Family: Fabaceae
Daviesia
Citation:
Smith, Trans. Linn. Soc. 4:220 (1798).
Derivation: After the Rev. Hugh Davies, Welsh Botanist, 1739-1821.
Synonymy: Not Applicable Common name: Bitter-peas.
Description:
Shrubs or undershrubs; leaves replaced by phyllodes, spirally arranged, entire, terete, or lamina flattened horizontally or vertically, sometimes spinescent, sometimes decurrent along the stem or reduced to short prickles or teeth or wanting; stipules minute or wanting.
Flowers pedicellate, usually yellow-orange and red, in axillary racemes, rarely in pedunculate umbels or short clusters, rarely solitary or terminal; bracts at the bases of racemes or pedicels scale-like, sometimes enlarged in fruit; bracteoles wanting; calyx with 5 short equal teeth or 2-lipped when the upper 2 lobes are connate and truncate; petals on a slender claw; standard usually with a dark centre, orbicular or broad, emarginate, about as long as the obovate wings and curved crimson keel; stamens free, rarely slightly cohering; ovary shortly stipitate, glabrous, tapering into a subulate style with a minute terminal stigma, 2-ovulate.
Pod subsessile or stipitate, triangular, upper suture nearly straight, the lower much curved, forming almost a right angle, more or less compressed; seed usually 1, with a large aril.
Distribution:
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Endemic in Australia with about 100 species.
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Biology:
No text
Taxonomic notes:
The genus is being revised by Dr M.D. Crisp who assisted with taxonomic and nomenclatural problems.
Key to Species:
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1. Phyllode lamina flat horizontally, articulate, pungent or not |
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2. Phyllodes never pungent |
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3. Inflorescence a raceme; calyx upper 2 teeth forming a broad, emarginate lip; branchlets squarish; phyllodes greenish |
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D. leptophylla 7. |
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3. Inflorescence an umbel (with a rosette of bracts beneath the pedicels); calyx with 5 equal acuminate teeth; branchlets triquetrous, winged; phyllodes glaucescent |
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D. stricta 9. |
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2. Phyllodes with an acuminate pungent point |
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4. Phyllodes broad-cordate (rarely narrow); keel narrow-elliptic, incurred, beaked |
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D. arenaria 1. |
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4. Phyllodes narrow-ovate to lanceolate, cuneate; keel triangular, narrowed to the base, obtuse |
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5. Leaves broadest near the apex, midrib and lateral veins visible; calyx teeth flat, more or less recurved, margins entire; standard broad-obcordate |
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D. arthropoda 3. |
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5. Leaves usually broadest at or below the middle, midrib only visible; calyx teeth keeled, incurved, margins fimbriate; standard transverse-elliptic |
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D. ulicifolia I0. |
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1. Phyllode lamina flat vertically or terete, articulate or continuous with the stem, pungent, or absent |
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6. Phyllodes absent or if present terete and few irregularly spaced at the ends of branchlets, perpendicular to and continuous with branchlets; branchlets and phyllode base c. 3 mm diam. (raceme up to 12 mm) |
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D. benthamii 4. |
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6. Phyllodes regularly spaced and present along the entire length of the branches, flat or terete, continuous or articulate |
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7. Phyllodes flat, strongly decurrent by a 3-10 mm broad and long base, usually perpendicular to the branchlets, blue-grey |
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D. pectinata 8. |
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7. Phyllodes, if decurrent, scarcely so, terete or flat |
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8. Phyllodes flat, articulate, subulate or linear-falcate and dilated upwards; phyllodes and branches striate; striation on branches scabridulous |
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D. asperula 2. |
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8. Phyllodes terete (rarely slightly compressed); striation if present not scabridulous |
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9. Phyllodes continuous with the stem, less than 5 mm long, stout, slightly recurved, oblique to the stem; pod c. 10 mm long, inflated |
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D. brevifolia 5. |
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9. Phyllodes, articulate, usually more than 10 mm long, quite straight and slender; pod less than 10 mm long, compressed |
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D. genistifolia 6. |
Author:
Not yet available
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