222 ROSACE.!:. 



I thought this simple Cowered plant to be a new species which lias a close 

 affinity to S. prunifolia SIEB. et Zucc. But I am quite convinced by Mr. T. 

 MAKING that the specimen is nothing but a simple flowered form of the 

 common Japanese species. Mr. PALIBIN has also written in his " Conspectus 

 Fl. Ivorese I. p. 73" that the Corean species has all simple flowers, while 

 those of Japan and China are all double flowered form. 



4. Rulncs Lixx. 

 DicJiotomoits Key fo the Formosan Species. 



(1) Leaves simple. (2) 

 Leaves compound. (15) 



(2) ) Leaves glabrous both sides or nearly so. (3) 



ft] Leaves hairy, sparingly, hairy or beset with soft hairs. (9) 



f) Leaves densely tomeutose, or covered with cottony wools, or with 



an adpressed cotteny white covering of wools, (sometimes glabrous 



only above.) (10) 



(3) Leaves oblong, never lobed, acuminate, rounded at the base, beset with 



cottony soft hairs along the veins on the under surface 



R. Kawakamii. 



Leaves more or less lobed. (4) 



(4) Leaves slightly lobed i.e. the terminal lobe longer than three times as 



long as the lateral ones. (5) 



Leaves distinctly lobed i.e. the terminal lobe less long than three times 

 as long as the lateral ones. (7) 



(5) Stipules linear, leaves quite glabrous Pi. retnsipetalns. 



Stipules lanceolate or oblong. (G) 



(f>) Stipules oblong dentate, leaves broadly ovate cuspidate at the apex 



1L Morii. 



Stipules lanceolate, entire, adnate to the petioles 



E. corcliorifoliiis var. glaber. 



(7) Calyx nearly black-coloured, nearly glabrous on the back, pubescent 

 on ly on the margin fi. caiiditplicata . 



