152 EOSACEAE. 



elliptic: sepals mostly acute: petals mostly 2-2.5 mm. long: mature hypan- 

 thium-body about 3 nun. wide. — Occasional^ in woods and on dry banks. — Sum. 



5. A. rostellata Wallr. Stems nearly glabrous or sparingly loose-pubescent: 

 lower leaves witli 3-9;, usually 5, primary leaflets: sepals acute or obtuse: 

 corolla 4-6 mm. wide: mature hypanthium turbinate, 2.5-3 mm. long. — S. 

 Rather common, in low thickets and fence rows. — Schists. — Sum. 



6. A. gryposepola Wallr. Stems with spreading hairs: lower leaves with 5-9, 

 usually 7, primary leaflets: sei^als acuminate: corolla 8-12 mm. wide: mature 

 hypanthium broadly turbinate, 5-6 mm. long. — Common, in thickets. — Sum. 



15. SANGUISORBA [Eupp.] L. Perennial, or rarely annual, caulescent 

 herbs. Leaf-blades unequally pinnate. Flowers in dense heads or spikes. 

 Hypanthium angled, unarmed. Sepals petal-like, deciduous. Petals wanting. 

 Filaments mostly clavate. 



1. S. canadensis L. Plants 3-4 dm. tall: leaflets 7-15; blades oblong, ovate- 

 oblong, or oblong-lanceolate, 1.5-8 cm. long, serrate: spikes 3-15 cm. long: 

 sepals oval or oval-ovate, varying to oblong or cuneate, about 2 mm. long, 

 mucronate : achenes about 3 mm. long. — Not very common, in swamps. — 

 Sum. — Burnet. 



16. BOSA [Tourn.] L. Prickly shrubs, sometimes vine-like. Leaf-blades 

 unequally pinnate. Flowers solitary or in corymbs, often showy. Hypanthium 

 urceolate. Sepals more or less foliaceous. Petals 5, broad. Stamens many. 

 Fruits enclosed in the pulpy hypanthium. — Sum. — EosE. 



Sepals persistent and erect : stems and branches unarmed or nearly so, except the 



bristly shoots. 1. R. Solauderi. 



Sepals deciduous, or if persistent, spreading or recurved : stem 

 and branches prickle-armed. 

 Achenes borne only on the bottom of the hypanthium : shoots 

 bristly : prickles infrastipular. 

 Bades of the leaflets serrulate : prickles short and curved. 2. R. palustris. 

 Blades of the leaflets serrate, often coarsely so : prickles 

 straight, or if curved, elongate. 

 Flowers solitary or nearly so : leaflets 5-7 : spines 



slender, straight. 3. R. Carolina. 



Flowers corymbose : leaflets 7-9 : spines stout, often 



curved. 4. R. viryiniana. 



Achenes borne on the sides and on the bottom of the hypan- 

 thium : shoots prickly : spines scattered. 

 Styles pubescent : fruits globular to oval. 5. R. ruMginosa. 



Styles glabrous : fruits ovoid to flask-shaped. 6. R. micrantha. 



1. R. Solanderi Tratt. Bushy shrub 1.5 m. tall or less, the prickles wanting or 

 few and small: leaflets 5-7; blades thickish, oblong to oblong-lanceolate or 

 broadest above the middle, mostly 2-3 cm. long, serrate, often slightly pubes- 

 cent beneath: flowers in corymbs, or solitary: hypanthium glaucous, sometimes 

 slightly bristly: sepals narrowly lanceolate, more or less dilated at the apex, 

 hispid, persistent: fruits depressed, 1-2 cm. in diameter, red. [B. hlanda Lindl. 

 Not Ait.] — Susquehanna valley. Eare, in moist places. 



2. E. palustris Marsh. Bushy shrub 1-3 m. tall, the prickles stout, recurved: 

 leaflets 5-9, commonly 7; blades membranous, elliptic to elliptic-obovate or 

 oblanceolate, 2.5-7 cm. long, acute or obtuse at the apex, serrulate, gla- 

 brous, or pubescent beneath: flowers in terminal corymbs or rarely solitary: 

 hypanthium glandular: sepals lanceolate or linear-lanceolate, acuminate, often 

 dilated at the apex, rarely lobed, spreading or reflexed at maturity, deciduous: 

 fruits subglobose or depressed, 7-9 mm. in diameter, red, more or less glandu- 

 lar. [B. Carolina L. 2 ed. Sp. PI.] — Common, in low thickets and swamps. 



3. K. Carolina L. Bushy shrub 2-24 dm. tall, the prickles straight: leaflets 

 5-7, usually 5; blades rather leathery, elliptic, oval, or ovate-lanceolate, or 



