Hmm, you might be right there. To my mind, and after consulting Stace3, it looks like we have these 2:
Concept A:
Medicago sativa nothosubsp. varia (Martyn) Arcang. (Nothosubspecies, flowering plant) NON-NATIVE TERRESTRIAL
=Medicago sativa subsp. sativa L.
=Lucerne
=Alfalfa
Concept B:
Medicago sativa subsp. varia (Martyn) Arcang. (Subspecies, flowering plant)
=Medicago x varia Martyn
=Medicago falcata x sativa Martyn
=Sand Lucerne
=Hybrid Lucerne
To me, "Medicago sativa nothosubsp. varia (Martyn) Arcang." needs to move to be the recommended name of concept B. Then "Medicago sativa subsp. sativa L." should be promoted to be the recommended name of concept A. What do you think?
Chris Raper, Manager of the UK Species Inventory, Angela Marmont Centre for UK Biodiversity,
Natural History Museum, Cromwell Road, London, SW7 5BD. (tel: 020 7942 5894)
also Tachinid Recording Scheme (http://tachinidae.org.uk/)