ROSACEAE. 97 



spines ; small continuous pith ; alternate slightly-raised crescent- 

 shaped leaf-scars with 3 bundle-traces ; scarcely evident stipule- 

 scars ; sessile ovoid pointed appressed buds with several exposed 

 scales ; rather small lanceolate slender-petioled leaves ; small 

 perfect corymbed polypetalous epigynous white flowers ; and 

 small typically red pomes with 2-seeded bony core-cavities. 

 Often placed in Crataegus. 

 Leaves acute at both ends, low-crenate. P. coccinea. 



RHODOTYPOS. 



Deciduous shrubs with slender terete twigs ; relatively large 

 round continuous white pith ; opposite somewhat raised triangu- 

 lar or 3-lobed leaf-scars with 3 bundle-traces; no stipule-scars; 

 ovoid sessile buds with some 3 pairs of exposed scales; large 

 thin wrinkled petioled leaves ; few relatively large perfect poly- 

 petalous perigynous white flowers ending the branches ; and 

 fruit of about 5 black drupes in each enlarged calyx. The buds 

 are often collaterally multiplied. 

 Leaves ovate, acuminate, doubly serrate. ' R. kerrioides. 



KERRIA. "Corchorus." 



Rather small deciduous shrubs with slender angled green 

 twigs ; rounded homogeneous pale pith ; alternate 2-ranked some- 

 what raised triangular or transverse leaf-scars with 3 bundle- 

 traces ; no stipule-scars ; solitary sessile ovoid appressed buds 

 with four or five rather loose ciliate scales ; simple, doubly 

 toothed moderately large short-stalked leaves ; perfect rather 

 large perigynous yellow flowers ending the branches ; and sev- 

 eral small akenes in each persistent calyx. 



1. Unvariegated. 2. 

 Variegated. 3. 



2. Flowers single. K. japonica. 

 Flowers double. K. japonica flore-pleno. 



3. Twigs striped with yellow. K. japonica vittato-ramosa. 

 Twigs green. 4. 



4. Leaves striped with yellow. K. japonica aureo-vittata. 

 Leaves edged with white. K. japonica argenteo-variegata. 



