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Common name: Austrobaileya Family.
Number of genera 1. Number of species 1 (Austrobaileya scandens C.T.White).
Angiosperm. Magnoliopsida.
Disseminule an intact or entire fruit.
Fruits
Fruit pericarpium; multiple; baccetum; without persistent central column; more than 1 but less than 10-seeded; 4–6-seeded; 6–9-carpellate (4–14); with carpels united; with carpels separating at maturity; without sterile carpels; in transection terete; apex not beaked; wall leathery; indehiscent. Epicarp bright orange and yellow; durable; without armature; without wing(s); without apical respiratory hole. Mesocarp present, or absent; fleshy; composed of 1 unified layer; without lactiform cavity system. Endocarp absent. Funiculus short; short without seed bearing hooks (retinacula); not persisting in fruit after seed shed.
Seeds
Aril absent. Seed larger than minute; not bowl shaped; not nutlike; without winglike beak; without caudate appendage(s); at maturity with food reserves; with endosperm; without canavanine. Sarcotesta present; leathery. Testa present; with fleshy or leathery layer over hard layer; tight; shiny; surface unsmooth; surface with merged raised features; surface reticulate; without crease or line separating cotyledons from hypocotyl-radicle; without notch along margin where cotyledons from hypocotyl-radicle tip approach each other; without glands; without bristles; glabrous; without wings; without collar; without operculum; colored; monochrome; yellow (ish); not becoming mucilaginous when wetted; surrounding food reserve. Endosperm copious; ruminate; with starch; without fatty acid containing cyclopropene; without apical lobes; without chlorophyll; without isodiametric faceted surface; without odor.
Embryo differentiated from food reserve; well developed, or rudimentary; 1 per seed; partially filling testa (with food reserve); 0.1 times the length of food reserve; at one end of seed not extending into a depression or cup; axile and centric; foliate; straight; without coleorhiza; without simmondsin; without stomata; not green; with 2 or more cotyledons. Cotyledons 2; tiny; 0.4 times length of embryo; as wide as hypocotyl-radicle; smooth; equal in size; not punctate dotted. Hypocotyl-radicle moderately developed; straight; not thickened.
Distribution
Old World. Australia (northeastern).
Notes
Fruit ellipsoid-globose.
Weed information
No USA noxious weeds.
Listed seeds
No ASOA or ISTA listed seeds.
Accepted genera
Austrobaileya C. T. White
References specific to this family
Cronquist page 47.
General references
Cronquist, A. 1981. An integrated system of classification of flowering plants, 1,262 p. Columbia University Press, New York, Goldberg, A. 1986 (dicots) and 1989 (monocots). Classification, evolution, and phylogeny of the familes of Dicotyledons. Smithsonian Contr. Bot. 58 for dicots (314 pp.) and 71 for monocots (74 pp.). [Goldberg's illustrations are reproduced from older publications and these should be consulted], Gunn, C.R., J.H. Wiersema, C.A. Ritchie, and J.H. Kirkbride, Jr. 1992 and amendments. Families and genera of Spermatophytes recognized by the Agricultural Research Service. Techn. Bull. U.S.D.A. 1796:1–500, Spjut, R.W. 1994. A systematic treatment of fruit types. Mem. New York Bot. Gard. 70:1–182.
Illustrations
Color & B/W photo of F, 1 seed illustration. Cronquist has no illustration. Disseminule illustration(s): fruit, or seed, or embryo. Fruit illustration(s): Color photo. Seed illustration(s): Karen. Embryo illustration(s): Karen. Karen's plate number and taxon (taxa): 005: Austrobaileya scandens C.W. White (A-C).
• Seed. 1 of 2. Austrobaileya scandens C.T. White: seed. • Embryo. 2 of 2. Austrobaileya scandens C.T. White: embryo.
We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa. See also Guidelines for using data taken from Web publications.
Cite this publication as: ‘J.H. Kirkbride, Jr., C.R. Gunn, and M.J. Dallwitz. 2000 onwards. Family guide for fruits and seeds: descriptions, illustrations, identification, and information retrieval. Version: 12th April 2021. delta-intkey.com’.
