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Annonaceae
Annonaceae image
Arizona State University Herbarium
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Robert Kral in Flora of North America (vol. 3)
Trees, shrubs, rarely woody vines, deciduous or evergreen, with aromatic bark, leaves, and flowers. Pith septate to diaphragmed. Leaves alternate, simple, without stipules, petiolate. Leaf blade pinnately veined, unlobed, margins entire. Inflorescences axillary to leaf scars on old wood or to leaves on new shoots, solitary flowers or few-flowered fascicles, pedunculate; bracts or bracteoles present or absent. Flowers bisexual, rarely unisexual; receptacle becoming enlarged, elevated or flat; perianth hypogynous, segments valvate or imbricate; sepals persistent, (2-)3(-4), distinct or basally connate; petals either 6 in 2 unequal whorls of 3 with petals of outer whorl larger, petals of inner whorl fleshier than the outer, often with corrugate nectary zone, or petals 6-12(-15), nearly equal or unequal, veins impressed on inner face; stamens 10-20 or very numerous, hypogynous, spirally arranged, forming ball or flat-topped mass; filament short, stout; anther linear to oblong-linear, extrorse, longitudinally dehiscent; connective apically elongate, connivent; pistils 1-many, superior, 1-carpellate, 1-locular, distinct or connate to various degrees with at least stigmas distinct; placentation marginal, placenta 1; ovules 1-many per pistil; style short, thick; stigma terminal. Fruits berries, distinct, 1-8(-12) per flower, or coalescent, forming syncarps, 1 per flower. Seeds 1-many per pistil, arillate; endosperm ruminate, oily. The family has particular importance in the tropics because of the edible syncarps of some species of Annona ; in the eastern United States the fruit of Asimina triloba (pawpaw) was once much gathered and appreciated. Programs in breeding from selected stock of Asimina have been undertaken (G. A. Zimmerman 1941). Currently, the Pawpaw Foundation is intensively researching means to develop commercially marketable fruits. Recent studies of the chemical properties of Asimina reveal its pesticidal possibilities, and its potential as an anticancer agent (E. M. Norman, pers. comm.) The warm-climate genera Cananga , Rollinia , and Artabotrys have been used as ornamentals.

Annona cherimola
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Annona glabra
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Annona montana
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Annona mucosa
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Annona muricata
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Annona reticulata
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Annona squamosa
Image of Annona squamosa
Artabotrys hexapetalus
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Asimina angustifolia
Image of Asimina angustifolia
Asimina incana
Image of Asimina incana
Asimina longifolia
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Asimina nashii
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Asimina obovata
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Asimina parviflora
Image of Asimina parviflora
Asimina pulchella
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Asimina pygmea
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Asimina reticulata
Image of Asimina reticulata
Asimina speciosa
Image of Asimina speciosa
Asimina tetramera
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Asimina triloba
Image of Asimina triloba
Aspalthium bituminosum
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Cananga odorata
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Deeringothamnus rugelii
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Guatteria blainii
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Guatteria caribaea
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Oxandra lanceolata
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Oxandra laurifolia
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Polyalthia suberosa
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NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.