Gradyana (Euphorbiaceae): a New Genus from Northeastern Brazil

被引：6

作者：

Athie-Souza, Sarah Maria ^{[1
]}

de Melo, Andre Laurenio ^{[2
]}

da Silva, Marcos Jose ^{[3
]}

de Oliveira, Luciana dos Santos Dias ^{[1
]}

de Sales, Margareth Ferreira ^{[1
]}

机构：

[1] Univ Fed Rural Pernambuco, Dept Biol, Programa Posgrad Bot, BR-52171900 Recife, PE, Brazil

[2] Univ Fed Rural Pernambuco, Unidade Acad Serra Talhada, BR-56900000 Serra Talhada, PE, Brazil

[3] Univ Fed Goias, Inst Ciencias Biol, BR-74001970 Goiania, Go, Brazil

来源：

SYSTEMATIC BOTANY | 2015年 / 40卷 / 02期

关键词：

Adenopeltis; carpidiophore; Hippomaneae; Stillingia; CLASSIFICATION;

D O I：

10.1600/036364415X688781

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Gradyana franciscana, a new genus and species of Euphorbiaceae found in the Sao Francisco river valley, in the semiarid region of northeastern Brazil, is herein described and illustrated. Gradyana is morphologically close to Stillingia due to the presence of carpidiophore and foliar glands, but differs in possessing strictly axillary sinuous thyrsoid staminate inflorescences, solitary pistillate flowers, apical glands in the bracts, long-stipitate glands between pistillate sepals, and staminate flowers with three stamens and three sepals. A key to differentiate Gradyana from other genera of the tribe Hippomaneae occurring in South America is presented. Comments about its geographic distribution, habitat, and conservation status are also provided.

引用

页码：527 / 533

页数：7

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