ALCA BULLETIN BOARD Examples of commonly grown non cacti succulents in Arizona:
Is it a Cactus…?
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Medicinal Aloe (Aloe barbadensis) Century Plant (Agave americana) Agaves (Agave sp.) Red Yucca (Hesperaloe parviflora) Soap Tree Yucca (Yucca elata) Jade Plant (Crassula arborescens) Snake Plant (Sansevieria trifasciata) Flowering Kalanchoes (Kalanchoe blossfeldiana) Sedums (Sedum sp.) Hens and Chicks (Sempervivum sp.)
Succulents that are often thought to be cacti but are not:
…or is it not a cactus? Cacti and other suc• Candelilla (Euphorbia antisyphilitica) • Crown-of-Thorns (Euphorbia millii var. splendens) culents are gaining popularity both as landscape • Boojum Tree (Fouquieria columnaris) ornamentals and as potted plants. There is some • Ocotillo (Fouquieria splendens) confusion as to the difference between cacti and • Madagascar Ocotillo (Alluaudia procera) succulents. Cacti (singular cactus) is the commonly used name for a group of plants in the flowering plant family CACTACEAE. Why grow succulents? Succulents is a commonly used term for many plants across more than 60 • Most are easy to grow and are able to thrive with a minimum of plant families including CACTACEAE. Therefore, all cacti are succulents but care. • Most are attractive and may have a striking and unusual not all succulents are cacti. Succulent from the Latin, succulentus meaning appearance. sap, references the plant’s ability to retain moisture within the plant body and • Many come in a variety of colors. to thrive on limited moisture sources, such as mist and dew, which make them • Some have medicinal uses. equipped to survive in an ecosystem that contains scarce water resources. • Most require modest amounts of water and fertilizer. Because of the diversity of succulents across numerous plant families, suc• Most need lots of light but a few species will tolerate partial shade culents can be found in many different regions around the world. By contrast, or lower light conditions. most species of the CACTACEAE are native only to the New World which • Pests are a rare concern. refers to North, Central and South America. They range from the Arctic Circle to the mountains of Chile, but Mexico has the greatest number and Article provided by Cindy Odgers variety of species. The only cacti possibly native to the Old World are found in the genus Rhipsalis, found in East Africa, Madagascar, and Sri Lanka. Cacti can be distinguished from other succulents by the presence of areoles: small, cushion like structures with trichomes (hair-like) and in almost all species, spines (highly modified leaves) and on a few species, glochids (barbed bristles found on Chollas and Prickly pears – Ouch!). Areoles are modified stems from which flowers, more stems or leaves may grow. In most cacti species, leaves are absent, greatly reduced or highly modified. Stems instead of leaves are the primary sites for photosynthesis and water storage. These stems also establish the overall shape of the mature plant. The root systems are mainly thin, fibrous and shallow, spreading widely to absorb “Growing Forward” since 1982 superficial moisture. While cacti may grow in rainforests, mountains and deserts, they prefer well-draining, gritty or sandy soils. Non cacti succulents typically have leaves that may be swollen and “juicy” or thick and leathery looking. The leaves and stems may have spines or thorns (modified stems) or prickles (corky projections arising from dermal tissue). Leaves, stems or roots or a combination serve as water storage organs to insure survival under arid conditions. The mature structure of most non cacti succulents is determined by the shape and arrangement Now with nearly 150 acres of premier growing facilities we are of their leaves as opposed to their stems as is found with cacti. Non cacti providing the Valley with the widest selection of shrubs, trees, ornamentals, succulents do not have areoles. small and specimen size Agaves, Aloes, cacti and succulents.
ARIZONA WHOLESALE GROWERS
Examples of commonly grown cacti in Arizona: • • • • • • • • • • • •
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Saguaro (Carnegiea gigantea) Cholla (Cylindropuntia sp.) Barrel cacti (Echinocactus sp., Ferocactus sp.) Prickly pear (Opuntia sp.) Mexican Fence Post (Stenocereus marginatus) Arizona Queen of the Night (Peniocereus greggi) Pincushion Cactus (Mammillaria sp.) Bishop’s Cap (Astrophytum myriostigma) Cardon (Pachycerus pringlei) Creeping Devil cactus (Stenocereus eruca) Organ Pipe cactus (Stenocereus thurberi) Feather cactus (Mammillaria plumosa) THE ALCA INFLUENCE
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March/April 2022
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