ROSACEAE. 



Subfam. POMOIDEAE. 



Determined by Alfred Rehder. 



PYRUS L. 



Pyrus serotina Rehder in Proc, Am. Acad. L. 231 (1915). 



Western Hupeh: Hsing-shan Hsien, woodlands, alt. 1300-2000 

 m., May and December 1907 (No. 479% type); same locality, May 

 and October 1907 (No. 2977); Patung Hsien, thickets, alt. 1000-1600 

 m., May 1907 (No. 556^); north and south of Ichang, thickets, alt. 

 600-1300 m., April 1907 (No. 479 '') ; same locality, October 1907 (No. 

 415); Changlo Hsien, thickets, May 1907 (No. 556*^); without precise 

 locality, A. Henry (No. 5299). Eastern Szech'uan; without pre- 

 cise locality, A. Henry (No. 5875). Western Szech'uan:Tachien-lu, 

 alt. 2000-2600 m., October 1908 (No. 1293). 



This is one of the Chinese Pears formerly referred to P. sinensis Lindley (not 

 roiret j . It differs from that species for which 1 have proposed the name P. Lindleyi 

 Un / roc Amer. Acad. L. 230) chiefly on account of its brown fruit with deciduous 

 calyx and of its sharply and setosely serrate, not denticulate or dentate leaves. In 

 tne torm which I consider the type of P. serotina the leaves are generally oblong- 

 ovate, rounded at the base, and the bro^ fruit is subglobose and measures about 

 o cm. m diameter. 



Wilson's No. 2977, of which the fruit is not known, differs from the type in its 

 Dreader ovate or broadly ovate leaves with more appressed teeth and may repre- 

 sent a distinct variety or even another species. Henry's No. 5875 has the fruit 



?^Q -"^ a ^^^ ^^^^^^ **^ ^' ^^^^^^^^y var. Stapfiana Rehder. Henry's No. 

 G^yy 18 m flower only and agrees with this species in its glabrous styles; both of 

 -tlenry s specimens may be from cultivated plants. 



Pyrus serotina is common in Szech'uan and Hupeh and is cultivated in sev- 

 eral unproved forms as it is in Japan. The plant known in horticultural litera- 

 ture as /'smenszs belongs mostly to this species. Also P. sinensis Diels (in Bot. 



Janrb XXIX. 387) is probably referable to P. serotina, if it does not belong to 

 tne following species. 



A picture of this tree will be found under No. 0148 of the collection of Wilson's 

 pnotographs. 



Pyrus serrulata Rehder in Proc. Am. Acad. L. 234 (1915). 



Western Hupeh: Hsmg-shan Hsien, thickets, alt. 1300-1600 m., 

 May and December 1907 (No. 779, type); north and south of Ichang, 

 alt. 600-1300 m., October 1907 (No. 479). 



263 



