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 r 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, '-2!' long, \'-2\' 

 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, 5"-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 collina Chapman. Chapman's Hill Thorn. Fig. 2347. 



Crataegus collina Chapm. Fl. So. U. S. Ed. 2, suppl. 2. 



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'-2i' 

 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, t'-2i' long, i'-a' 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. 1912. 1836. 

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



Brit. 2: 819. 1838. 

 Crataegus occidentalis Britton, Bull. N. Y. Bot. Card, 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'-2i' 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. 



