Syrmatium belonged to a group of species traditionally placed in the tribe
Loteae of the subfamily
Faboideae. The taxonomy of this group is complex, and its division into genera has varied considerably. Many species of
Syrmatium were formerly placed in a broadly defined genus
Lotus. A
molecular phylogenetic study in 2000 based on nuclear ribosomal ITS sequences confirmed the view that the "New World" (American) and "Old World" (African and Eurasian) species of
Lotus did not belong in the same genus.
Syrmatium was
monophyletic.
Species Species that have been placed in
Syrmatium include: •
Syrmatium argophyllum (A.Gray) Greene =
Acmispon argophyllus (A.Gray) Brouillet •
Syrmatium cytisoides (Benth.) Greene =
Acmispon cytisoides (Benth.) Brouillet •
Syrmatium decumbens (Benth.) Greene =
Acmispon decumbens (Benth.) Govaerts •
Syrmatium distichum Greene =
Acmispon distichus (Greene) Brouillet •
Syrmatium haydonii (Orcutt) Brand =
Acmispon haydonii (Orcutt) Brouillet •
Syrmatium junceum Benth.) Greene =
Acmispon junceus (Benth.) Brouillet •
Syrmatium leucophyllum (Greene) Brand =
Acmispon procumbens (Greene) Brouillet var.
procumbens •
Syrmatium micranthum (Nutt. ex Torr. & A.Gray) Greene =
Acmispon micranthus (Nutt. ex Torr. & A.Gray) Brouillet •
Syrmatium prostratum (Nutt.) Greene =
Acmispon prostratus (Nutt.) Brouillet •
Syrmatium tomentosum (Hook. & Arn.) Vogel =
Acmispon tomentosus (Hook. & Arn.) Govaerts •
Syrmatium veatchii (Greene) Greene =
Acmispon dendroideus var.
veatchii (Greene) Brouillet •
Syrmatium watsonii (Vasey & Rose) Brand =
Hosackia alamosana Rose ==References==