Dampiera R.Br.
Prodr.Fl.Nov.Holland. 587 (1810)

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Name Status: Current

Photo of Dampiera R.Br.

 

Scientific Description
J. Gathe and Leslie Watson, Friday 3 October 2008

Common name. Dampieras. Family Goodeniaceae.

Habit and leaf form. Shrubs (subshrub), or herbs. ‘Normal’ plants, or switch-plants; often with the principal photosynthesizing function transferred to stems. Leaves well developed, or much reduced, or absent. Perennial. Leaves cauline. Stem internodes solid. Mesophytic, or xerophytic. Leaves alternate; spiral; petiolate to sessile; non-sheathing; simple; epulvinate. Leaf blades entire; flat, or solid; sometimes terete, or semi-terete; linear, or ovate, or oblong, or trullate; pinnately veined. Leaves without stipules. Leaf blade margins entire (or sinuate), or dentate (obtusely). Leaves without a persistent basal meristem. Leaf anatomy. Hairs present, or absent; complex hairs present, or absent. Complex hairs sometimes stellate (or dendritic or centrifixed, cottony or woolly). Extra-floral nectaries absent (ass.). Stem anatomy. Secondary thickening absent, or developing from a conventional cambial ring.

Reproductive type, pollination. Fertile flowers hermaphrodite. Unisexual flowers absent. Plants hermaphrodite. Entomophilous. Pollination mechanism conspicuously specialized (involving a stylar modification for pollen presentation).

Inflorescence and flower features. Flowers solitary, or aggregated in ‘inflorescences’; terminal, or axillary; in racemes, or in spikes (or spike-like), or in heads, or in umbels, or in panicles (irregular cymo-panicles), or in cymes (in a thyrse). The terminal inflorescence unit cymose, or racemose. Inflorescences scapiflorous, or not scapiflorous; terminal, or axillary; with involucral bracts, or without involucral bracts; pseudanthial, or not pseudanthial. Flowers pedicellate, or subsessile; bracteate (opposite); bracteolate (sometimes), or ebracteolate; small to medium-sized; very irregular. The floral asymmetry involving the perianth and involving the androecium. Flowers 5 merous; cyclic; tetracyclic. Free hypanthium absent. Perianth with distinct calyx and corolla; (8–)10; 2 -whorled; isomerous, or anisomerous. Calyx present; 5 (or obsolete); 1 -whorled; polysepalous, or gamosepalous; blunt-lobed (ass.); tubular. Corolla present; 5; 1 -whorled; appendiculate (the upper lobes auriculate); gamopetalous; lobed. Corolla tube adaxially deeply split. Corolla valvate; bilabiate; white (rarely), or yellow, or red, or pink, or purple, or blue (with yellow throat). Androecial members definite in number. Androecium 5. Androecial members free of the perianth, or adnate; all equal (ass.); coherent; 1 -whorled. Androecium exclusively of fertile stamens. Stamens 5. Staminal insertion near the base of the corolla tube. Stamens all more or less similar in shape (ass.); isomerous with the perianth; oppositisepalous (at the base of the corolla); all alternating with the corolla members. Anthers cohering; basifixed; dehiscing via longitudinal slits; introrse; tetrasporangiate. Pollen shed in aggregates, or shed as single grains. Gynoecium 2 carpelled. The pistil 1–2 celled. Gynoecium syncarpous; synstylovarious to eu-syncarpous; inferior. Ovary unilocular, or plurilocular; 1–2 locular. Gynoecium stylate. Styles 1; bearing an ‘indusium’ beneath the stigma. Indusium cupular, or two-lipped, or globular. Styles apical. Stigmas 1; 2 - lobed. Placentation axile. Ovules in the single cavity 1; 1 per locule; ascending; non-arillate; anatropous.

Fruit and seed features. Fruit fleshy, or non-fleshy; indehiscent; a drupe, or a nut; 1 celled (per locule). Seeds copiously endospermic. Endosperm oily. Seeds winged, or wingless. Cotyledons 2. Embryo straight.

Special features. The upper lip of the corolla incorporating 2 members, the lower 3; (posterior, adaxial) lip of the corolla bilobed. Lower (abaxial) lip of the corolla 3 lobed.

Etymology. After William Dampier (1652–1715), English navigator; visited the northwest coast of Western Australia in 1688 and 1699; named Rosemary Island, off the present town of Dampier, on account of a bush, probably Olearia axillaris, which reminded him of English rosemary. Collected some 17 plants in Western Australia which were the first Australian plants to reach European herbaria; about a dozen are still preserved in the Oxford herbarium.

Taxonomic Literature

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.

Australian Biological Resources Study (1992). Flora of Australia. Volume 35, Brunoniaceae, Goodeniaceae. Australian Govt. Pub. Service. Canberra.

Rajput, M. T. M.; Carolin, R. C. (1988). The genus Dampiera (Goodeniaceae) : systematic arrangement, nomenclatural notes and new taxa.