Epilobium billardiereanum Ser. APNI* Synonyms: Epilobium billardierianum Ser. APNI*
Description: Erect stoloniferous perennial herbs to c. 100 cm high; stems pubescent with crisped hairs, occasionally restricted to lines decurrent from the leaf bases, often with erect glandular and non-glandular hairs in the flowering region; exfoliating and often woody near the base.
Leaves linear to ovate, 0.5–4 cm long, 1–18 mm wide, variously toothed, ± sessile.
Flowers usually with a conspicuous ring of long hairs inside the hypanthium. Petals to 13 mm long, purplish pink or white.
Fruit 3–7.5 cm long; pubescent, often with glandular or erect hairs; pedicel to 6–20 mm long; seeds c. 1 mm long, papillose, comose.
Flowering: spring–summer.
Distribution and occurrence: Widespread in moist sites.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS, CWS, SWS, SWP, LHI
Other Australian states: Qld Vic. Tas. S.A. W.A.
Text by J. M. Dalby
Taxon concept:
| | Key to the subspecies | |
| 1 | Leaves ovate to narrow-ovate, 6–18 mm wide, with 16–40 small regular teeth on each side. Stems little-branched, without glandular or non-glandular erect hairs in the flowering region | subsp. billardiereanum |
| Leaves linear or lanceolate to narrow-ovate, 1–15 mm wide, finely or coarsely toothed, with up to 20 teeth on each side. Stems branched or unbranched. Flowering region usually with glandular hairs. Flowers purplish, pink or white | 2 |
| 2 | Leaves linear to narrow-elliptic, 1–5 mm wide, often hirsute, coarsely toothed with up to 8 teeth on each side. Stems well-branched with glandular or non-glandular hairs in the flowering region. Flowers usually purplish pink | subsp. cinereum |
| Leaves lanceolate to narrow-ovate, >5 mm wide, usually finely toothed with up to 20 teeth on each side. Stems branched or unbranched. Flowers purplish, pink or white
Back to 1 | 3 |
| 3 | Leaves lanceolate to narrow-ovate, 5–15 mm wide, with 4–12 small regular teeth on each side. Stems well branched with erect hairs in the flowering region. Flowers purplish pink or white | subsp. hydrophilum |
| Leaves mostly lanceolate, 4–12 mm wide, with 6–20 small irregular teeth on each side; margins often undulate. Stems branched or unbranched, often with erect hairs in the flowering region. Flowers pale purplish pink or white
Back to 2 | subsp. intermedium |
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***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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