556 WILSON EXPEDITION TO CHINA 



The elliptic leaves cuneate at the base readily distinguishes this variety from 

 the type. 



Here may be added the following rare species which was not collected during the 

 Arboretum Expedition. 



Gaultheria trichophyUa Royle, III. 260, t. 63, fig. 3 (1839). — De CandoUe, Prodr. 

 VII. 592 (1839). — Clarke m Hooker f., Fl. Brit. Ind. III. 457 (1882). — Dunn in 

 Jour. Linn. Soc. XXXIX. 451 (1911). 



Western Szech'uan : without precise locahty, alt. 4600 m., July 1904 (Veitch 

 Exped. No. 3915; flowers white, fruit blue); vicinity of Tachien-lu, A. E. Pratt 

 (No. 833). 



A very rare plant occurring in the forests west of Tachien-lu. Clarke (1. c.) 

 says the pedicels are densely clothed with ovate bracts but in Royle's figure, as 

 in the specimens before us, the pedicels are naked except for two bracteoles imme- 

 diately below the calyx. The fruits and leaves are slightly larger than they are 

 described by Clarke and each anther-cell has two straight, recurved awns, not one 

 as figured for the Indian form. 



ARCTOUS Niedenz.i 



Arctous alpinus Niedenzu in Bot. Jahrb. XI. 180 (1889). — Schneider, 

 III Handb. Lauhholzk. II. 545, fig. 356 l-r (1911). 



Arbutus alpina Linnaeus, Sp. PI. 395 (1753). — Sowerby, Eng. Bot. XXIX. t. 



2030 (1809). 

 Mairania alpina Desvaux in Jour, de Bot. I. 37 (1813). — Britton & Brown, 



III. Fl. II. 573, fig. 2777 (1897). 

 Arctostaphylos alpina Sprengel, Syst. II. 287 (1825). — Hallier, Fl. Deutsch. 



XX. 112, t. 2041 (1885). 



Arctous alpinus, var. ruber Rehder & Wilson, n. var. 



A typo recedit fructu rubro. 



Western Szech'uan: north-east of Sungpan, by the side of 

 stream rich in calcareous deposits, near Temple of Wang-lung-shih, 

 alt. 3300 m., August 22, 1910 (No. 4025; shrub 10-15 cm. tall, fruit 

 globose, scarlet). 



The discovery of this circumpolar plant in western China is very interesting. 



The same variety with red fruit occurs in north-western North America 

 (Alberta : Sulphur Mts. near Banff, August 8, 1904, and Lake Louise near Laggan, 

 August 12, 1904, Alfred Rehder). 



It seems to be the common form of western North America, as the following 

 references kindly furnished us by Professor M. L. Femald tend to show: Richard- 

 son, Arct. Searching Exped. 533 (1851) : " Arctostaphylos alpina . . . There are 



» Britton & Brown, III. Fl. II. 572 (1897) take up Mairania Necker, Elem. Bot. 

 I. 219 (1790) as the oldest generic name of this genus. Mairania, however, must 

 be referred as a synonym to Arctostaphylos Adanson (1763); its type species is 

 Arctostaphylos uva-ursi (Linnaeus) Sprengel, as Necker's quotation "Quaed. Arbut. 

 Linn. Uva ursi Tournef." clearly shows, and also his description of the fruit as 

 " drupa . . . loculis singuhs nucleum foventibus." 



