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Issue: Vol. 361 No. 3: 20 July 2018
Type: Article
Published: 2018-07-20
DOI: 10.11646/phytotaxa.361.3.5
Page range: 294–300
Abstract views: 17
PDF downloaded: 1

Ottelia guanyangensis (Hydrocharitaceae), a new species from southwestern China

Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, CN-430074, China University of Chinese Academy of Sciences, Beijing, CN-100049, China
Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, CN-430074, China Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, CN-430074, China
Guangxi Institute of Botany, Chinese Academy of Sciences, Guilin, CN-541006, China
Guangxi Institute of Botany, Chinese Academy of Sciences, Guilin, CN-541006, China
Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, CN-430074, China Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, CN-430074, China
Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, CN-430074, China Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, CN-430074, China
Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, CN-430074, China
Phylogenetics bisexual flowers taxonomy Monocots

Abstract

Ottelia guanyangensis (Hydrocharitaceae), a new species from southwestern China, is described and illustrated. This aquatic plant is a perennial, submersed herb with bisexual flowers and a hexagonal-cylindric fruit. It is related to O. acuminata var. songmingensis and O. balansae but differs from these two taxa by its bisexual flowers, spathe with 2–5 flowers, trinerved leaf with obvious cross veins, and a winged, hexagonal-cylindric fruit. Molecular phylogenetic analysis based on nuclear DNA internal transcribed spacer (ITS) sequences and three chloroplast DNA sequences (rbcL, trnK5’ intron and trnS-trnG) resolves O. guanyangensis as a distinct clade, which further justifies its recognition as a new species.