462 



ROSACEAE (liOSE FAMILY) 



c. 



Corymbs many-flowered. 



Leaves broatlest toward the apex . 

 Leaves broadest at the middle. 



Calyx-lobes serrate ; nutlets plane . , 



Calyx-lobes deei)ly serrate ; nutlets pitted 

 Leaves broadest toward the base. 



Leaves glabrous 



Leaves pubescent .... 



no8. B, 10, 49 



. no. 3, § 8 

 . §16, §17 



nos. 32, 33, and § 12 

 . . . §13, §14 



5 L OXYACAntHAE Loud. Leaves ovate, o-lo-Iobed or -cleft, acute at the 

 apex, cuneate to truncate at the base, serrate, 1-4 cm. long, 1-4.5 cm. wide, 

 dark green and glabrous above {when mature) , paler and slightly pubescent 

 beneath {especially along the veins); corymbs many-flowered, glabrous; 

 flowers about l.«) cm. icide ; calyx lobes deltoid, entire, obtuse ; stamens about 

 '20 ; anthers pink ; styles 1-2 ; fruit globose or subglobose, red, about mm. 

 thick; calyx-lobes reflexed, persistent ; flesh of fruit yellow, mealy; nutlets 

 usually 1 ; shrubs or small trees, 6-1) m. tall, vnth strongly ascending 

 branches and dark brown scaly bark ; thorns sharp, about 1 cm. long. 



1. C. OxYACANTHA L. (ENGLISH IL) Characters of tliG sectioii. ^ — ^Sparingly 

 3.scaped from cultivation. Fl. iNIay ; Ir. 8ept. (Iiitrod. from Eu.) ' 



§ 2. CRUS-GALLI Loud. Leaves obovate to elliptical, coriaceous, dark green 

 and shining above, acute or roiuuh^d at the apex, cuneate at the base; 

 petiole slightly winged above, glandless, 1-2 cm. long ; corymbs many- 

 flowered ; calyx-lobes lanceolate-acuminate, usually entire ; stamens 10-20; 

 anthers usually pink; fruit subcylindric-ovoid to globose, red, the calyx 

 flattened and the flesh hard, thin, greenish; nutlets 1-3 {in no. 4 sometimes 

 as many as 5), strongly ridged on the back; trees or shrubs, usually loith 

 spreading branches forming a broad crown; bark dark gray, scaly ; spines 

 many, strong, straight, chestnut-brown, 3-18 cm. long. 



Corymbs and leaves glabrous. 



Leaves 'i-lO cm. long. 1-4 cm. wide; nest of 1-2 nutlets longer than thick . 2. C. Crus-gadi 

 Leaves 2-0 cm. long. •!-'> cm. Avide. 



Nutlets 2-3 ; nest of nutlets about as long as thick .... 



Xutlets :3-5 ; nest of nutlets longer than thick 



Corymbs and leaves hairy. 



Leaves large, 3-9 cm. long, 2-T cm. wide 



Leaves small, 2—6 cm. long, 1-4 cm. wide 



3. C. praieuaia. 



4. C. Canbyi. 



5. C. feeimda. 



6. C. berherifolia. 



2. C. Crus-galli L. Leaves 2-10 cm., long, 1-4 cm. wide, sharply serrate ex- 

 cept towartl the base ; cory nibs glabrous ; flowers about 1.5 cm. wide; calyx-lobes 

 glabrous or slightly pubescent ; stamens about 10 ; styles 1-3 ; fruit ellipsoidal- 

 ovoid to subglobose, about 1 cm. thick, greenish to dull red ; flesh hard and dry ; 



nutlets usually 2, 8-9 mm. long, 3.5-4.5 mm. 

 thick. — Sandy soil, near Montreal, L. Cliam- 

 plain, Nantucket, Mass. (where probably intro« 

 duced), Ct., the lower Hudson Valley to s. 

 Ont., s. Mich., s. e. Kan., and s. to Ga. Fic 

 709. Var. pvhacanthifolia Ait. has more 

 acute leaves and small bright red fruit. — Occa- 



oblongata 



nutlets acute 



Sarg. 



Leaves 

 nutlets 



EXfGUA 



briii^ht 



I'HINI- 



sional, n. Del. to O. Var. 



Fruit ellipsoidal, bright red 

 Del. and e. Pa. Var. cai>ill\ta Sarg. 

 thinner ; corymbs slightly pubescent ; 

 solitary, — Wilmington, Del. Var. 

 (Sarg.) Egf^leston. Fruit ellipsoidal 

 crimson ; nutlets solitary. — Ct. ^\T.r. 

 FOLIA (Poir.") T. & G. I>eaves sometimes 7 cm. 

 wide. {C. Bnrtramiana Sarg.) — Occasional. 

 Fl. May, Jnnc : fr. Dct. 



C. Crus-gAlli X macracantha Eggleston. 

 Broad -leaved forms with foliage as in var. 

 prunifolia. the coryml)s pubescent, the calyx- 

 lobes serrate, the nutlets 2—'], their jiits varying 



