galapagos cactus tree

aloe america archipelago blue cactaceae cacti cactus charles conservation conserve darwin desert dry ecuador endemic environment environmental epiphytes equador equator extinct flower flowers foundation fruit galapagos glochids green growth herb herbal islands islas juice juicy leaf national nopales ocean opuntia ornamental pacific paddle park pear plant prickly red reserve safari sea slice south species spine spines succulent thorn tourism travel traveling treatment tree trip tropical tuna unesco voyage water wild wildlife world xerophytes zoo