Russell Lupin
Scientific name: Lupinus x regalis Bergmans (= Lupinus arboreusx Lupinus polyphyllus)
Diagnostic features
Much closer to Lupinus polyphyllus.
Stems erect, usually at least sparingly branched, to 1.5m, with more than 1 inflorescence, with rather sparse short hairs.
Leaflets (7)9-15, mostly more than 6cm, oblanceolate to narrowly elliptic, acute to acuminate.
Lower lip of calyx 5-8mm.
Corolla various colours.
Habitat
Native; commonly grown and frequently well naturalized on rough ground, banks of roads and railways.
Distribution
Throughout lowland Britain; garden origin, but spontaneous hybrids also occur in Moray, Wigtowns and Midlothian with the parents, and perhaps also backcrosses from naturalized Lupinus x regalis to Lupinus arboreus. Garden escapes are usually recorded as Lupinus polyphyllus, but this is now very rarely grown and probably all modern records outside Scotland are Lupinus x regalis.
This hybrid is keyed out on Page 2969 in the Text Key.
Hybrids
- Lupinus regalis(x) x Lupinus nootkatensis probably occurs on river-shingle with the parents in Moray and Mid Perth, but is difficult to identify; it is intermediate and fertile. |
