SAXIFRAGACEAE. 



77 



DEUTZIA. 

 (Family Saxifragaceae). 



Usually small and slender- 

 branched shrubs with exfoliating 

 bark: deciduous as to our species. 

 Twigs round, often stellate-pubes- 

 cent, usually floriferous or dying 

 back at the end: pith moderate, 

 round, pale and spongy or brown 

 and excavated between the nodes. 

 Buds solitary or collaterally 

 branching, nearly sessile, com- 

 pressed-ovoid or triangular-oblong, 

 with 2-6 pairs of exposed scales. 

 Leaf-scars opposite or exceptional- 

 ly whorled, triangular or trans- 

 versely elongated, slightly raised, 

 connected by transverse ridges: 

 bundle-traces 3: stipule-scars lack- 

 ing. 



Though the deutzias are some- 

 what difficult to name by ordi- 

 nary characters except when in 



flower, the species most commonly seen differ rather markedly 

 in pith and bud, so that they are quite as readily known in 

 winter as at other seasons. References under Schizophragma. 



1. Pith brown, excavated. (1). D. scabra. 

 Pith white, spongy. 2. 



2. Buds canescent, ovoid: scales acute. (2). D. parviflora. 

 Buds glabrate, brown or straw-colored: scales attenuate. 3. 



3. Buds ovoid, longer than their lowest scales. 



(3). X D - Lemoinei. 

 Buds triangular-oblong, with long scales. 4. 



4. Leaf-scars triangular. D. rosea. 

 Leaf-scars linear. (4.) D. gracilis. 



