Fruit and foliage of the Guava (Psidium guajava), Lower Nahiku Road, east Maui. An invasive species in Hawaii; forma dense weedy thickets in disturbed areas from sea level to about 4,000 feet.
Fruit and foliage of the Guava (Psidium guajava), Lower Nahiku Road, east Maui. An invasive species in Hawaii; forma dense weedy thickets in disturbed areas from sea level to about 4,000 feet.
Fruit and foliage of the Guava (Psidium guajava), Lower Nahiku Road, east Maui. An invasive species in Hawaii; forma dense weedy thickets in disturbed areas from sea level to about 4,000 feet.
Fruit and foliage of the Guava (Psidium guajava), Lower Nahiku Road, east Maui. An invasive species in Hawaii; forma dense weedy thickets in disturbed areas from sea level to about 4,000 feet.
Fruit and foliage of the Strawberry Guava (Psidium cattleianum), Wailua Falls, east Kaua'i. A fruit tree that is considered to be one of the worst invasive weed species in the Hawaiian Islands. Typically forms extremely dense stands of trees that are completely impenetrable. In addition, it is strongly allopathic, exuding toxic chemicals that inhibit the growth of understory plants. Its tasty fruit is eaten by feral pigs who then spread the seeds in their feces.
Common Guava (Psidium guajava) fruit and leaves. Hana Maui Botanical Garden, east Maui.
Common Guava (Psidium guajava) blossom, fruit, and leaves. Hana Maui Botanical Garden, east Maui. Widely cultivated in tropical and subtropical regions around the world, guava fruits can range in size from as small as an apricot to as large as a grapefruit. Various cultivars have white, pink, or red flesh, and a few also feature red (instead of green) skin.
Maturing fruit weighs heavy on the limbs of a Guava tree (Psidium guajava). Upcountry, just outside Lana'i City, island of Lana'i.
A solitary white blossom graces the large handsome leaves of the Guava (Psidium guajava). Upcountry, just outside of Lana'i City, island of Lana'i. 

Guava is a pestiferous tree-like shrub that was introduced to the islands in 1791. It is easily spread by horses, cattle, feral pigs, and birds. It grows quickly, crowding out other plants, especially native species. In its favor is its wonderfully tasty and nutrient-rich egg-sized yellow fruit.
Fruit and foliage of the Guava (Psidium guajava), Lower Nahiku Road, east Maui. An invasive species in Hawaii; forma dense weedy thickets in disturbed areas from sea level to about 4,000 feet.
Fruit and foliage of the Guava (Psidium guajava), Lower Nahiku Road, east Maui. An invasive species in Hawaii; forma dense weedy thickets in disturbed areas from sea level to about 4,000 feet.
Fruit and foliage of the Guava (Psidium guajava), Lower Nahiku Road, east Maui. An invasive species in Hawaii; forma dense weedy thickets in disturbed areas from sea level to about 4,000 feet.
See photo in original gallery.