Description: Shrubs, glabrous or with simple or stellate hairs, unarmed; branchlets smooth.
Leaves alternate, simple, glandular-punctate, margins entire or rarely toothed.
Inflorescences axillary or terminal, cymose or flowers solitary; bracteoles 2, medial on slender pedicels. Flowers bisexual, 5-merous. Sepals free. Petals 5, valvate, free or united, usually glabrous. Stamens 10, free, divergent; filaments terete, glabrous; anthers versatile, apex not glandular. Carpels 5, glabrous or stellate-hairy, apex sterile; styles fused, arising from about the middle of the carpels; stigma minutely lobed; ovules 2 in each carpel.
Fruit of 1–5 cocci; cocci not transversely ridged, with a rounded or beaked apex; seeds sub-reniform, c. 3 mm long, smooth.
Distribution and occurrence: World: 22 spp., Aust. & N.Z. Aust.: 21 spp. (endemic), Qld, N.S.W., Vic., Tas., S.A.
Refs Weston & Porteners (1991c), Wilson (1970, 1998d).
Taxa not yet included in identification key
| ||Key to the species|| |
|1||Petals <6 mm long, ± spreading; stamens ± equal to or slightly longer than petals||2|
|Petals >7 mm long, erect; stamens considerably exceeding petals||12|
|2||Leaves 2.5–4 cm wide, base stem-clasping||Leionema ambiens|
|Leaves <2 cm wide, base not stem-clasping|
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|3||Leaves hairy on lower surface||4|
|Leaves glabrous on lower surface|
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|4||Leaves pilose or coarsely stellate on lower surface; inflorescences terminal||Leionema diosmeum|
|Leaves minutely white stellate-pubescent on lower surface; inflorescences axillary|
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|5||Apex of leaves 2-toothed, leaves 2–8 cm long, margins recurved to revolute, entire to finely toothed; inflorescences >10 mm long, c. 10-flowered||Leionema dentatum|
|Apex of leaves entire, leaves 0.8–2 cm long, margins entire; inflorescences usually <10 mm long, 1–3-flowered|
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|6||Ovary globose, white stellate-pubescent or rarely glabrous; species of southern alpine and subalpine regions (ST)||Leionema phylicifolium|
|Ovary narrow-ovoid, glabrous; confined to the Blue Mtns (CT)|
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|7||Stems strongly angled, glabrous; leaves 3–7 cm long, narrow-elliptic to oblanceolate, margins finely and regularly toothed, apex acute||Leionema coxii|
|Stems terete to slightly angled, glabrous or hairy; leaves 0.6–5 cm long, margins usually entire or sometimes minutely erose or crenate, variously shaped|
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|8||Inflorescences axillary, terminal peduncles absent; leaves linear to narrow-oblong or narrow-elliptic, with recurved to revolute margins||Leionema phylicifolium|
|Inflorescences mostly terminal, terminal peduncles present; leaves linear- to broad-spathulate or ± circular, obovate or elliptic, with flat to recurved margins|
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|9||Leaves >13 mm long||10|
|Leaves <13 mm long|
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|10||Leaves spathulate to oblanceolate, obovate or oblong, 3–10 mm wide||Leionema elatius|
|Leaves linear-oblanceolate, 2–3 mm wide|
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|Leionema sp. Colo River (P.H. Weston 2423)|
|11||Stems warty, minutely hairy in longitudinal lines or all over; leaves erect to spreading, not imbricate, 2–4 mm wide.||Leionema lamprophyllum|
|Stems not warty, minutely stellate-hairy all over; leaves erect and ± imbricate, 4–6 mm wide.|
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|12||Petals fused||Leionema sympetalum|
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|13||Stems glabrous, strongly angled||Leionema ralstonii|
|Stems pilose or tomentose, ± terete|
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|14||Leaves ± spreading, ovate to lanceolate, c. 1 cm long, obtuse; stems pilose||Leionema carruthersii|
|Leaves ± erect, narrow-oblong to elliptic, 2–4 cm long, retuse; stems stellate-tomentose|
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