Acta Botanica 35. (1989)

1989 / 1-4. szám - BORHIDI ATTILA: Studies on Rondeletieae (Rubiaceae) XI. Critical notes on some Central American species of Rondeletia s. l.

Acta Botanica Hungarica 35(1-4), pp. 309-312 (1989) STUDIES ON RONDELETIEAE (RUBIACEAE) XI; CRITICAL NOTES ON SOME CENTRAL AÍCRICAN SPECIES OF RONOELETIA S.L. A. BORHIDI Janus Pannonius University, Botanical Department, Pécs, Hungary Institute of Ecology and Botany, Hungarian Academy of Sciences, H-2163 Vácrátót Studies carried out in the Herbarium of Missouri Botanical Garden (MO) on further Central American taxa classified into the genus Rondeletia L. permitted to make some new taxonomic decisions. Among the investigated 21 taxa of Rondeletia s.l. 19 proved to belong to the genus Arachnothryx Planch, and 2 to Rogiera Planch. The correspondent nomenclatural changes are composed in the article. Separation of Arachnothryx from Rondeletia was suggested at first by STEYERMARK (1967) for the South American taxa and later by BORHIDI (1982) for the Central American species. The author of this paper strengthened to make further distinctions at generic level revalidating the genus Rogiera (BORHIDI, 1982) and describing a new genus, Javorkaea (BORHIDI and JÁRAI­­K0MLÚDI, 1983). These taxonomic decisions has been recently supported by the karyological studies of KIEHN (1988), who found different basic numbers in Arachnothryx (x = 9), Rogiera (x = 10) and Rondeletia (x = 11). According to these results a number of new combinations was sug­gested (BORHIDI, 1982, 1987). One of them later turned to be not correct. Namely Rondeletia hameliifolia Dwyer and Haydon of Panama is a really good Rondeletia s. str. and not an Arachnothryx as it was proposed by BORHIDI (1982). Some new combinations in the genus Rondeletia related to Central American taxa: Arachnothryx albida (Lundell) Borhidi comb, nova - Mexico. Basionym: Rondeletia albida Lundell Wrightia 5(8): 323. 1976. Akadémiai Kiadó, Budapest

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