Brzonia monophylla Pavon ① Q.DC. Prod. xv'. 284 (1864) ② Q.DC. in Ann. Sci Nat. ser. 4. XI. 120 (1859) * actually ② is earlier but ① is more detailed & precise. and should be cited first. Ann. Sci Nat. p. 121 B. monophylla (h. Boiss.), acaulio, folio unico late rotundato peltati- vel palmati-12-15-nervio undulato denticulato utringues petiologue piloso, scape folio multo longioris piloso apice bis truus dichotomo, bracteis late ovatis faciniatis persistentibus, f. maso. dispalio digitalio, fun. lobis 5, capsulas alis inasqualibus ovato- triangularibus. In Mexico (Pavon).