Brillantaisia lamium (Nees) Benth.

Daniel, Thomas F., 2020, Notes on the Vascular Flora of the Island of Príncipe (São Tomé and Príncipe) in the Gulf of Guinea, Proceedings of the California Academy of Sciences 66 (15), pp. 341-352 : 345

Brillantaisia lamium (Nees) Benth.

Príncipe: Road /trail from Terreiro Velho to Infante D. Henrique, vicinity of Roça Ribeira to Órgãos Basálticos / Os Dois Irmãos (01°35.002ʹN, 007°25.539ʹE, 115 m) to Rio Chibala (01°34.442ʹN, 007°25.218ʹE, 80 m), second growth forest and disturbed areas, 20 IV 2013 (flr, frt), T. Daniel et al. 12023 ( CAS)-purple corollas; same locale, 20 IV 2013 (flr, frt), T. Daniel et al. 12024 ( CAS)-white corollas .

In a taxonomic revision of Brillantaisia P. Beauv., Sidwell (1998:74) noted that plants with entirely white corollas were occasionally found among the otherwise usually blue-purple to violetflowered species, including B. lamium and B. vogeliana , both of which occur in São Tomé and Príncipe. Daniel and Figueiredo (2009:646 and fig. 3 G, H) noted the occurrence of both purplish- and white-flowered plants of B. vogeliana on São Tomé, which species only occurs on that island in the country. Brillantaisia lamium occurs on both islands, but the occurrence of both color forms for this species was noted only for São Tomé (Daniel and Figueiredo 2009). Both color forms of B. lamium are documented above on Príncipe, as well. Additional collections of B. lamium with both purple to blue-purple and white corollas have been made elsewhere on the island. Plants with corollas having a somewhat intermediate coloration, mostly white but with a faint lavender tinge, also occur in Príncipe (e.g., Daniel et al. 11695 at CAS, from ca. 2 km south of Bela Vista along the Rio Papagaio).