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Cactus flowers usually have many stamens, but only a single style, which may branch at the end into more than one stigma. The stamens usually arise from all over the inner surface of the upper part of the floral tube, although in some cacti, the stamens are produced in one or more distinct "series" in more specific areas of the inside of the ...
The plants that bear such flowers can be tall, columnar, and sometimes extremely large and tree-like, but more frequently are thin-stemmed climbers. While some night-blooming cereus are grown indoors in homes or greenhouses in colder climates, most plants are too large or ungainly for this treatment and are only found outdoors in tropical areas.
Flowers grow 8.6–12.4 cm (3.4–4.9 in) long, and are open for less than 24 hours. Since they form only at the top of the plant and the tips of branches, saguaros growing numerous branches is reproductively advantageous. Flowers open sequentially, with plants averaging four flowers open per day over a bloom period lasting a month. [7]
The flowers are large, funnelform, 9–30 cm (3 + 1 ⁄ 2 – 11 + 3 ⁄ 4 in) long, usually white, sometimes pink, purple, rarely cream, yellow, greenish, and open at night. The fruits are globose to ovoid to oblong, 3–13 cm ( 1 + 1 ⁄ 4 –5 in) long, fleshy, naked, usually red but sometimes yellow, pulp white, pink or red.
The barrel cactus can live to be over 100 years old. Barrel cactus buds typically start to bloom in April with a bright yellow or orange flower. Pink and red varieties also exist but occur less frequently. The flowers only appear on the very top of the plant. As the flowers begin to wilt in early May, they may change color.
Epiphyllum oxypetalum, the Dutchman's pipe cactus, [3] princess of the night or queen of the night, [4] is a species of cactus with a native range from Mexico to Nicaragua. [5] It blooms nocturnally, and its flowers wilt before dawn.
The plants of the cactus family are particularly well known for their dense covering of spines. Some cacti have also glochids (or glochidia , singular glochidium) – a particular kind of spine of different origin, which are smaller and deciduous with numerous retrose barbs along its length (as found in areoles of Opuntia ).
Opuntia, commonly called the prickly pear cactus, is a genus of flowering plants in the cactus family Cactaceae, many known for their flavorful fruit and showy flowers. [1] Cacti are well-adapted to aridity; however, they are still vulnerable to alterations in precipitation and temperature driven by climate change. [ 2 ]