Family: Amaranthaceae
Rhagodia
Citation:
R. Br., Prod. Fl. Nov. Holl. 408 (1810).
Derivation: Greek rhagodes, bearing berries.
Synonymy: Not Applicable Common name: Rhagodias.
Description:
Dioecious shrubs, somewhat mealy (at least when young) with globular hairs which may collapse to form a scurfy or a continuous silvery sheen; leaves opposite or alternate, simple, entire or bluntly lobed at the base.
Flowers small, clustered, forming panicles or spike-like thyrses; perianth globular; segments 5, shortly united at the base, often spreading and enlarged in fruit; male flowers: stamens 5, usually united into a disc at the bale that is puberulous or woolly within (rarely glabrous); female flower: if terminal then with staminodes and a woolly disc; if lateral then with small glabrous staminodes or these absent; ovary glabrous; stigmas 2, sessile.
Fruit a depressed-globular berry c. 3 mm diam.; pericarp succulent; seed horizontal, lenticular, 1-1.5 mm diam.; testa crustaceous, black, smooth to reticulate; embryo circular; perisperm copious, central.
Distribution:
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11 species, all endemic to Australia. (P. G. Wilson (1983) Nuytsia 4:213-235.)
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Biology:
No text
Key to Species:
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1. Leaves c. 3 mm long; intricately branched spinescent shrubs |
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R. ulicina 8. |
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1. Leaves more than 3 mm long or plant not spinescent |
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2. Perianth glabrous or almost so |
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R. preissii 6. |
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3. Leaves becoming scaly and covered with a silvery sheen; staminodes present in female flowers |
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4. Leaves flat, papery or slightly fleshy |
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R. candolleana 1. |
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4. Leaves fusiform or semiterete, fleshy |
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R. crassifolia 2. |
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3. Leaves mealy with spherical to irregular shaped vesicular hairs or glabrous (not becoming scaly or forming a sheen) |
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5. Indumentum of spherical or saucer-shaped vesicular hairs |
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6. Leaves narrow-elliptic; lamina mostly 7-10 mm long; female flowers lacking both a disc and staminodes; seed almost smooth |
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R. drummondii 3. |
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6. Leaf-shape variable; lamina 3-20 mm long; lateral female flowers with a disc and often staminodes; seed prominently reticulate |
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R. spinescens 7. |
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5. Indumentum of minute irregularly shaped vesicular hairs |
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7. Leaves broad-obovate or bluntly hastate, flat; inflorescence pyramidal |
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R. parabolica 5. |
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7. Leaves ovate or oblong-ovate, c. 15 mm long, sparsely mealy below with minute hairs; flowers in dense slender spikes sometimes paniculately arranged |
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R. eremaea 4. |
Author:
Not yet available
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