47. Crataegus Jesupi Sargent. Jesup's Thorn

Fig. 2381

Crataegus Jesupi Sarg. Rhodora 5: 61. 1903.

A large shrub, sometimes 200 high, with ascending branches. Leaves elliptic-ovate, 1 1/2'-3' long, 1'-2' wide, acute or acuminate at the apex, broadly cuneate to truncate-cordate, serrate or doubly serrate with 4 or 5 pairs of acute lobes, yellow-green above, paler beneath, glabrous; corymbs glabrous; flowers about 10" broad, calyx-lobes entire; stamens about 10; anthers dark red; styles and nutlets usually 3 or 4; fruit short-ellipsoid to pyriform, about 5" thick, dark red, slightly angled, devoid of bloom when mature; calyx-lobes mostly deciduous; flesh firm at maturity.

Western Vermont to southwestern Wisconsin, south to Pennsylvania. May; fruit ripe October.

48. Crataegus Rugòsa Ashe. Fretz's Thorn

Fig. 2382

C. rugosa Ashe, Journ. E. Mitch. Soc. 171: 5. 1900. C. deltoides Ashe, Journ. E. Mitch. Soc. 172: 19. 1901. C. rustica Beadle, Bilt. Bot. Stud, 12: 122. 1902.

A shrub or tree, sometimes 200 high, with ascending branches. Leaves broadly ovate, 1'-2 3/4' long, 1'-2 3/4' 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 5; fruit depressed-globose, bright red, 5"-8" thick; flesh rather succulent when mature.

Southwestern New England to Pennsylvania, Indiana and the mountains of North Carolina. May; fruit ripe October.

48 Crataegus Rug Sa Ashe Fretz s Thorn 724

49. Crataegus Filipes Ashe. Miss Beckwith's Thorn

Fig. 2383

C. filipes Ashe, Journ. E. Mitch. Soc. 191: 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. 202: 50. 1904. C. Robbinsiana Sarg. Rhodora 7: 197. 1905. Not Crataegus silvicola Beadle, Bot. Gaz. 28: 414. 1899.

A shrub or tree, sometimes 300 high, with ascending branches. Spines numerous, 1'-2 1/2' long; leaves ovate, 3/4'-2 3/4' long, 3/4'-2 1/2' 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 10" 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.

49 Crataegus Filipes Ashe Miss Beckwith s Thorn 725

50. Crataegus Leiophılla 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 15o high, with erect branches, and numerous thorns 1-2 1/2' long. Leaves broadly ovate, 1 1/4'-2 3/4' 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; stamens 10-20; anthers pink or yellow; styles and nutlets 4 or 5; 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.

50 Crataegus Leioph Lla Sargent Maine s Thorn 726