Answer: First off, I apologize for the delay in answering your question. Unfortunately, I am not familiar with a Hawaiian white pine. There is a long needled pine-looking tree called Casuarina that grows in the tropics, however it would not be hardy where you live. Some needled evergreens such as spruce (Picea) and Juniper tend to be prickly, however pines (Pinus) as a group are less so. Mugo pine (Pinus mugo) would stay relatively low and dense, perhaps this would suit your needs. Another possibility would be yew, these shrubs we typically see used as foundation plants actually grow rather large when left unsheared and also stay dense. Your local county extension and/or professional nursery staff might be able to make some suggestions based on a more detailed knowledge of the location where you would like to plant your evergreens. Good luck with your search!
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