344 WILSON EXPEDITION TO CHINA 



Rosa sericea Hemslej' in Jour. Linn. Soc. XXIII. 254 (non Lindley) (1887), 

 quoad specimen Andersonii. 



Yunnan : " CoUines arides autour de Tong-chouan," alt. 2600 m., April 1911, 

 E. E. Maire (type). 



This is probably nothing more than a very hairy and small leaved variety of 

 Rosa omeiensis Rolfe, but in the absence of fruiting specimens and first-hand 

 knowledge we hesitate to reduce it to varietal rank. The specimens collected in 

 Manipur by Watt and referred to in the Gard. Chron. ser. 3, XXXVIII. 261 (1905) 

 and in the Bot. Mag. CXXXIV. sub. t. 8218 (1908) in all probability belong here. 

 In the Gray Herbarium are two specimens from the Herb. Griffith (Nos. 2138, 

 2139) collected on the eastern Himalaya which apparently belong here also. 

 It is unfortunate that none of the specimens are in fruit. 



Subfam. PRUNOIDEAE. 



Determined by Alfred Rehder. 



The genera Maddenia and Prunus having been dealt with by E. Koehne on pp. 

 56-75 and 196-282 of volume I., it remains only to add here three Chinese genera 

 not collected during the Arnold Arboretum Expeditions. 



PYGEUM Gartn. 



Pygeum Henryi Dunn in Jour. Linn. Soc. XXXV. 493 (1903). — Koehne in Bot. 

 Jahrb. LI. 185 (1913). 



Yunnan: Szemao, alt. 1300-1500 m., A. Henry (Nos. 12313, 12313% 12313'', 



12708). 



Pygeum latifolium Miquel is recorded by Hemsley (in Jour. Linn. Soc. XXIII. 

 223) from Hongkong and by Leveille {Fl. Kouy-Tcheou, 352) from Kwei-chou, but 

 Koehne in his synopsis of the genus (Bot. Jahrb. LI. 195) cites only Javanese speci- 

 mens under P. latifolium and enumerates P. Henryi as the only Chinese species. 



DICHOTOMANTHES Kurz. 



Dichotomanthes tristaniaecarpa Kurz in Jour. Bot. XI. 195, t. 133, fig. 2 

 (1873). — Hemsley in Jour. Linn. Soc. XXIII. 307 (1887); in Hooker's Icon. 

 XXVII. t. 2653 (1900). 



Yunnan: Mengtsze, alt. 1500-1700 m., A. Henry (Nos. 9367% 10255, 10255»). 



Dichotomanthes tristaniaecarpa, var. glabrata Rehder, n. var. 



A typo recedit foliis initio subtus floccoso-tomentosis mox glabrescentibus, ma- 

 turitate costa media excepta glabris interdum basi rotundatis apice obtusiuscuUs 

 mucronulatis. 



Yunnan: Szemao, alt. 130O-1500 m., A. Henry (Nos. 11959", type, tree 7 m. 

 tall, fruit red; 11959, shrub 1 m. tall, white flowers). 



Except in the glabrescent leaves and a slight difference in their shape this variety 

 agrees in all its other characters with the type. 



PRINSEPIA Royle. 

 Sect. 1. EUPRINSEPIA Rehder, n. sect. 



Prinsepia Royle, HI. 206, t. 38, f. 1 (1839). 

 Flores racemosi; stamina numerosa, pluriserialia. Frutex ramis viridibus spinis 

 validis saepe foUosis munitis. 



