Asteraceae of Serra da Confusão do Rio Preto, Quirinópolis, Goiás, Brazil

Abstract A floristic inventory and a taxonomic treatment of Asteraceae from Serra da Confusão do Rio Preto in the state of Goiás are provided. Collections were carried out from July 2017 to December 2018 in a fragment of cerrado sensu stricto with transition to cerrado rupestre (rocky cerrado), for a total of 38 expeditions covering all seasons. Taxonomic treatment of the resulting specimens includes identification keys, diagnoses and descriptions, conservation status, endemism and examined material. A total of 59 species were found, belonging to 32 genera and 10 tribes. The predominant genera were Lessingianthus (8 spp.) and Chromolaena (5 spp.) while the predominant tribes were Vernonieae (19 spp.), Eupatorieae (13 spp.) and Heliantheae (7 spp.). The richness pattern for tribes was the same as recorded in other floristic inventories in the Cerrado domain, especially cerrado sensu stricto. Twenty-one of the species (35.6%) are restricted to Brazil while only Isostigma resupinatum is restricted to the state of Goiás. Conyza primulifolia, Lepidaploa cuiabensis and Lepidaploa sororia were new occurrences for the state.

摘要：本文报道了巴西戈亚斯州里约普雷图孔富桑山（Serra da Confusão do Rio Preto）菊科（Asteraceae）植物的区系清查与分类学处理。调查采集工作于2017年7月至2018年12月开展，采样区域为一片向岩石塞拉多（rocky cerrado）过渡的狭义塞拉多（cerrado sensu stricto）植被片段，累计完成覆盖全季节的38次野外考察。针对所获标本的分类学处理包含鉴定检索表、类群诊断与形态描述、保护现状评估、特有性分析以及检视标本清单。本次调查共记录59个物种，隶属于10族32属。优势属为莱辛菊属（Lessingianthus，8种）与假泽兰属（Chromolaena，5种）；优势族依次为斑鸠菊族（Vernonieae，19种）、泽兰族（Eupatorieae，13种）与向日葵族（Heliantheae，7种）。该区域菊科各族的物种丰富度格局与塞拉多生物群区（尤其是狭义塞拉多）的其他区系调查结果一致。其中21个物种（占比35.6%）为巴西特有种，仅反卷异柱菊（Isostigma resupinatum）为戈亚斯州特有种。白酒草属的Conyza primulifolia、鳞菊属的Lepidaploa cuiabensis与Lepidaploa sororia为该州的新分布记录。