Leaves of Physalis mollis var. mollis demonstrating the extremely hairy leaf undersides (left) that are a key feature of this species. This species is native to the US, and this individual was probably collected in Texas or Arkansas.
Kohler's Medizinal-Pflanzen in naturgetreuen Abbildungen mit kurz erlauterndem Texte :.Gera-Untermhaus :Fr. Eugen Kohler,[1883-1914].biodiversitylibrary.org/page/303626
Distimake tuberosus (L.) Simes & StaplesMerremia tuberosa (L.) RendleCONVOLVULACEAE"Os frutos, quando secos, so cpsulas esfricas rijas, envolvidas pelas spalas que [adquirem] consistncia lenhosa, de cor de madeira, da o nome "flor-de-pau"."Origem: Regies tropicais das Amricas, frica e sia. No Brasil ocorre na Mata Atlntica.Ref.: a) Lorenzi, H. e Souza, H.M. Plantas Ornamentais no Brasil. 4 edio. Plantarum, 2008.; b) Lista de Espcies da Flora do Brasil. Jardim Botnico do Rio de Janeiro, 2010. c) Simes, A.R. & Staples, G. Dissolution of Convolvulaceae tribe Merremieae and a new classification of the constituent genera. Botanical Journal of the Linnean Society, 2017, 183, 561586.