Table 4."Phenological observations for hardwood trees and shrubs in Northern Idaho and west of the Continental Divide in Montana, 1928- 1937. 



Leaves 



Leaf Leaves Seed start Leaves Leaves 



buds full Flowers Flowers Fruits fall to color begin fallen 



Species burst grown start end ripe starts to wither to fall withered 



Acer glabrum 



Average date 



May 3 



June 6 



May 17 



May 29 



Aug. 6 



Sep. 9 



Aug. 28 



Sep. 15 



Oct. 12 



Earliest date 



Apr. 5 



May 8 



Apr. 26 



May 5 



July 10 



Sep. 9 



June 12 



Aug, 18 



Sep. 20 



Latest date 



May 20 



July 22 



June 4 



June 18 



Aug. 30 



Sep. 9 



Sep. 22 



Oct, 4 



Nov. 15 



Standard error 



3 



4 



3 



4 



8 







4 



3 



3 



Number of observations 



23 



23 



15 



14 



6 



1 



24 



22 



19 



AInus incana 





















Average date 



May 7 



June 8 



May 15 



May 30 



Aug. 24 



Sep. 10 



Sep. 5 



Sep. 20 



Oct. 14 



Earliest date 



Apr. 10 



May 1 



Mar. 20 



Apr. 15 



May 20 



May 25 



July 25 



Aug, 7 



Ssp. 5 



Latest date 



May 28 



July 28 



June 28 



July 10 



Oct. 20 



Dec. 16 



Oct. 15 



Oct. 21 



Nov. 1 



Standard error 



2 



3 



4 



3 



5 



16 



3 



3 



2 



Number of observations 



42 



44 



37 



37 



30 



10 



43 



43 



37 



Amelanchier alnifolia 





















Average date 



May 3 



June 1 



May 21 



June 5 



July 30 



Aug. 19 



Aug. 28 



Sep. 14 



Oct. 7 



Earliest date 



Apr. 5 



Apr. 25 



Apr. 18 



Apr. 24 



June 25 



July 10 



■ June 20 



July 15 



Sep. 2 



Latest date 



May 28 



July 15 



June 16 



July 1 



Sep. 10 



Sep. 30 



Oct, 2 



Nov. 1 1 



Nov. 1 1 



Standard error 



2 



3 



2 



2 



2 



6 



3 



3 



2 



Number of observations 



56 



58 



50 



54 



52 



19 



58 



55 



49 



Ceanothus velutinus 



1 



















Average date 



May 8 



June 7 



June 6 



July 12 



July 22 



Aug. 2 



Aug. 14 







Earliest date 



Apr. 15 



May 21 



May 18 



June 5 



June 21 



Aug. 1 



July 2 







Latest date 



June 6 



July 2 



June 20 



Aug. 18 



Aug. 5 



Aug. 5 



Sep. 26 







Standard error 



5 



4 



3 



9 



6 



1 



43 







Number of observations 



8 



11 



10 



9 



7 



3 



2 







Lonicera utahensis 





















Average date 



Apr. 29 



May 28 



May 11 



June 3 



July 3 



July 8 



Aug. 14 



Sep. 2 



Sep. 29 



Earliest date 



Apr. 1 



May 1 



Apr. 24 



May 5 



May 18 



June 12 



June 7 



July 2 



Aug. 2 



Latest date 



May 28 



June 23 



June 22 



July 20 



Aug. 20 



Aug. 11 



Sep. 21 



Oct. 9 



Oct. 27 



Standard error 



3 



3 



3 



4 



5 



7 



5 



5 



4 



Number of observations 



21 



22 



21 



23 



23 



9 



23 



24 



23 



Pachistima myrsinites 





















Average date 



May 3 



June 3 



May 15 



June 7 



July 16 



July 27 



Aug. 30 



Sep. 17 



Oct. 6 



Earliest date 



Apr. 12 



May 1 



Apr. 17 



Apr. 26 



May 5 



June 4 



June 7 



Sep. 1 



Sep. 15 



Latest date 



June 1 



July 2 



June 24 



July 26 



Sep. 1 



Sep. 1 5 



Oct. 16 



Oct. 6 



Oct. 21 



Standard error 



2 



3 



2 



3 



4 



1 1 



7 



3 



3 



Number of observations 



39 



41 



46 



44 



40 



13 



16 



14 



14 



Physocarpus malvaceus 





















Average date 



May 7 



May 21 



June 10 



July 4 



Aug. 18 





Aug. 24 



Sep. 26 



Oct. 18 



Earliest date 



Apr. 26 



May 7 



May 15 



June 1 6 



July 22 





Aug. 1 5 



Sep. 8 



Oct. 18 



Latest date 



May 20 



June 1 



July 5 



July 25 



Sep. 25 





Sep. 1 1 



Oct. 12 



Oct, 18 



Standard error 



4 



4 



8 



6 



12 





4 



10 







Number of observations 



5 



5 



6 



6 



5 





6 



3 



1 



Populus tremuloides 





















Average date 



May 9 



June 3 



May 30 



June 20 



July 9 



Aug. 6 



Sep. 10 



Sep. 25 



Oct. 15 



Earliest date 



Apr. 15 



May 10 



Apr. 1 



May 12 



June 25 



July 28 



July 28 



Aug. 18 



Sep. 18 



Latest date 



May 29 



July 13 



June 30 



July 12 



July 25 



Aug. 15 



Oct. 1 



Oct. 10 



Nov. 10 



Standard error 



2 



2 



6 



4 



3 



9 



3 



2 



2 



Number of observations 



34 



36 



15 



15 



12 



2 



35 



29 



27 



Populus trichocarpa 





















Average date 



Apr. 30 



May 30 



May 8 



June 3 



June 13 



June 26 



Sep. 14 



Sep. 25 



Oct. 14 



Earliest date 



Apr. 20 



May 1 



Apr. 6 



Apr. 20 



June 2 



June 19 



Aug. 8 



Sep. 4 



Oct. 1 



Latest date 



May 14 



July 13 



June 26 



July 19 



June 25 



July 2 



Sep, 30 



Oct. 3 



Oct. 31 



Standard error 



2 



5 



9 



13 



4 



6 



5 



3 



3 



Number of observations 



13 



13 



8 



7 



5 



2 



12 



10 



8 



Prunus virginiana 





















Average date 



Apr. 29 



May 17 



May 19 



June 11 



Aug. 14 



Sep. 19 



Sep. 15 



Sep. 28 



Oct. 14 



Earliest date 



Apr. 1 5 



Apr. 16 



Apr. 1 



May 15 



June 25 



Aug. 18 



Aug, 20 



Sep. 1 5 



Oct. 2 



Latest date 



May 8 



June 10 



June 16 



July 2 



Sep. 5 



Oct. 21 



Oct, 25 



Oct. 10 



Oct. 26 



Standard error 



2 



4 



4 



3 



5 



13 



5 



2 



2 



Number of observations 



14 



14 



15 



15 



14 



5 



15 



16 



14 



Table 4. con. 



12 



