Genus Strelitzia in Family Strelitziaceae
In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.
Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.
Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).
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Genus Description
Suggest a correction!Strelitzia (family Strelitziaceae, order Zingiberales) comprises about six species of large, evergreen, sympodial herbs native to southern and southeastern Africa (POWO, 2024; WFO, 2024). The type species is Strelitzia reginae, and the genus is distributed from the Eastern Cape to KwaZulu-Natal and Eswatini, extending into coastal and riverine forests and open grasslands (Pooley, 1998). Strelitzia is deeply rooted in ornithology of the region, having supplied the inflorescence that led to the name “bird-of-paradise” for the family.
Vegetatively, Strelitzia forms unbranched aerial “stems” that are actually tightly overlapped leaf sheaths (pseudostems), reaching 1–10 m depending on species. Leaves are large, entire, oblong to lanceolate with a pronounced midrib and waxy cuticle. Inflorescences are typically terminal on the pseudostem, bearing boat-shaped spathes; within each spathe are several cyme-like units (paraclades), each producing a conspicuous zygomorphic flower (Dressler, 1997; Ronse De Craene & Bull-Hereñu, 2016). Perianth segments are showy and functionally differentiated: three erect white or purple outer tepals and three brightly colored inner tepals forming a nectary and a landing platform. Nectaries are septal and hypogynous; ovaries are tricarpellate and inferior, with axile placentation producing numerous seeds with orange arils (Ronse De Craene & Bull-Hereñu, 2016). Fruit is a leathery capsule that dehisces to release the arillate seeds.
Diversity centers in southeastern Africa, with each species occupying distinct microhabitats. Strelitzia nicolai (tree form) and Strelitzia alba (clumping form) occur in coastal and riverine forest understory; Strelitzia reginae and Strelitzia juncea inhabit open grasslands, rocky hillslopes, and fynbos margins; Strelitzia caudata occupies forest margins and dry bushveld (Pooley, 1998). Elevational ranges span near sea level to mid-elevations, typically
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Strelitzia alba (Skeels)
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Strelitzia caudata (R.A.Dyer)
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Strelitzia juncea (Andrews)
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Strelitzia nicolai (Regel & Körn.)
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Strelitzia reginae (Banks)
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