Two new species of Centella (Umbelliferae) with notes on the infrageneric taxonomy

Abstract

Schubert, M. T. R. & Van Wyk, B.‐E. 1995. Two new species of Centella (Umbelliferae) with notes on the infrageneric taxonomy. ‐ Nord. J. Bot. 15: 167–171. Copenhagen. ISSN 0107–055X.Two highly localized new species, Centella ternata and C. umbellata are described. Both species are unusual in having three bisexual flowers per umbellule. In C. umbellata the umbellules are arranged in two‐ to five‐rayed umbels, and the latter are borne on a distinct leaf‐opposed peduncle, while they (the rays) are single and axillary in C. ternata. On the basis of the three‐flowered umbellules, both species could be accommodated in Trisanthus but this would make the subgenus paraphyletic. The known geographical distributions and diagnostic characters are described and illustrated.