138 KOSACE.E. (ROSE FAMILY.) 



* * Styles distinct, included : flowers red or white. 



2. R. Carolina, L. Stem erect, smooth, armed with stout recurved 

 stipular prickles; leaflets 5-9, oblong or elliptical, acute, finely serrate, dull 

 aud smoothish above, the lower surface paler, or, like the prickly petioles and 

 caudate calyx lobes, tomeutose ; flowers single or corymbose; calyx tube and 

 peduucles glandular-hispid. Swamps. June. Stem 4 6 high, com- 

 monly purplish. Fruit depressed-globose, glaudular. 



3. R. humilis, Marsh. Stem low, erect, armed with bristles and stout 

 stipular prickles ; leaflets mostly 5, elliptical or oblong-lanceolate, sharply ser- 

 rate, smooth and shining above, paler aud often somewhat pubescent beneath ; 

 flowers solitary, or 2 - 3 together ; peduncles and calyx glandular, the latter 

 with foliaceous, often incised lobes. (R. parviflora, Ell.) Mostly in dry 

 soil, common. May- June. Stem 1- 3 high. A variable species. Stem 

 sometimes spineless. 



4. R. rubiginosa, L. (EGLANTINE.) Stem erect or curving, armed 

 with very stout prickles; leaflets 5-7, oval or obovate, serrate, glandular be- 

 neath; flowers mostly solitary, on hispid peduncles; fruit obovate. (R. 

 suaveoleus, Pursh.) Waste places. Introduced. Branches yellowish green. 

 Leaves fragrant. 



6. R. laevigata, Michx. (CHEROKEE ROSE.) Stem long, trailing, 

 smooth, the branches armed with very stout and curved prickles, leaves ever- 

 greeu, mostly trif oliolate ; leaflets smooth and shining, lanceolate, the midrib 

 hispid ; stipules deciduous ; flowers large, solitary, white ; calyx very bristly. 

 Common iu cultivation. 



16. CRAT^IGUS, L. HAWTHORN. 



Calyx urn-shaped ; the limb 5-cleft, persistent. Petals 5, orbicular, con- 

 cave. Stamens few or many. Styles 1-5, distinct. Fruit fleshy, containing 

 1-5 bony nutlets. Thorny shrubs or trees. Leaves simple, serrate or vari- 

 ously lobed. Flowers white, axillary and solitary, or in corymbs terminating 

 short lateral branches. Stipules on the young branches linear, or lunate and 



serrate. 



* Corymbs compound, many-flowered. 



*- Fruit small, not larger than n pea. 



1. C. spathulata, Michx. Young branches tomentose, otherwise nearly 

 smooth and glandless throughout ; leaves small, spatulate, creuate at the sum- 

 mit ; those on the young shoots larger and iucisely lobed ; calyx lobes very 

 short; stvles 5; fruit very small, red. River banks, April. A small tree. 

 Corvmbs sometimes slightly pubescent. Stipules lunate on the young 

 branches. 



2. C. apiifolia, Michx. Young branches, leaves, and corrmbs whitened 

 with soft hairs; leaves small, deltoid, piunately 5-7-lobed, sharply toothed, 

 nearly smooth when old, truncate or cordate at the base ; styles 1 -3, filiform ; 

 fruit globular, red. River swamps. March - April. A small tree. Leaves 

 i'- 1'long. 



3. C. COrdata, Ait. Young branches, leaves, and corymbs softly pubes- 

 cent, soon smoothish ; leaves deltoid-ovate, truncate or cordnte nt the bnse, 



