(181 ) 
Mertensia Alaskana Britton, sp. nov. 
Similiar to M. paniculata, 5 dm. high, or more. Stem 
and branches glabrous; pedicels 1-3 cm. long, very slender, 
appressed-pubescent with whitish hairs: leaves papillose- 
pubescent above, sparingly pubescent or glabrous beneath, 
the lower oblanceolate, 6-10 cm. long, acute, with margined 
petioles, the middle ones oblong-lanceolate, sessile, the upper 
lanceolate, acuminate: corolla 1.5 cm. long, the limb about the 
length of the tube: calyx 5-6 mm. long, cleft nearly to the 
base, the lobes lanceolate, acuminate, bristly-ciliate, other- 
wise glabrous or very nearly so; style not exserted. 
Fort Yukon, Alaska, Antoine Soule, 1865 (type); Daw- 
son (Williams), a white-flowered form; Mackenzie’s River, 
Onion, Kennicott and Hardisty, 1861-62. 
Family LasiaTAe. 
Dracocephalum parvifiorum Nutt. Dawson (Williams) ; 
Fort Selkirk (Tarleton). 
Family ScROPHULARIACEAE. 
Veronica alpina L. Summit of White Pass (Williams). 
Pentstemon cristatus Nutt. Five-finger Rapids (Wil- 
liams; Tarleton); Lake Lebarge (Tarleton). 
Euphrasia Americana Wetts. River bank above Fort 
Selkirk (Tarleton). 
Castilleja pallida (L..) Kunth. Above Dawson (Williams) ; 
above Fort Selkirk, near Indian River, and Five-finger Rap- 
ids (Tarleton). Mr. Tarleton’s specimens from above Fort 
Selkirk and Five-finger Rapids (nos. 80 and 8ob) differ from 
the others in being villous to the base and may represent 
another species. 
Pedicularis euphrasioides Stephan. Dawson and mouth 
of Bonanza (Williams); Five-finger Rapids (Tarleton). 
Pedicularis Sudetica Willd. Five-finger Rapids (Tarle- 
ton). 
Family OROBANCHACEAE. 
Thalesia fasciculata (Nutt.) Britton. Fort Selkirk (Tarle- 
ton). 
