A new combination in Matelea is proposed: Matelea domingensis.

Brachylepis nervosa, Wight and Arnot, belongs to the family asclepiadaceae is indigenous to ills of the Nilgiris and distribution of which is restricted to Wellington and kothagiri. The present work summarises preliminary phytochemical characters of this plant.

Taxonomic limits of Gonolobus (Apocynaceae: Asclepiadoideae) in the southeastern United States have been controversial, with some authors recognizing two species and others only one. Over the past 30 years, most authors have tended toward recognition of a single species. However, the morphological variation within the taxon appears complicated and has not been analyzed using a quantitative appr...

Phaeostemma surinamensis Morillo & Krings, sp. nov., anew species of Apocynaceae (Asclepiadoideae, Gonolobinae) is described and illustrated, and the new combination Phaeostemma fucata (Woodson) Morillo & Krings, comb. nov., is made. The new species, known only from a lowland wet forest of Suriname, seems to be closely related to Phaeostemma fucata, which is an endemic to Ptari-tepui, a sandsto...

The comparative chromosomal features of four species belonging to family Apocynaceae from Northeastern Thailand were studied the root tips. somatic chromosome numbers all specimens found be 2n = 36 for Allamanda blanchetii, 18 A. cathartica, 20 in schottii and 52 Cryptostegia grandiflora. cathartica have same number previous except C. grandiflora differs previously reported. Moreover, has never...

The essential oil of the stems and fruits of Caralluma europaea (Guss.) N.E.Br. (Apocynaceae) from Lampedusa Island has been obtained by hydrodistillation and its composition analyzed. The analyses allowed the identification and quantification of 74 volatile compounds, of which 16 were aromatic and 58 non-aromatic. Stems and fruits contained 1.4% and 2.7% of aromatic compounds respectively, whi...

Two new species in the Matelea stenopetala complex (Apocynaceae, Asclepiadoideae) are described from the Guiana Shield and Amazonian Brazil: Matelea brevistipitata Krings & Morillo, sp. nov. and Matelea trichopedicellataKrings & Morillo, sp. nov. The new species belong to a small group of adaxially-pubescent-flowered taxa within the complex, including Matelea hildegardiana and Matelea pakaraime...

A synopsis of Gonolobus s.s. (Apocynaceae, Asclepiadoideae, Gonolobinae) in Trinidad and Tobago, including a key, descriptions, and illustrations, is provided to facilitate recognition and conservation of the two accepted species: Gonolobus rostratus and G. tobagensis. The misapplication of names both in the literature and to South American specimens is discussed.

Lumusidines A-D, bisindole alkaloids of the macroline-macroline type, and one of the macroline-pleiocarpamine type, villalstonidine F, were isolated from the stem-bark extract of Alstonia macrophylla (Apocynaceae). The structures and absolute configurations of these alkaloids were established using NMR, MS, and X-ray diffraction analyses.

A phytochemical study on the bark of Neisosperma oppositifolia (Apocynaceae) yielded two new beta-carboline indole alkaloids, oppositinines A (1) and B (2), together with five known alkaloids, isoreserpiline, isocarapanaubine, vobasine, 10-methoxydihydrocorynantheol-N-oxide, and ochropposinine oxindole. Structural elucidation of 1 and 2 was performed using 2D NMR methods. Oppositinines A (1) an...