base, serrate or twice serrate with 4-6 pairs of 

 broad acuminate lobes, membranous, glabrous ; corymbs 

 glabrous; flowers about 10" broad; stamens 10-20; 

 anthers pink; styles and nutlets usually 4 or S ; fruit 

 depressed-globose, bright red, s"-8" thick; flesh rather 

 succulent when mature. 



Southwestern New England to Pennsylvania, Indiana and 

 the mountains of North Carolina. May ; fruit ripe October. 



49. Crataegus filipes Ashe. Miss Beckwith's Thorn, Fig. 2383. 



C. filipes Ashe, Journ. E. Mitch. Soc. 19': 18. April 1903. 

 C. opulens Sarg. Proc. Roch. Acad. Sci. 4: 104. June 1903. 

 C. Beckwithae Sarg. Proc. Roch. Acad. Sci. 4: 124. June 



1903. 

 C. sequax Ashe, Journ. E. Mitch. Soc. 20': 50. 1904. 

 C. ifofefci'iiiiana Sarg. Rhodora 7 : 197. 1905. ^ot Crataegus 



silvicola Beadle, Bot. Gaz. 28: 414. 1899. 



A shrub or tree, sometimes 30° high, with ascending 

 branches. Spines numerous, i'-2i' long; leaves ovate, 

 f'-2i' long, i'-22' wide, acute or acuminate at the apex, 

 rounded, truncate and in vegetative shoots strongly 

 cordate at the base, serrate or twice serrate and lobed, 

 the lower pair of acuminate lobes often deeply cut, 

 membranous, glabrous; corymbs glabrous; flowers about 

 id" broad; stamens about 10; anthers pink; styles and 

 nutlets 3-5 ; fruit globose or compressed-globose, cherry- 

 red, 6"-8" thick. 



Western New England to central Michigan and south to 

 Pennsylvania. May ; fruit ripe October. 



50. Crataegus leiophylla Sargent. Maine's Thorn. Fig. 2384. 



C. leiophylla Sarg. Proc. Roch. Acad. Sci. 4: 99. 1903. 

 C Maineanai Sarg. Proc. Roch, Acad. Sci. 4: 106. 1903. 

 C.duracina-Sarg. Proc. Acad. Nat. Sci. Phil. 62 : 186. 1910. 



A large shrub, sometimes 15° high, with erect 

 branches, and .numerous, thorns l'-2i' long. Leaves 

 broadly ovate, iV-2¥ long" and wide, acute or-acuminate 

 at the apex, broadly cuneate to truncate at the base, 

 doubly serrate, with 3-5 pairs of acuminate spreading 

 lobes, blue-green above, paler beneath, subcoriaceous, 

 dull ; corymbs glabrous ; flowers about 10" broad ; sta- 

 mens 10-20; anthers pink or yellow; styles and nutlets 

 4 or s; fruit pyriform to globose, slightly angular, 6" 

 or 7" thick, dark green becoming bright or dark scarlet, 

 slightly pruinose ; flesh hard at maturity. 



Central and western New York to Pennsylvania. May ; 

 fruit ripe October. 



