150 BOTANICAL GAZETTE [FEBRUARY 
TABLE III 
Manners paper Bue ts 
Sa RO re 6000 August 9 
Salix nivalis ; 7500 July 1 
Salix herbac Baa eras 8200 July 23 
Phyllodoce empetriformis er a ee Ic eon 7200 July 12 
Kalmia glauca Bye See ys gos 5000 August 25 
Phyllodoce glanduliflora Rosana ee eae 7500 July 18 
Arctostaphylos Uva-ursi. 5000 July 
edum groenlandicum 5000 July 
ododendron albiflorum 7500 July 27 
Menziesia glabell : (000 July 3 
Va WO a ae 6500 June 26. 
Aretostaphylos:alpina...... 2... | Dowland August 4 
AICINSIRDRVIOS RIDINA 2 a, ge, 6700 June 25 
(peniooe Mrertenaane Ss 4000 August 
Oils and fats only 
bi WERNER ree See ap 6400 July 17 
i i Res 26 
Gaultheria ovatifolia Lowland August 15 
Arctuous rocarpa : ‘ 5000 ugust 15 
mpetrum nigru ge eg esa Creat 5100 August 15 
Summary 
1. All the species examined showed a high starch content dur- 
ing the summer, which disappeared during October. 
2. All the trees and shrubs of this district which were exam- 
ined contained oils and fats as food reserve during winter with the 
exception of Lonicera glaucescens and Crataegus sp. The presence 
of sugar was demonstrated in many of the species. Quantitative 
determinations in a few places gave a total sugar content of o. 5-2 
per cent. 
3. Deciduous leaves, at the time of leaf fall, were devoid of 
starch, but contained oils and fats. 
4. Most of the species of alpine Salicaceae and Ericaceae 
examined showed the presence of both starch and oil during the 
vegetative season. Gaultheria ovatifolia, a lowland species, showed 
only oil. Hence the ability to form starch does not seem to be 
associated with climatic conditions, resulting from high altitudes. 
UNIVERSITY OF ALBERTA 
EpMONTON, CANADA 
