26 EOSACEAE. 



base; leaves of the new stems not seen: flowering branches 1 dm. long or less, 

 villous: leaves 3-f oliolate; blades of the leaflets broadly obovate or ovate, 

 finely and simply serrate with broad triangular teeth, closely villous-tomentose 

 beneath, sparingly hairy or glabrate above: inflorescence corymbose, few- 

 flowered: sepals ovate, mucronate, villous or tomentose without, tomentulose 

 within: petals white, obovate, 10-12 mm. long. 

 Dry woods and fields, e. Fla. (Cont.) 



5. R. lucidus Eydb. Stems biennial or perennial (?), trailing, 1-2 m. long, 

 terete, rather slender, armed with recurved, flattened prickles: leaves of the 

 new stems mostly 5-foliolate, persistent, somewhat leathery in age; blades of 

 the leaflets lanceolate, acute, glabrous on both sides, regularly serrate, dark- 

 green and shining above, paler beneath: floral branches 1-2 dm., rarely 3 dm. 

 long, erect, sparingly pubescent or glabrate: leaves 3-foliolate; blades of the 

 leaflets oblanceolate : flowers in terminal 2-6-flowered corymbs: peduncles and 

 pedicels sparingly pubescent and decidedly prickly : petals obovate, white, 12-15 

 cm. long: fruit elongate, rather dry. 



Open woods, n. Fla. and the upper pen. (Cont.) 



6. R. trivialis Michx. Stems biennial, prostrate and trailing, 5-20 dm. long, 

 slender, terete, more or less hispid and with small, slightly flattened prickles: 

 leaves of the new stems 3-5-f oliolate, persistent ; blades of the leaflets glabrous, 

 subcoriaceous, ovate or oblanceolate, sharply serrate, dark-green and shining 

 above, paler and duller beneath: leaves of the erect flowering branches 3- 

 f oliolate; blades of the leaflets smaller, more elliptic or oval, rounded or obtuse 

 at the apex: flowers terminal, mostly solitary: peduncles 2-5 cm. long, more 

 or less tomentulose and prickly: petals white, obovate, 10-15 mm. long: fruit 

 usually oblong, black. 



Thickets, open woods, and fields, n. and pen. Fla. (Cont.) 



3. ROSA [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. Spr.-sum. ROSE. 



Styles much exserted, united, about equalling the stamens : stipules adnate : sepals 



reflexed, deciduous. 1. R. setiyera. 



Styles not exserted, or only slightly so, distinct : stigmas form- 

 ing a head closing the mouth of the hypanthium. 

 Stipules almost free from the petiole : introduced climbers or 



trailers. 

 Stipules small, entire : leaflets 3-5 : plants with glabrous 



branches. 2. R. laevigata. 



Stipules pectinate : leaflets 7-9 : plants with pubescent 



branches. 3. R. bracteata. 



Stipules adnate to the petiole : native erect or diffuse plants. 

 Infrastipular prickles decidedly curved. 



Leaflets mostly 7 : flowers usually corymbose on erect 



branches : fruits about 12 mm. thick. 4. R. palustns. 



Leaflets mostly 5 : flowers usually solitary or 2 together 



on spreading branches : fruits 8-9 mm. thick. 5. R. floridana. 



Infrastipular prickles straight or nearly so. 



Leaflets 5-7, subcoriaceous : fruits 8-10 mm. thick. 6, R. lancifolia. 



Leaflets mostly 5, membranous : fruits 10-15 mm. thick. 



Leaflets with non-glandular teeth. 7. R. Carolina. 



Leaflets with glandular teeth. 8. R. serrulata. 



1. R. setigera Michx. Stems 2-5 m. high, climbing, glabrous, armed with 

 scattered, curved, flattened prickles: leaflets 3, or on the new shoots some- 

 times 5, the median long-petiolulate, the lateral ones nearly sessile; blades 

 lanceolate, or rarely ovate, 4-9 cm. long, dark-green, glabrous and shining 

 above, pale and glabrous beneath: flowers corymbose: pedicels glandular- 

 hispid: hypanthium globose or rounded-ellipsoid, more or less glandular-hispid, 



