Paulowniaceae
Paulowniaceae is a family with four genera from eastern Asia (Mabberley 2008). Recent molecular studies have shown that it should be accepted as a family of its own (Olmstead & al. 2001, Oxelman & al. 2005). On morphological grounds it was previously included in Scrophulariaceae (e.g. Lambinon & Verloove 2012) or Bignoniaceae (e.g. Mill 2000). It turned out, however, to be more closely related to Orobanchaceae and Phrymaceae.
One genus, Paulownia, is economically important, either as an ornamental or as a timber tree.
Literature:
Chinese Academy of Forestry Staff (1986) Paulownia in China: cultivation and utilization. Asian Network for Biology Sciences: 74 p. [available online at: https://idl-bnc.idrc.ca/dspace/handle/10625/8226]
Edwards G. (2001) Disintegration of the Scrophulariaceae. Amer. J. Bot. 88: 348-361.
Lambinon J. & Verloove F. (avec coll. Delvosalle L., Toussaint B., Geerinck D., Hoste I., Van Rossum F., Cornier B., Schumacker R., Vanderpoorten A. & Vannerom H.) (2012) Nouvelle Flore de la Belgique, du Grand-Duché de Luxembourg, du Nord de la France et des Régions voisines (Ptéridophytes et Spermatophytes). Sixième édition. Jardin botanique national de Belgique, Meise: CXXXIX + 1195 p.
Mabberley D.J. (2008) Mabberley’s plant-book (3th ed.). Cambridge University Press, Cambridge: XVIII + 1021 p.
Mill R.R. (2000) Paulownia. In: Cullen J. & al. (eds.), The European Garden Flora, vol. 6. Cambridge University Press, Cambridge: 344-345.
Olmstead R.G., dePamphilis C.W., Wolfe A.D., Young N.D., Elisons W.J. & Reeves P.A. (2001) Disintegration of the Scrophulariaceae. American Journal of Botany 88: 348-361.
Oxelman B., Kornhall P., Olmstead R.G. & Bremer B. (2005) Further disintegration of the Scrophulariaceae. Taxon 54: 411-425.