TL;DR: A comprehensive new genus-level classification of the tribe Bignonieae (Bignoniaceae, Lamiales) is based on a well-supported phylogeny based on multiple molecular markers from both chloroplast and nuclear DNA, a morphological survey, and a broad sampling of taxa.
Abstract: The history of classification of the tribe Bignonieae and its genera are reviewed as context for a comprehensive new genus-level classification of the tribe Bignonieae (Bignoniaceae, Lamiales). This new classification is based on a well-supported phylogeny based on multiple molecular markers from both chloroplast and nuclear DNA, a morphological survey, and a broad sampling of taxa. Genera are circumscribed here as clades that are well supported as monophyletic by molecular data and also recognizable by one or more morphological synapomorphies. Perianthomega Bureau ex Baill. is here transferred from Bignoniaceae tribe Tecomeae into Bignonieae, and 21 genera and a total of 393 species are recognized in Bignonieae: Adenocalymma Mart. ex Meisn. (82 species), Amphilophium Kunth (47), Anemopaegma Mart. ex Meisn. (45), Bignonia L. (28), Callichlamys Miq. (1), Cuspidaria DC. (19), Dolichandra Cham. (8), Fridericia Mart. (67), Lundia DC. (13), Manaosella J. C. Gomes (1), Mansoa DC. (12), Martinella Baill. (2), Neojobertia Baill. (2), Pachyptera DC. ex Meisn. (4), Perianthomega (1), Pleonotoma Miers (17), Pyrostegia C. Presl (2), Stizophyllum Miers (3), Tanaecium Sw. (17), Tynanthus Miers (15), and Xylophragma Sprague (7). Several genera are here circumscribed differently from previous classifications, in particular Memora Miers and Sampaiella J. C. Gomes are synonymized with Adenocalymma; Distictella Kuntze, Distictis Mart. ex Meisn., Glaziova Bureau, Pithecoctenium Mart. ex DC., and Urbanolophium Melch. are synonymized with Amphilophium; Cydista Miers, Clytostoma Miers ex Bureau, Macranthisiphon Bureau ex K. Schum., Mussatia Bureau ex Baill., Phryganocydia Mart. ex Bureau, Potamoganos Sandwith, Roentgenia Urb., and Saritaea Dugand are synonymized with Bignonia; Macfadyena A. DC., Melloa Bureau, and Parabignonia Bureau ex K. Schum. are synonymized with Dolichandra; Arrabidaea DC. is synonymized with Fridericia; Gardnerodoxa Sandwith is synonymized with Neojobertia; Leucocalantha Barb. Rodr. is synonymized with Pachyptera; and Ceratophytum Pittier, Periarrabidaea A. Samp., Paragonia Bureau, Pseudocatalpa A. H. Gentry, and Spathicalyx J. C. Gomes are synonymized with Tanaecium. The genera Adenocalymma, Amphilophium, Fridericia, Dolichandra, and Tanaecium are formally emended here as to diagnosis and circumscription. A natural key, complete morphological descriptions, and illustrations characterize the accepted genera, and full generic synonymy and a catalogue of their component species summarize their basic nomenclature and geographic range. Three new names are published: B. neouliginosa L. G. Lohmann replaces Phryganocydia uliginosa Dugand; B. neoheterophylla L. G. Lohmann replaces Cydista heterophylla Seibert; and Tanaecium neobrasiliense L. G. Lohmann replaces Sanhilaria brasiliensis Baill. Thirty-two generic names are newly synonymized, and 144 new nomenclatural combinations are made. A lectotype is designated for one genus, Periarrabidaea A. Samp., and 78 species names. One species name is neotypified, Memora campicola Pilg. (≡ Adenocalymma campicola (Pilg.) L. G. Lohmann).
TL;DR: Since the available scientific literature validates the use of a number of these plants for the ailments they are prescribed for by the Kavirajes and tribal medicinal practitioners, the plants present excellent potential for further scientific studies, which may result in discovery of novel compounds of therapeutic interest.
