echinocereus sp. - green cactus with long spines in the botanical collection, odessa, ukraine

echinocereus cactus cactaceae caryophyllales succulent green spines thorns botanical collection garden desert arid xerophyte plant flora macro closeup natural nature botany horticulture biodiversity exotic vegetation greenhouse prickly dry droughttolerant ornamental photosynthesis desertplant taxonomy morphology succulentplant spiky cactuscollection flowering growth landscaping spiney ecosystem droughtresistant succulentcollection outdoorplant desertlife species