i62 



BOSAOEAE (KOSE FAMILY) 



e. Coiymbs many-flowered. 



Leaves bi'oadest toward the apex ......... nos. 5, 10, 49 



Leaves broadest at the middle. 



Calyx-lobes serrate ; nutlets plane • . . • no. 8, § 8 



Calyx-lobes deeply serrate ; nutlets pitted § 16, § IT 



Leaves broadest toward the base. 



Leaves glabrous nos. 32, 88, and § 12 



Leaves pubescent § 18, § 14 



§ 1. OXYACAntHAE Loud. Leaves ovate, S-lS-lobed or -cleft, acute at the 

 apex, cuiieate to truncate at the base, serrate, 1-4 cm. long, 1^.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 1.6 cm. wide ; calyx lobes deltoid, entire, obtuse ; stamens about 

 20 ; anthers pink; styles 1-2 ; fruit globose or subglobose, red, about 6 mm. 

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

 usually 1 ; shrubs or small trees, 6-9 to. tall, with strongly ascending 

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



1. C. OxYAoiNTHA L. (English H.) Characters of the section. — Sparingly 

 escaped from cultivation. Fl. May ; fr. Sept. (Introd. from Eu.) 



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

 and shining above, acute or rounded at the apex, cuiieate 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 6), strongly ridged on the back; trees or shrubs, usually with 

 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 2-10 cm. long, 1-4 cm. wide ; nest of 1-2 nutlets longer than thick . 2. C, Gpus-gatU. 

 Leaves 2-6 cm. long, 2-5 cm. wide. 



Nutlets 2-3 ; nest of nutlets about as long as thick 8. {7. pratensit. 



Nutlets 3-5 ; nest of nutlets longer than thick i. C. Caji^yi. 



Corymbs and leaves hairy. 



Leaves large, 8-9 cm. long, 2-7 cm. wide 5. <7. fecunda. 



Leaves small, 2—6 cm. long, 1—4 cm. wide 6. {7. berberifolia. 



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

 cept toward the base ; corymbs 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, 3.6-4.5 mm. 

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

 plain, Nantucket, Mass. (where probably intro- 

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

 Out., B. Mich., s. e. Kan., and s. to Ga. Fig. 

 7(!9. Var. pyracanthif6lia Ait. has more 

 acute leaves and small bright red fruit. — Occa- 

 sional, n. Del. to 0. Var. oblongXta Sarg. 

 Iruit ellipsoidal, bright red ; nutlsts acute. — 

 Del. and e. Pa. Var. capillXta Sarg. Leaves 

 thinner ; corymbs slightly pubescent ; nutlets 

 solitary. — Wilmington, Del. Var. ExfGDA 

 (Sarg.) Eggleston. Fruit ellipsoidal, bright 

 crimson ; nutlets solitary. — Ct. Var. pbuni- 

 f6i.ia (Poir.) T. & G. Leaves sometimes 7 cm. 

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

 Fl. May, June ; fr. Oct. 



C. Crus-gdlli x macracintha Eggleston. 

 Broad-leaved forms with foliage as in var. 

 pruiiifolia, the corymbs pubescent, the oalyx- 

 lobcs serrate, the nutlets 2-.",, their pits varying 



Orus-falll. 



