Acta Botanica 38. (1994)
1994 / 1-4. szám - BORHIDI ATTILA: Studies in Rondeletieae, XII. New combinations of Mexican and Central American taxa
Acta Botánica Hungarica 38 (1—4), pp. 139—142 (1993—94) STUDIES IN RONDELETIEAE, XII. NEW COMBINATIONS OF MEXICAN ANO CENTRAL AMERICAN TAXA A. BORHIDI Botanical Department of the Janus Pannonius University, H-7624 Pécs, Ifjúság útja 6, Hungary (Received: 15 May, 1994) New cortiinations of 16 Mexican and Central American species of Rondeletia s.l. are proposed classifying 15 of them to the genus Arachnothryx Planch, and 1 to the genus Roqiera Planch. Introduction A remarkable paper was published by David H. LORENCE (1991), where he described 13 new Rondeletia species from Mexico and Central America. As he pointed out, he wanted to maintain the genus Rondeletia in a broad sense according to HEMSLEY (1879) and HOOKER (1873), although he had not any difficulties to recognize the characters of Arachnothryx and Rogiera on his material. My opinion, explained earlier in several papers (BORHIDI 1982, 1989; BORHIDI and FERNANDEZ 1981a, b), that the generic concept of Rondeletia has to turn back to the original Linnean sense as it was firstly proposed by STEYERMARK (1967) who revalidated the genus Arachnothryx and excluded Rondeletia schumanniana Krause (a form of Rogiera amoena) from the genus Rondeletia. For a more detailed critical discussion and argumentation of this question, see the article in the next volume. According to our generic concept the following new combinations are proposed: Arachnothryx affinis (Hemsl.) Borhidi comb. nova — Mexico Basionym: Rondeletia affinis Hemsley Diagn. PI. Nov. Mexic. 2B. 1879. Arachnothryx atravesadensis (Lorence) Borhidi comb, nova — Mexico Basionym: Rondeletia atravesadensis Lorence in Novon, 1: 137. 1991. 0236-6495/93—94/2 4.00 © 1993-94 Akadémiai Kiadd, Budapest