Phenology of Acacia koa on Mauna Loa, Hawaii

Ronald M. Lanner

Treesearch

Phenology of Acacia koa on Mauna Loa, Hawaii

Informally Refereed

Authors:

Ronald M. Lanner

Year:

1965

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note PSW-RN-089. Berkeley, CA: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture. 10 p

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Abstract

Flowering of koa was strongly seasonal on the Mauna Loa Strip. At 4,000 feet heavy flowering began in early December and lasted until early March. At 6,700 feet it extended from early March until mid-May. Heaviest flower losses occurred during anthesis, and were due to wind, rain, and possibly the dropping of unpollinated heads. Large insects were important as pollinators. Shoot growth was cyclic, being most rapid from April to August, and much slower from September to March, or April.

Citation

Lanner, Ronald M. 1965. Phenology of Acacia koa on Mauna Loa, Hawaii. Res. Note PSW-RN-089. Berkeley, CA: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture. 10 p.