64 ROSACEAE 



2. Fruit glabrous. 3. 

 Fruit pubescent. 4. 



3. Leaves green. P. opulifolius. 

 Leaves yellow. P. opulifolius luteus. 



4. Fruits much longer than the sepals. P. intermedius. 

 Fruits little longer than the sepals. P. amurensis. 



STEPHANANDBA. 



Deciduous low shrubs with slender terete twigs; round 

 continuous pith; alternate small low crescent-shaped leaf -scars 

 with a single compound bundle-trace; transverse stipule-scars; 

 sessile ovoid often superposed buds with several exposed scales; 

 ovate petioled lobed or toothed leaves; small perfect polypeta- 

 lous white flowers in terminal panicles; and small 1- or 2- 

 seeded capsules, dehiscent below. 



Leaves rather small (about 3 cm.), deeply lobed. S. incisa. 

 Leaves larger (often 7 cm.). S. Tanakae. 



SPIBAEA. 



Deciduous shrubs of small size or with slender wand-like 

 usually somewhat 5-angled branches, with roundish pale con- 

 tinuous pith; 5-ranked often pointed divergent buds with sev- 

 eral scales; small crescent-shaped somewhat raised leaf-scars 

 with a single bundle-trace; mostly lanceolate serrate occasion- 

 ally linear and entire or broad and sometimes lobed small 

 leaves often pale beneath; small white or rosy perfect poly- 

 petalous flowers in axillary clusters or forming elongated 

 panicles or compound corymbs; and a number of small usually 

 glabrous follicles in each persistent calyx. 



1. Leaves linear, (scarcely 5 mm. wide). S. Thunbergii. 

 Leaves lanceolate or oblanceolate. 2. 



Leaves ovate or rounded. 9. 



2. Leaves small (scarcely 10 X 30 mm.), 1-nerved. X S. arguta. 

 Leaves distinctly larger, veiny. 3. 



3. Leaves rhombic-lanceolate. X S. cantoniensis. 

 Leaves not rhombic. 4. 



