A new species of dragon's blood Croton (Euphorbiaceae) from Serra dos Orgaos (Rio de Janeiro, Brazil)

被引：6
|
作者：
de Farias, Sabrina Queiroz [1 ]
Medeiros, Debora [1 ]
Riina, Ricarda [2 ]
机构：
[1] Univ Fed Rio de Janeiro, Museu Nacl, Dept Bot, Quinta Boa Vista S-N, BR-20940040 Rio De Janeiro, RI, Brazil
[2] CSIC, RJB, Plaza Murillo 2, Madrid 28014, Spain
来源：
PHYTOKEYS | 2019年 / 126期
关键词：
Atlantic Rain Forest; Croton sect. Cyclostigma; Neotropics; taxonomy; MOLECULAR PHYLOGENETICS; SECRETORY STRUCTURES; SECTION CYCLOSTIGMA; DIVERSITY; SANGRE;
D O I：
10.3897/phytokeys.126.35649
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Croton rizzinii Farias & Riina, sp. nov. is a new species from Serra dos Orgaos National Park in the Atlantic Rain Forest domain (Rio de Janeiro state, Brazil). It is known from the municipalities of Guapimirim, Teresopolis and Petropolis, where it grows in montane ombrophilous dense forest, between 500 and 1500 m elevation. This arborescent species belongs to Croton section Cyclostigma Griseb., a Neotropical lineage distributed in forest habitats from Mexico to northern Argentina. It is mainly characterised by its laciniate-glandular stipules, bracts with two inconspicuous glands (colleters) at the base and campanulate pistillate flowers with sepals covering the ovary. We describe and illustrate the new species, and compare it with close relatives occurring in the Atlantic Rain Forest. We also provide a distribution map, habitat information and suggestions for the assessment of its conservation status.
引用
收藏
页码：13 / 24
页数：12
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