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| Matucana | |
|---|---|
| Name | Matucana |
| Regnum | Plantae |
| Clade1 | Angiosperms |
| Clade2 | Eudicots |
| Order | Caryophyllales |
| Familia | Cactaceae |
| Tribus | Cereeae |
| Genus | Matucana |
| Authority | Friedrich Ritter |
Matucana is a genus of flowering plants in the family Cactaceae native to the central highlands of Peru, characterized by globose to short cylindrical stems and conspicuous tubular to funnelform flowers. The genus was described in the 20th century and has been treated in various systematic revisions alongside related genera such as Echinopsis, Notocactus, Parodia, Austrocactus and Echinocereus. Matucana species are of interest to specialists in botany, horticulture and conservation biology because of their restricted ranges, floral diversity, and roles in Andean ecosystems.
Plants in this genus typically form solitary or clumping bodies ranging from a few centimeters to over 30 centimeters in height, with ribs and tubercles bearing radial and central spines. Stems show variation similar to members of Trichocereus and Weberbauerocereus but can be distinguished by flower morphology resembling that of Haageocereus and Borzicactus. Flowers are usually diurnal, tubular to funnelform, brightly colored in red, orange, yellow or pink, and borne laterally or apically; they may echo traits seen in Aporocactus and Epiphyllum but are structurally distinct. Fruits are fleshy to dry, often dehiscent or indehiscent, and seeds are small, contrasting with genera like Gymnocalycium and Rebutia.
The generic circumscription has been debated among taxonomists following treatments by Curt Backeberg, Friedrich Ritter, Heimo Friedrich, and more recent authors publishing in journals such as Cactaceae Systematics and monographs referencing The International Plant Names Index and Plants of the World Online. Historically, species have been transferred between Matucana and genera including Schlumbergera, Lobivia, Echinopsis, Borzicactus, Browningia, Espostoa, and Soehrensia; molecular phylogenetic analyses using plastid DNA markers compared with work on ribosomal DNA and chloroplast sequences have clarified relationships with Harrisia-like clades. Recognized species include taxa described by authorities such as Donald Hunt, Werner Rauh, Rüdiger Puche, John Donald, and Curt Backeberg. Several infraspecific taxa, varieties, and synonyms are maintained in regional floras and checklists compiled by Peruvian National Herbarium, Kew Gardens, and the American Cactus and Succulent Society.
Matucana is endemic to the montane and intermontane valleys of central and northern Peru, occurring in departments associated with the Andes such as Lima Region, Junín Region, Huancavelica Region, and Pasco Region. Elevational ranges are generally between 800 and 3,200 meters, occupying xeric slopes, puna grasslands, rocky outcrops, and cloud-influenced ravines near localities documented by explorers like Theodor Kupper and collectors such as Edward Gilbert. Habitats are mosaic landscapes influenced by the El Niño–Southern Oscillation, Andean orogeny, and regional biogeographic barriers like the Amazon Basin and Pacific Ocean rainshadow. Microhabitats include crevices, alluvial terraces, and lithic soils comparable to those supporting Puya and Agave species.
Flowers are adapted to pollination by diurnal vertebrates and invertebrates; bright red and orange tubular blooms suggest ornithophily by hummingbirds such as species of Trochilidae including Heliodoxa and Coeligena, while yellow and pink forms attract insects like Megachilidae bees and nectar-feeding butterflies including Heliconius. Floral phenology aligns with seasonal precipitation and temperature regimes dictated by the Intertropical Convergence Zone, with fruiting timed for dispersal by frugivorous birds and small mammals such as species of Phyllotis. Ecological interactions include competition and facilitation with shrubs like Baccharis and Polylepis, and potential herbivory by insects recorded in inventories by researchers affiliated with Museo de Historia Natural de Lima and universities such as Universidad Nacional Mayor de San Marcos.
Matucana species are cultivated by collectors and botanical gardens including Royal Botanic Gardens, Kew, Jardín Botánico de Córdoba, Huntington Botanical Gardens, and private nurseries affiliated with the International Organization for Succulent Plant Research. Cultural requirements emphasize well-draining substrates similar to mixes used for Echinocereus and Ariocarpus: high light, low humidity, and cool dry winters to induce flowering. Propagation is by seed or vegetative offsets; seed-bearing techniques are described in publications by the Cactus and Succulent Society of America and practical manuals from Royal Horticultural Society. Uses are primarily ornamental; some local communities may use cacti for traditional practices documented in ethnobotanical surveys by institutions like Smithsonian Tropical Research Institute and Instituto Nacional de Cultura.
Many species have restricted ranges and face threats from habitat loss due to mining activities by companies regulated under Peruvian law, road construction in Andean corridors, grazing pressure, and illegal collection for the horticultural trade monitored by organizations such as CITES and IUCN. Conservation assessments have been performed by regional botanists collaborating with Conservation International, World Wildlife Fund, and national agencies resulting in listings ranging from Least Concern to Endangered in national red lists and proposals for inclusion in international assessments. Ex situ conservation efforts include seed banking at facilities like Millennium Seed Bank and living collections maintained by botanical gardens and specialist nurseries working with the Global Cactus Conservation Consortium.
Category:Cacti Category:Flora of Peru