Indicator Plant: is a usually weedy plant that grows in some specific environment, allowing an assessment of soil and other conditions in a place by simple observation of vegetation.
Hawaiian Translation: Mea kanu kuhikuhi
An example of an indicator plant is the Royal Palm or Roystonea regia. Tthe coldest zone in which they normally succeed is Zone 10. This zone is typically 30 to 40 F (-1.1 to 4.4 C ).
Other indicator plants for zone 10 include:
Bougainvillea spectabilis (bougainvillea)
Cassia fistula (golden shower)
Corymbia citriodora (lemon-scented gum)
Ficus elastica (rubber plant)
Ensete ventricosum (Abyssinian-banana)
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