Abstract: The Bignoniaceae family comprising of about 110 genera and 650 species is a family of flowering plants, commonly known as the Trumpet Creeper family, Jacaranda family, Bignonia family, or the Catalpa family. Plant species belonging to this family are distributed worldwide, but most of them occur in the tropical and sub-tropical countries. However, a number of temperate species also grow in North America and East Asia. Although the family is small, the Bignoniaceae plants are important for their reported bio-active constituents and diverse pharmacological activities. Bignoniaceae family plants are also widely used in traditional medicinal systems of a number of countries, including Bangladesh, where folk and tribal medicinal practitioners use a number of species for treatment of diverse ailments. Since folk medicinal practitioners form the first tier of primary health care in Bangladesh, the objective of the present study was to conduct a review of reported bioactive constituents from this family and compare the traditional medicinal uses of Bignoniaceae family plants in various countries of the world including Bangladesh. Accordingly, a survey was conducted among traditional medicinal practitioners of Bangladesh, which included folk medicinal practitioners (catering to the mainstream population and otherwise known as Kavirajes) as well as tribal medicinal practitioners of various tribes residing within the country. It was observed that the traditional medicinal practitioners use a total of seven Bignoniaceae family species for treatment of ailments like cancer, snake bite, skin disorders, gastrointestinal disorders, respiratory tract disorders, gynecological disorders, hepatic disorders, epilepsy, cholera, pain, urinary problems, malaria, heart problems, and sexually transmitted diseases. The seven species of Bignoniaceae family plants in use were Crescentia cujete, Heterophragma adenophyllum, Oroxylum indicum, Stereospermum suaveolens, Tabebuia argentea, Tecoma gaudichaudi, and Tecoma stans. Since the available scientific literature validates the use of a number of these plants for the ailments they are prescribed for by the Kavirajes and tribal medicinal practitioners, the plants present excellent potential for further scientific studies, which may result in discovery of novel compounds of therapeutic interest.
TL;DR: In this article, the chemical composition of essential oils obtained from Bignonia nocturna by different extraction techniques was evaluated using molecular docking and molecular dynamics, and the results indicated that benzaldehyde strongly interacts with acetylcholinesterase, which is the likely interaction mechanism responsible for the cytotoxicity.
Abstract: Bignonia nocturna (Bignoniaceae) is a plant used for medicinal purposes by the Amazonian indigenous peoples. To date, there have been no reported studies on its toxicity. The present study aimed to evaluate the chemical composition of essential oils obtained from Bignonia nocturna by different extraction techniques. In addition, an in silico study of the molecular interactions was performed using molecular docking and molecular dynamics. The extractions were carried out by hydrodistillation, simultaneous distillation-extraction, and steam distillation, using samples collected from the Amazon in summer and winter. The chemical composition was analyzed by GC/FID and GC/MS, and the cytotoxic activity in Artemia salina Leach was evaluated. The maximum yield (1.38 % w/w) was obtained by hydrodistillation. The results indicated that benzaldehyde predominated in all the fractions of both the volatile concentrate and the essential oils. In addition, the oil proved to be highly toxic to Artemia salina. The computer simulation results indicated that benzaldehyde strongly interacts with acetylcholinesterase, which is the likely interaction mechanism responsible for the cytotoxicity.
TL;DR: The Pyrostegia C. Presl is a genus of four species in the tribe Bignonieae as mentioned in this paper, which are lianas with compound leaves with two leaflets and a terminal tendril, campanulate calyces, narrow corollas with lobes valvate basally in bud, four exserted stamens, compressed, linear capsules that dehisce parallel to the septum, and thin, bialate seeds.
Abstract: Pyrostegia C. Presl is a genus of four species in the tribe Bignonieae. All the species are lianas with compound leaves with two leaflets and a terminal tendril, campanulate calyces, narrow corollas with lobes valvate basally in bud, four exserted stamens, compressed, linear capsules that dehisce parallel to the septum, and thin, bialate seeds. Three of the species are apparently hummingbird pollinated and have flowers that are very similar in appearance with red-orange (rarely yellow), narrow tubular-infundibular corollas. The fourth species, which is probably moth pollinated, has strongly fragrant, white, salverform corollas. All four species are native to South America. Pyrostegia venusta (Ker Gawl.) Miers, a popular ornamental, is cultivated throughout the tropics. Lectotypes are designated for Bignonia ignea Vell., B. tecomiflora Rusby, P. cinerea Bureau ex K. Schum., P. dichotoma Miers ex K. Schum., P. venusta var. villosa Hassl., and Tynanthus igneus Barb. Rodr. A key to the species, speci...