Cardiostigma hintonii (R.C. Foster) Ravenna Cardiostigma hintonii (R.C. Foster) Ravenna in Not. Mens. Mus. Nac. Hist. Nat. 249: 7-8. 1977 sec. Munguía-Lino & al. 2017≡Sphenostigma hintonii R.C. Foster in Contr. Gray Herb. 155: 14-15. 1945 syn. sec. Espejo-Serna & López-Ferrari 2008