384 WILSON EXPEDITION TO CHINA 



in the irregular ring of hairs at the mouth of the corolla formed by hairy disk-like 

 excrescences at the base of the filaments and in a hairy crescent-shaped crest 

 below the base of the lower hp, and in the rostrate nutlets. The drooping habit of 

 the long and slender spikes is also very pecuhar and, as far as I know, does not occur 

 in any other Elsholtzia. 



PLECTRANTHUS L'Herit. 



Plectranthus discolor Dunn in Not. Bot. Gard. Edinburgh, VIII. 155 

 (1913); VI. 140 (1915). 



Western Szech'uan: valley of Hsao-chin Ho, near Romi-chango, 

 alt. 2100-2700 m., June 1908 (No. 3529; shrub 1-1.3 m., flowers lav- 

 ender); Min River valley, alt. 1200-2700 m., August 1903 (Veitch 

 Exped. No. 4322; shrub 0.3-l.m., flowers blue); without precise 

 locality, alt. 1200 m., July 1903 (Veitch Exped. No. 4321; 0.6 m., 

 flowers blue). Kansu: without precise locality, W. Purdom (No. 

 804***, seeds only; plants growing in the Arnold Arboretum). 



Here may be added a note on another species not collected during the Arnold 

 Arboretum Expeditions. 



P. leucophyllus Dunn in Not. Bot. Gard. Edinburgh, VIII. 157 (1913); VI. 

 140 (1915). Western Szech'uan: Tung River valley, alt. 1200 m., July 1903 

 (Veitch Exped. No. 4319; shrub 1.3 m., flowers Hght purple). 



This species is closely related to the preceding species, but is easily distinguished 

 by its rugose leaves. 



