204 



3- Primula angustifolia Torrey. Exceedingly abundant on 

 the higher slopes. Miss Deacon found a beautiful color-variety, 

 with the corolla a clearer pink (not at all magenta or bluish-pink) » 

 a tint best described as bright rose-pink, the eye pale orange. 

 The difference is doubtless due to greater acidity of the sap, 

 not to any difference in the pigment itself. There are various 

 intermediates, and very possibly the shade of color changes during 

 the life of the flower, so it hardly seems advisable to give a 

 varietal name. 



4. Primula parryi Gray. In the midst of a hailstorm, as we 

 hurried along, we were arrested by a truly magnificant sight, a 

 large clump of bright Primula flowers, entirely different from the 

 P. angustifolia growing all around. I thought I had a new 

 species of Primula, for although I had several times met with 

 P. parryi, it was always in the dense forests of the Hudsonian 

 Zone, by streams, and growing at least twice as tall. This plant, 

 with scapes about 80—90 mm. long; leaves about 80 mm. long^ 

 and 20-25 broad; calyx very dark red, densely glandular; corolla- 

 lobes 11-13 mm. long, very bright purplish pink; growing out in 

 the open far above timber line, looked very unlike true P. 

 parryi. Nevertheless, on actual comparison later with fresh 

 material of parryi, no doubt remained that we had found the 

 same species, a growth-form affected by the conditions of the 

 environment. For such a form a name is available, if required; 

 P. parryi f. mucronata (P. mucronata Greene, Pittonia, III, 251). 

 The apical mucro of the leaves is present in our plant, but there 

 are also remote marginal mucrones or denticles, not mentioned 

 by Greene. The outer leaves do not appear to be narrowed, 

 as they are said to be in the Nevada plant. The round-topped 

 flower clusters are characteristic. > Greene remarked that mu- 

 cronata grew "far above timber-line,: among rocks and near snow." 



5. Eritrichium argenteum Wight. Very abundant on the 

 higher slopies. Two forms were observed: 



(a) Typical. Flowers 6.5 mm. broad (Wight measured 4-6 mm. in dry specimens) 



very bright blue. 

 (&) Flowers 3.5-4 mm. broad, blue sometimes less bright. 



The first is the common form. 



