ROSACEAE (ROSE FAMILY) 463 



from shallow to deep, have all the appearance of natural hybrids between these 

 two species. (C. persimilis Sarg. ; C. prunifolia of European gardens, in part ^ 

 — Occasional. ' ^ •>' 



3. C. prat6nsis Sarg. Leaves ovate-orbicular, 2-6 cm. long, 2-5 cm wide 

 coarsely or doubly serrate ; flowers about 1 cm. wide ; calyx-lobes remotely 

 glandular-serrate, glabrous ; stamens about 10 ; anthers yellow or pink ; styles 

 2-3 ; fruit short-ovoid to compressed-globose, dull reddish-green ; flesh somewhat 

 succulent, mealy, yellow ; iiutlets 2-3, about 5 mm. long; nest of nutlets about 

 mm. thick. (C. Falmeri Sarg.; C. grandis Ashe.)— Low rich soil 111 and 

 Mo. Fl. May ; fr. Oct. 



4. C. Canbyi Sarg. Leaves oblong-obovate, 2.5-8 cm. long, 2-6 cm. wide 

 doubly serrate; often lobed toward the apex; corymbs glabrous; flowers about 

 1.5 cm. wide; styles 3-5; fruit short-ellipsoidal to globose, 1-1.5 tm long 

 dark crimson; flesh bright red, succulent ; the :^5 nutlets 7-8 mm. long • nest 

 of nutlets 6-7 mm. thick. (C. Pennypackeri Sarg.) — Occasional, e. Ta and 

 Md. Fl. May ; fr. Oct. 



_ 5. C. feciinda Sarg. Leaves oblong-obovate to oval, 3-9 cm. long, 2-^7 cm. 

 wide, doubly serrate, the veins strongly marked ; corymbs slightly villous ; 

 flowers about 2 cm. icide ; calyx-lobes co&rse]y glandular-serrate ; stamens about 

 10 ; anthers purple ; styles 2-4 ; fruit short-ellipsoid to subglobose, 2-2.5 cm. 

 long, orange-red, slightly pubescent; calyx-lobes erect; flesh thick; nutlets 

 usually 2-3, 8-10 mm. long; nest of nutlets 8-10 mm. thick. — Rich bottom 

 lands, s. w. Ind. to s. e. Mo. Fl. May; fr. Oct. 



6. C. berberifolia T. & G. Leaves oblong-cuneiform, spatulate, or obovate, 

 2-6 cm. long, 1-4 cm. wide, rounded or acute and serrate toward the apex, 

 rough-pubescent above, white-pubescent or -tomentose beneath; petioles 1 cm.' 

 long, densely tomentose ; corymbs densely villous ; flowers about 1.6 cm. wide ; 

 calyx-lobes slightly villous; stamens about 20; anthers yellow; styles 2-3; 

 fruit subglobose, about 1 cm. thick, orange or red, &\\g\it\y pubescent ; flesh 

 yellow; nutlets 2-3, about 6 mm. long; nest of nutlets about mm. thick.— 

 Gulf States. — A specimen from Mercersburg, Pa. {Porter) appears intermediate 

 between this and the following. 



Var. Engelmanni (Sarg.) Eggleston. Less pubescent ; stamens about 10 ; 

 anthers pink, — Va. and Mo. Fl. May; fr. Oct. 



§ 3. PUNCTAtAE Loud. Leaves obovate to oblong, impressed-veined and 

 usually rather dull above, mostly piibescent leneaih particularly along the 

 veins, acute or acuminate at the apex, sharply luneate at the base, serrate, 

 doubly serrate, or slightly lobed, but nearly entire toicard the base, subcoria- 

 ceous; petioles 1-2 cm. long, slightly winged above ; corymbs many-floicered ; 

 calyx-lobes lanceolate-acuminate, entire or sometimes glandular-margined; 

 stamens 10-20; styles 2-6; fruit green, yellow, or red ; flesh hard, thick; 

 calyx usually flattened ; nutlets 2-5, ridged on the back ; flat-topped trees, 

 3-10 m. highi with grayish-brown bark; spines straight, 2-7 cm. long. 



Pruit ellipsoidal, glabrous ; nutlets usually 3-i. 



Leaves briffht yellow-green above ; nest of nutlets longer than thick . 7. C. paueiacn. 



Leaves dull gray-green above ; nest of nutlets about as long as thick . 8. C. punctata. 

 Fruit globose, glabrous or pubescent ; calyx somewhat prominent; nutlets 4-5. 



Fruit glabrous, green to scarlet; Canadian 9. C. snhorhicnlata. 



Fruit villous, red ; southern 10. C.collina. 



7. C. pausiaca Ashe. Leaves oblanceolate-obovate, 3-6 cm. long, 1.5-4 cm. 

 wide, dark vivid yellow-green and glabrous above ; corymbs pubescent ; flowers 

 1.2-1.5 cm. wide; calyx glabrous, its lobes slightly pubescent inside; slamens 

 10-15; anthers dark pink; fruit ellipsoidal-pyriform, about 8 mm. thick, dull 

 brick-red; flesh greenish-ye'llow ; nutlets usually 3, 7-10 mm. long; nest of 

 nutlets 6-10 mm. thick. — Abundant in Pa. — Intermediate between C. Crus- 

 gain and C. punctata, and to be expected wherever these two species are found. 

 V\. May ; fr. Oct. 



8. C. punctata Jacq. Leaves 2-8 cm. long, 1-5 cm. broad, dull gray-green 

 find strongly impressed-veined above ; corymbs tomentose : flowers about 2 cm. 



