منابع مشابه
Morphology and Pollination Biology of an Intersectional Hybrid of Costus (Costaceae)
An intersectional hybridization event between hummingbird-pollinated Costus pulverulentus (sect. Ornithophilus) and large bee-pollinated C. guanaiensis var. macrostrobilus (sect. Costus) in Belize, Central America, is documented by analyses of morphology and pollination biology. Morphologically the hybrid is intermediate between the parental species and retains floral characteristics adaptive t...
متن کاملRapid speciation and the evolution of hummingbird pollination in neotropical Costus subgenus Costus (Costaceae): evidence from nrDNA ITS and ETS sequences.
We estimate phylogenetic relationships and the biogeographic and pollination history of Costus subgenus Costus (Costaceae) using sequence data from the internal and external transcribed spacer (ITS and ETS) regions of 18S-26S nuclear ribosomal DNA. The African members of the subgenus form a series of lineages basal to a monophyletic neotropical species radiation. The neotropical species have la...
متن کاملA new phylogeny-based generic classification of Costaceae (Zingiberales)
Costaceae is one of the most easily recognizable groups within the Zingiberales, distinguished from other families within the order by well-developed and sometimes branched aerial shoots that have a characteristic monistichous (one-sided) spiral phyllotaxy (e.g., Kirchoff & Rutishauser, 1990). Its close relationship with Zingiberaceae is evidenced by its former placement as a subfamily within t...
متن کاملChemical Assessment and Antimicrobial and Antioxidant Activities of Endophytic Fungi Extracts Isolated from Costus spiralis (Jacq.) Roscoe (Costaceae)
Costus spiralis (Costaceae) is a species native to the Amazon region and is used in traditional medicine. The endophytic fungi used in this study were obtained from leaves of this plant. 13 strains were selected to obtain hydroethanolic extracts and were submitted to hydroalcoholic extraction and evaluated for antioxidant activity by DPPH (2,2-difenil-1-picrilhidrazil) and FRAP (ferric reducing...
متن کاملCostus loangensis, an exciting new species from Gabon, Africa
A new species of spiral ginger (Costus: Costaceae) from Gabon, Africa is described. Costus loangensis H. Maas & Maas is found in the coastal region on white sand soils under a tropical rain forest canopy. It is morphologically distinct from all other African species of Costus but shows some similarities in floral form with the savanna-inhabiting Costus spectabilis (Fenzl) K. Schum. and similari...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1990
ISSN: 0006-8071
DOI: 10.1086/337808