Table 1. - Phenological observations for conifers east of the Continental Divide in Montana and in Yellowstone National Park, 1928 - 1937. 



Winter Cones 





Bark 



Shoots 



Buds 



Pollen 



Pollen 



Shoots 



Bark 



buds 



full 



Cones 



Species 



slips 



start 



burst 



starts 



ends 



end 



sticks 



formed 



size 



open 



Abies lasiocarpa 























Average date 



May 22 



June 7 



June 14 



June 16 



July 4 



Aug. 4 



Aug. 30 



Aug. 7 



Aug. 29 



Aug. 30 



Earliest date 



Apr. 15 



Apr. 29 



May 25 



May 20 



June 1 



June 24 



Aug. 2 



June 16 



July 30 



July 31 



Latest date 



June 29 



July 21 



July 4 



July 10 



July 27 



Sep. 1 5 



Oct. 1 



Sep. 10 



Sep. 17 



Sep. 17 



Standard error 



5 



5 



3 



8 



9 



4 



5 



6 



7 



8 



Number of observations 



15 



21 



20 



7 



7 



19 



17 



18 



6 



5 



Juniperus^ 























Average date 



May 15 



June 7 



June 4 



July 3 



July 14 



July 30 



Aug. 27 



July 4 



Aug. 8 





Earliest date 



Apr. 25 



May 20 



May 20 



June 25 



July 10 



July 21 



Aug. 2 



June 20 



Aug. 1 





Latest date 



May 27 



June 22 



June 26 



July 14 



July 20 



Aug. 5 



Sep. 10 



Aug. 1 



Aug. 16 





Standard error 



5 



4 



3 



2 



2 



2 



4 



6 



4 





Number of observations 



9 



g 



10 



9 



7 



9 



8 



8 



4 





Pices engelmannii 























Average date 



May 11 



June 12 



June 16 



June 17 



July 3 



Aug. 4 



Aug. 29 



Aug. 3 



Aug. 17 



Aug. 30 



Earliest date 



Mar. 5 



Apr. 19 



May 21 



May 18 



May 30 



July 11 



July 28 



June 26 



July 19 



Aug. 18 



Latest date 



June 7 



July 21 



July 14 



July 3 



July 20 



Sep. 1 3 



Oct. 1 



Sep. 17 



Sep. 5 



Sep. 21 



Standard error 



4 



3 



2 



5 



5 



3 



3 



4 



4 



2 



Number of observations 



28 



38 



37 



14 



14 



34 



31 



32 



15 



14 



Pinus albicaulis 























Average date 



May 24 



June 17 



June 14 



July 21 



Aug. 5 



July 27 



Sep. 12 



Aug. 24 



Aug. 13 



Sep. 5 



Earliest date 



May 10 



June 1 



June 1 



July 21 



July 27 



July 14 



Aug. 30 



Aug. 14 



July 30 



Aug. 30 



Latest date 



June 7 



July 21 



June 28 



July 21 



Aug. 14 



Aug. 14 



Oct. 1 



Sep. 20 



Sep. 17 



Sep. 17 



Standard error 



14 



10 



5 







9 



9 



10 



9 



12 



6 



Number of observations 



2 



5 



6 



2 



2 



3 



3 



4 



4 



3 



Pinus contorta 























Average date 



May 6 



May 16 



May 30 



June 17 



July 3 



July 22 



Aug. 18 



Aug. 3 



Aug. 19 



Sep. 3 



Earliest date 



Mar. 18 



Mar. 18 



Mar. 18 



May 17 



June 1 



Apr. 6 



July 1 1 



June 6 



July 20 



July 18 



Latest date 



June 7 



July 21 



June 28 



July 14 



July 27 



Sep. 18 



Oct. 1 



Sep. 19 



Sep. 25 



Oct. 31 



Standard error 



2 



3 



2 



1 



1 



3 



3 



3 



2 



3 



Number of observations 



71 



82 



80 



74 



70 



75 



76 



69 



58 



55 



Pinus flexilis 























Average date 



May 14 



May 23 



May 27 



July 1 



July 12 



July 8 



Aug. 28 



July 3 



Aug. 16 



Aug. 27 



Earliest date 



Apr. 28 



Apr. 30 



Apr. 30 



June 20 



July 4 



June 22 



July 21 



June 1 1 



Aug. 15 



Aug. 23 



Latest date 



May 27 



June 6 



June 26 



July 14 



July 22 



Aug. 5 



Oct. 1 



Aug. 16 



Aug. 16 



Aug. 30 



Standard error 



4 



4 



3 



7 



5 



5 



8 



8 



1 



4 



Number of observations 



10 



11 



14 



3 



3 



10 



11 



10 



2 



2 



Pinus ponderosa 























Average date 



Apr. 28 



May 6 



May 24 



June 4 



June 17 



July 21 



Sep. 21 



Aug. 30 



Aug. 22 



Sep. 20 



Earliest date 



Mar. 22 



Apr. 3 



Apr. 7 



May 10 



May 25 



Apr. 18 



July 30 



June 30 



Aug. 1 



Sep. 10 



Latest date 



June 5 



June 20 



July 31 



June 23 



July 5 



Aug. 20 



Oct. 30 



Oct. 21 



Oct. 2 



Oct. 18 



Standard error 



5 



4 



5 



3 



3 



6 



6 



10 



6 



4 



Number of observations 



24 



24 



24 



21 



21 



22 



19 



17 



11 



9 



Pseudotsuga menziesii 























Average date 



May 3 



May 31 



June 5 



May 30 



June 13 



July 30 



Aug. 16 



Aug. 1 



Aug. 13 



Aug. 25 



Earliest date 



Mar. 3 



Apr. 25 



May 10 



Apr. 15 



May 2 



July 1 



July 6 



June 1 1 



July 1 1 



July 26 



Latest date 



May 31 



July 1 



June 22 



July 3 



July 25 



Sep. 21 



Oct. 1 



Sep. 15 



Sep. 15 



Oct, 14 



Standard error 



3 



3 



2 



4 



4 



3 



3 



3 



3 



4 



Number of observations 



49 



55 



57 



40 



39 



52 



51 



48 



41 



40 



'This juniper vuas not identified at that time, but it was most likely Juniperus communis. 



8 



