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 trichophylla Royle, IU. 260, t. 63, fig. 3 (1839). — De Candolle, Prodr. 
VII. 592 (1839). — Clarke in Hooker f., Fl. Brit. Ind. III. 457 (1882). — Dunn in 
Jour. Linn. Soc. XXXIX. 451 (1911). 
Western Szech'uan: without precise locality, 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 (l. 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 WNiedenz.! 
Arctous alpinus Niedenzu in Bot. Jahrb. XI. 180 (1889).— Schneider, 
Ill. Handb. Laubholzk. II. 545, fig. 356 l-r (1911). 
Arbutus alpina Linnaeus, Sp. Pl. 395 (1753). — Sowerby, Eng. Bot. XXIX. t. 
2030 (1809). 
Mairania alpina Desvaux in Jour. de Bot. I. 37 (1813). — Britton & Brown, 
Ill. 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. j 
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 cireumpolar plant in western China is very Inte 
The same variety with red fruit occurs in north-western North Amer! 
(Alberta: Sulphur Mts. near Banff, August 8, 1904, and Lake Louise near Lagg®™ 
August 12, 1904, Alfred Rehder). lowing 
It seems to be the common form of western North America, as the fol 
references kindly furnished us by Professor M. L. Fernald tend to show: Ri aó 
son, Arct. Searching Exped. 533 (1851): “ Arctostaphylos alpina . . . There 
1 Britton & Brown, Ill. Fl. II. 572 (1897) take up Mairania Necker, Elem. Bee 
I. 219 (1790) as the oldest generic name of this genus. Mairania, however, we 
be referred as a synonym to Arctostaphylos Adanson (1763) ; its type speci 
Arctostaphylos uva-ursi (Linnaeus) Sprengel, as Necker’s quotation “ . Ber p m 
Linn. Uva ursi Tournef." clearly shows, and also his description of the 
* drupa . . . loeulis singulis nucleum foventibus.” 
