Foram registradas dez espécies do gênero Aechmea no Estado de Pernambuco: A. aquilega (Salisb.) Griseb., A. eurycorymbus Harms, A. fulgensBrongn., A. lingulata (L.) Baker, A. mertensü(G. Mey.) Schult. f., A. mulfordii L. B. Sm., A. murícata(Arruda) L. B. Sm., A. stelligera L. B. Sm., A. tomentosa M&z e A. werdermannii Harms. Duas espécies são endêmicas (A. murícata e A. werdermannii) e uma nova ocorrência (A. stelligerd) foi referida para Pernambuco. São apresentados chave, descrições, ilustrações e comentários das espécies estudadas.
Abstract—Phylogenetics work revealed that Aechmea subg. Chevaliera is not a monophyletic group. Seven species previously assigned to the subgenus form a clade with strong statistical support and in sister position to morphologically distinct members of
other genera. We present morphological and phylogenetic evidence to segregate these seven species in a new genus named Karawata, which requires the following new combinations: Karawata depressa, Karawata gustavoi, Karawata hostilis, Karawata
multiflora, Karawata nigribracteata, Karawata prasinata, and Karawata saxicola. Description of the new genus and its seven species, as well as a key for identification, distribution maps, and illustrations are provided.
The inflorescences in Bromeliaceae are indeterminate, supported by a terminal scape of variable size, and with bracts of variable position, number, colour, shape and texture. Aechmea is the most diverse genus of Bromelioideae (c. 220 species) having large inflorescences of variable size and shape. Aechmea subgenus Chevaliera comprises 21 taxa distributed throughout Central and South America, with a centre of species richness in eastern Brazil. A study of the inflorescence morphology of 15 Brazilian species is presented here (A. alopecurus, A. castanea, A. conifera, A. depressa, A. digitata, A. hostilis, A. leucolepis, A. multiflora, A. muricata, A. ornata, A. perforata, A. rodriguesiana, A. saxicola, A. sphaerocephala and Aechmea sp. nov. unpublished). The study was based on living specimens and herbarium material with the inflorescence architecture observed at different developmental stages. The study describes the architectural form of the inflorescences in full flower or with at least half of the flowers open, as fruit development may produce architectural changes in the axis. The inflorescence in the subgenus ranges from simple to compound. Spicate inflorescences are the basic pattern, and a capituliform pattern is reported here for the first time in Bromeliaceae. Compound inflorescences are the rarest form in the subgenus, being represented by racemes of spikes. Descriptions, illustrations and schematic diagrams are presented.
RESUMOAechmea subgênero Chevaliera (Gaudich. ex Beer) Baker está representado na Amazônia brasileira pelas espécies A. fernandae (E. Morren) Baker e A. rodriguesiana (L. B. Sm.) L. B. Sm., sendo a última restrita para esta região. A. rodriguesiana se caracteriza pelas flores dispostas em racemo de espigas, com brácteas florais ovais, margens inteiras, envolvendo o ovário e pelas pétalas alvas e cuculadas. O presente trabalho apresenta a complementação da descrição e ilustrações desta espécie. São apresentados dados de distribuição geográfica, hábitats e fenológicos.
PALAVRAS-CHAVEAechmea, Chevaliera, Bromeliaceae, Amazônia brasileira.
Aechmea rodriguesiana (L. B. Sm.) L. B. Sm. (Bromeliaceae), an endemic species of the Brazilian Amazon
ABSTRACTAechmea subgenus Chevaliera (Gaudich. ex Beer) Baker, is represented in the Brazilian Amazon by two species: A. fernandae (E. Morren) Baker and A. rodriguesiana (L. B. Sm.) L. B. Sm., the latter being restricted to this region. A. rodriguesiana is characterized by flowers arranged on racemes of spikes, oval floral bracts with entire margins that completely surround the ovary, and by cuculate white petals. The present work has as main goal to complement the description and illustration of this species, exclusive to the Brazilian Amazon, allowing its recognition and conservation. Data on geographical distribution, habitat, and phenology are presented.
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