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Not evaluated (IUCN 3.1)
Psidium cattleianum, named in honour of notable English horticulturist William Cattley, commonly known as Cattley guava or Peruvian guava, is a small tree (2–6 m tall), bearing small red or yellow fruit, which are somewhat sour but edible raw or made into jam. The red-fruited variety, PSIDIUM LITTORALE Var. Longipes, is known as strawberry guava; the yellow-fruited variety, PSIDIUM LITTORALE Var. Littorale (Lucidum) is variously known as lemon guava, "yellow-fruited cherry guava", and in Hawaii as waiawī and is usually larger.
Native to Brazil where it is known as araçá (ara-SAH) and adjacent tropical South America, it is closely related to common guava (P. guajava), and like that species is a widespread, highly invasive species in tropical areas, especially Hawaiʻi. It tends to form dense, monotypic stands which prevent regrowth of native species, and is very difficult to eradicate; it also provides refuge for fruit flies which cause extensive agricultural damage. As an invasive species, it is sometimes erroneously called Chinese guava.
Strawberry guava is sporadically naturalised in coastal areas of Queensland and northern New South Wales. It is also naturalised on Lord Howe Island, Norfolk Island and Christmas Island (Navie 2004; Queensland Herbarium 2008). The yellow variety bears even more heavily than the red and generally has larger fruit. ( http://www.environment.gov.au/cgi-bin/biodiversity/invasive/weeds/weeddetails.pl?taxon_id=5397 )
The whole fruit can be eaten as both the thin skin and juicy interior are soft and tasty. Strawberry guavas taste like a passionfruit mixed with strawberry; the yellow variety lacks the astringency of the red.  The skin tastes a bit like rose petals, but is often removed for a sweeter flavour. The seeds are small and white in colour and can be roasted as a substitute for coffee. Its leaves may be brewed for tea.
- USDA-ARS. "GRIN Taxonomy for Plants". Retrieved 9 June 2011.
- Missouri Botanical Gardens. "Tropicos.org". Retrieved 9 June 2011.
- US Forest Service, Institute of Pacific Islands Forestry. "Biological Control of Strawberry Guava in Hawaii". Retrieved 29 June 2012.
The Complete Book of Fruit Growing in Australia, Louis Glowinski, ISBN 0 85091 870 7
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- Photo of ripening lemon guavas. Retrieved 2007-NOV-25.
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