Common name. Golden pennants. Family Haloragaceae.
Habit and leaf form. Erect herbs; often deciduous. Perennial. Stem growth not conspicuously sympodial (monopodial). Mesophytic. Leaves alternate; spiral; sessile; non-sheathing; simple; epulvinate. Leaf blades entire; ovate, or obovate, or linear; one-veined, or pinnately veined. Leaves without stipules. Stem anatomy. Secondary thickening absent, or developing from a conventional cambial ring.
Reproductive type, pollination. Fertile flowers hermaphrodite. Unisexual flowers absent. Plants hermaphrodite. Anemophilous.
Inflorescence and flower features. Flowers solitary, or aggregated in ‘inflorescences’; in cymes. The terminal inflorescence unit cymose. Inflorescences terminal; terminal cymes of compound dichasia; pseudanthial, or not pseudanthial. Flowers pedicellate (pedicels filamentous); bracteate; bracteolate; minute to small; regular; (2–)4 merous; cyclic; tetracyclic, or pentacyclic. Free hypanthium absent. Perianth with distinct calyx and corolla; 4, or 8; 2 -whorled; isomerous; free. Calyx present; 2, or 4; 1 -whorled; polysepalous; valvate; exceeded by the corolla; regular; persistent. Sepals triangular (deltoid). Corolla present; 2, or 4; 1 -whorled; polypetalous; regular; cream, or yellow. Petals hooded, or not hooded; navicular, or not navicular. Androecial members definite in number. Androecium 4, or 8. Androecial members free of the perianth; all equal; free of one another; 1 -whorled, or 2 -whorled. Androecium exclusively of fertile stamens. Stamens 4, or 8; all more or less similar in shape; isomerous with the perianth, or diplostemonous; alternisepalous and oppositisepalous; filantherous (with rather large anthers). Anthers basifixed; non-versatile; dehiscing via longitudinal slits; latrorse; four locular; tetrasporangiate; appendaged, or unappendaged; usually apiculate. Gynoecium (2–)3–4 carpelled. The pistil 1 celled. Gynoecium syncarpous; synovarious; inferior. Ovary unilocular; pseudo- 1 locular. Epigynous disk absent. Gynoecium stylate. Styles 2, or 4; free; apical. Stigmas capitate. Ovules in the single cavity 4; pendulous; anatropous.
Fruit and seed features. Fruit non-fleshy; indehiscent; a nut; 1 locular; 1 seeded. Seeds more or less copiously endospermic. Endosperm oily. Cotyledons 2. Embryo straight.
Special features. Inflorescence determinate.
Etymology. From the Greek for "gluey" and "nut".
Wheeler, Judy; Marchant, Neville; Lewington, Margaret; Graham, Lorraine (2002). Flora of the south west, Bunbury, Augusta, Denmark. Volume 2, dicotyledons. Australian Biological Resources Study. Canberra.
Australia. Bureau of Flora and Fauna (1990). Flora of Australia. Volume 18, Podostemaceae to Combretaceae. Australian Govt. Pub. Service. Canberra.
Marchant, N. G.; Wheeler, J. R.; Rye, B. L.; Bennett, E. M.; Lander, N. S.; Macfarlane, T. D.; Western Australian Herbarium (1987). Flora of the Perth region. Part one. Western Australian Herbarium. Perth.
Blackall, William E.; Grieve, Brian J. (1980). How to know Western Australian wildflowers : a key to the flora of the extratropical regions of Western Australia. Part IIIA. University of W.A. Press. Perth.
Orchard, A. E. (1975). Taxonomic revisions in the family Haloragaceae. 1, the genera Haloragis, Haloragodendron, Glischrocaryon, Meziella and Gonocarpus. Auckland Institute & Museum. Auckland, N.Z.
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