Broad-leaf white mahogany

Eucalyptus umbra

Broad-leaf white mahogany (Clemson, p.78) is the poorer cousin of the white mahogany (E. acmenioides) which is utilised by beekeepers in the NSW North Coast forests. Clemson, in his book, does not highly recommend it for beekeeping but I have observed it producing useful yields of pollen and nectar, usually around late October, November.

A one-sample test indicated a crude protein level of 18% with a reasonably balanced amino acid ratio, iso-leucine being only slightly below the desired level. (Table 31)

Broad-leaf white mahogany, using this test as a guide, would not be suitable as a source of pollen to collect and feed back at a later date.

Table 31: Broad-leaf white mahogany E. umbra

Amino acid
Minimum % of Amino-Acid from De Groot (1953)
Mallanganee November 1990
Threonine 3.0 3.5 
Valine 4.0 4.8 
Methionine 1.5 1.9 
Leucine 4.5 6.3 
Iso-leucine 4.0 3.8*
Phenylalanine 2.5 3.7 
Lysine 3.0 6.0 
Histidine 1.5 2.1 
Arginine 3.0 6.1 
Tryptophan 1.0 2.7 
Crude protein - 18.3%

* Low level of this amino-acid


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