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BOOJUM

Idria columnaris: age as determined by growth rate

Author: 
R.R. Humphrey and A.B. Humphrey
Article Date: 
1990
Article Abstract: 
A process for determining age of boojum trees from rate-of-growth measurements is described. "The age estimate...can be obtained by multiplying the inverse growth rate by the height of the plant." Tabular data
Language: 
English
Subject Headings: 

Ho, Ho, a boojum, definitely a boojum!

Author: 
R. Humphrey
Article Date: 
Autumn 1989
Article Abstract: 
The author, professor emeritus at the UofA, began his extensive research on the boojum only after his retirement in 1966. He recounts his fascinating experiences of the next five years as he studied the plants in Sonora. Numerous photographs of the Idria columnaris
Language: 
English
Subject Headings: