| | Family guide for fruits and seeds |
Common name: Duckeodendron Family.
Number of genera 1. Number of species 1 (Duckeodendron cestroides Kuhlm.).
Angiosperm. Magnoliopsida.
Disseminule an intact or entire fruit.
Fruits
Pistil(s) 1; 1-pistillate. Fruit pericarpium; simple; drupe; without persistent central column; not within accessory organ(s); 1-seeded; 1-seeded; from 5.1–10 cm long; 6 cm long; 2-carpellate (but only one carpel is fertile); with carpels united; with carpels remaining united at maturity; without sterile carpels; in transection terete; apex not beaked; indehiscent. Epicarp red; shiny; durable; glabrous (without hairs); without armature; without wing(s); without apical respiratory hole. Mesocarp present; fibrous; composed of 1 unified layer; without lactiform cavity system; and endocarp sharply differentiated. Endocarp present; not separating from exocarp; bony and fibrous (externally); not splitting into 1-seeded pyrenes; stone unilocular, or plurilocular; stone 1-loculate, or 2-loculate; without wing; without operculum; without secretory cavities; without mechanism for seedling escape; without grooves; without longitudinal ridges. Funiculus short; short without seed bearing hooks (retinacula); not persisting in fruit after seed shed.
Seeds
Aril absent. Seed U-shaped; not bowl shaped; not nutlike; without winglike beak; without caudate appendage(s); at maturity with food reserves; with endosperm; without canavanine. Sarcotesta absent. Testa present; without markedly different marginal tissue; without fleshy or leathery layer over hard layer; tight; 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; not becoming mucilaginous when wetted; surrounding embryo. Endosperm scant.
Embryo differentiated from food reserve; well developed; 1 per seed; partially filling testa (with food reserve); 0.9 times the length of food reserve; at one end of seed not extending into a depression or cup; axile and centric; linear; U-shaped; transverse to seed length; with cotyledons gradually connected to hypocotyl-radicle; without coleorhiza; without simmondsin; with cotyledons containing oils; without stomata; not green; with 2 or more cotyledons. Cotyledons 2; tiny; as wide as hypocotyl-radicle; 1 times wider than hypocotyl-radicle; not concealing hypocotyl-radicle; not foliaceous; flat; smooth; with apices entire; with margins separate; basally cordate; equal in size; not punctate dotted. Hypocotyl-radicle well developed; curved; not thickened.
Distribution
New World. South America (Brazil: Amazon basin).
Weed information
No USA noxious weeds.
Listed seeds
No ASOA or ISTA listed seeds.
Accepted genera
Duckeodendron Kuhlm.
References specific to this family
Cronquist page 891. Kuhlmann, J.G. 1934. Notas sôbre o gênera Duckeodendron. Arq. Inst. Biol. Veg. 1:35–37; Kuhlmann, J.G. 1947. Duckeodendraceae Kuhlmann (Nova família). Arq. Serv. Florest. 3:7–8.
General references
Cronquist, A. 1981. An integrated system of classification of flowering plants, 1,262 p. Columbia University Press, New York, 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
Acceptable fruit and seed illustrations. Cronquist has no illustration. Disseminule illustration(s): fruit, or seed, or embryo. Fruit illustration(s): Kuhlmann (1947). Seed illustration(s): Kuhlmann (1947). Embryo illustration(s): Kuhlmann (1947).
• Fruit. 1 of 2. Duckeodendron cestroides Kuhlmann: fruit. • Embryo. 2 of 2. Duckeodendron cestroides Kuhlmann: 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’.
