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Abstract Detail

Floristics & Taxonomy

Harley , Raymond Mervyn [1].

Subtribe Hyptidinae (Lamiaceae) in the Flora of North America.

Subtribe Hyptidinae (Lamiaceae Tribe Ocimeae) is a tropical group of plants, mostly confined to the New World, with almost 400 species. Previously there were nine genera recognized, including the genus Hyptis, which totalled over 280 species, to which at that time all North American species of Hyptidinae belonged. However, in 2012, as a result of a molecular analysis of subtribe Hyptidinae, the genus Hyptis was found to be polyphyletic. This was resolved by dividing it into 19 smaller genera. The main centre of diversity of the Hyptidinae is in Brazil, where all genera, except for the Central American Asterohyptis, occur. North America has only seven species of the subtribe, today represented by four genera, confined to either the subtropical Southeastern states centered on Florida (six species),or to the Sonoran Desert Region in the South-west (one species). These are: Cantinoa americana, Cantinoa mutabilis, Condea emoryi, C. floribunda, C.verticillata, Hyptis alata and Mesosphaerum pectinatum. The new generic classification, and the distribution and status of the seven American species, together with the characters by which they can be recognized, will be discussed.

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1 - Royal Botanic Gardens, Kew, Herbarium, Kew Green,, Richmond-upon-Thames, Surrey, TW9 3AB, UK

North America

Presentation Type: Oral Paper
Session: 46, Floristics & Taxonomy
Location: 105/Mayo Civic Center
Date: Wednesday, July 25th, 2018
Time: 4:00 PM
Number: 46010
Abstract ID:755
Candidate for Awards:None

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