Genus 6. 



APPLE FAMILY, 



301 



12. Crataegus suborbiculata Sargent. Caughua- 

 waga Thorn. Fig. 2346. 



Crataegus suborbiculata Sarg. Rhodora 3: 72. 1901. 

 C. nitidula Sarg. Geol. Surv. Mich. 521. 1907. 

 C. Saundersiana Sarg. Ont. Nat. Sci. Bull. 4: 66. 1908. 

 C. Dewingii Sarg. Rep. N. Y. State Bot. 1907: 34. 1908. 



A small tree, sometimes 20° high, with spreading 

 branches and a broad crown. Spines ii'-2' long; leaves 

 ovate-orbicular, impressed-veined and dull dark green 

 above, glabrous, serrate or twice serrate, acute at the 

 apex, broadly cuneate at the base, ¥~2l' long, 5'-2l' 

 wide; corymbs glabrous; flowers about 10" broad; 

 stamens about 20, the anthers rose ; styles and nutlets 

 4 or 5 ; sepals slightly glandular-margined ; fruit glo- 

 bose or compressed-globose, s"-8" thick; dull green to 

 scarlet; calyx-tube somewhat prominent. 



Limestone areas, valley of the St. Lawrence and Great 

 Lakes from Montreal to southeastern Michigan. May-June ; 

 fruit ripe October. 



13. Crataegus coUina Chapman. Chapman's Hill Thorn. Fig. 2347. 



SUppl. 2. 



Crataegus coUina Chapm. Fl. So. U. S. Ed. 



684. 1892. 

 C. Lettermani Sarg. Bot. Gaz. 31 : 220. April 1901. 

 C. sordida Sarg. Bot. Gaz. 33: 114. Feb. 1902. 



A tree, sometimes 25° high, with spreading branches 

 and a flat-topped crown. Spines numerous, i'-2J' 

 long; leaves obovate or oblanceolate to oval, acute or 

 obtuse at the apex, strongly cuneate, serrate or doubly 

 serrate with obtuse lobes toward the apex, nearly 

 entire below, i'-2i' long, ¥-2' wide, subcoriaceous, yel- 

 low-green, somewhat pubescent when young ; corymbs 

 and calyx pubescent; flowers 7"-i2" broad; stamens 

 10-20 (commonly 20), the anthers usually yellow; 

 styles and nutlets 4 or 5 ; calyx-lobes glandular-ciliate 

 or glandular-serrate ; fruit globose or compressed- 

 globose, 5"-7" thick, red or orange-red; calyx-tube 

 somewhat prominent, the lobes reflexed. 



Virginia to Georgia, Missouri and Mississippi. April- 

 May ; fruit ripe October. 



14. Crataegus succulenta Schrader. Long-spined Thorn. Fig. 2348. 



C. succulenta Schrad. ; Link, Handb. 3: 78. 1831. 

 Crataegus glandulosa var. macracantha Lindl. Bot. Reg. 



22 : pi. i<)i2. 1836. 

 Crataegus macracantha var. minor Lodd. ; Loud. Arb. 



Brit. 2: 819. 1838. 

 Crataegus occidentalis Britton, Bull. N. Y. Bot. Gard. i : 



5 : 448. 1900. 

 Crataegus coloradensis A. Nelson, Proc. Biol. Soc. 



Wash. 17 : 175. 1904. 



A small tree, sometimes 25° high, with ascending 

 branches and a broad irregular crown. Spines 

 numerous, ii'-4' long; leaves rhombic-ovate to obo- 

 vate, ij'-3i' long, i'-24' wide, acute at the apex, 

 broadly cuneate at the base, serrate or doubly serrate 

 with fine teeth, often lobed towards the apex, cori- 

 aceous, dark shining green above, pubescent along the 

 veins beneath ; corymbs slightly villous ; flowers about 

 10" broad; calyx-lobes lanceolate, acuminate, glandu- 

 lar-laciniate, villous ; stamens 10-20, usually 10, the 

 anthers large, pink or occasionally yellow; styles 

 and nutlets usually 2 or 3 ; fruit subglobose, 3"-8" 

 thick, dark red, shining, villous; calyx-lobes reflexed; 

 flesh thin, glutinous. 



Nova Scotia to Minnesota, North Carolina and Nebraska, and in the Rocky Mountains to 

 southern Colorado. May ; fruit ripe September. 



