Journal•ISSN: 0265-086X
Bradleya
BioOne (British Cactus and Succulent Society)
About: Bradleya is an academic journal published by BioOne (British Cactus and Succulent Society). The journal publishes majorly in the area(s): Genus & Biology. It has an ISSN identifier of 0265-086X. Over the lifetime, 557 publications have been published receiving 2925 citations.
Topics: Genus, Biology, Crassulaceae, Subspecies, Agave
Papers published on a yearly basis
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TL;DR: Stem succulence and the “cactus life form” are used to illustrate the parallel evolution of functional adaptations in morphology, and to contrast the obvious external similarities with the widely variable internal architecture.
Abstract: Succulence is an adaptive strategy that allows plants to remain active during seasonal water shortage. The term was first used formally by Johann (Jean) Bauhin in 1619 to refer to plants with thick, juicy leaves. Its subsequent use and selected definitions are critically discussed, including concepts such as utilizable water, caudiciforms and pachycauls, and root succulence. A unified definition of succulence considers aspects of morphology and anatomy, ecology, and physiology. Stem succulence and the “cactus life form” are used to illustrate the parallel evolution of functional adaptations in morphology, and to contrast the obvious external similarities with the widely variable internal architecture, including the participation of different stem tissues in water storage.
93 citations
TL;DR: An account precursory to a monographic treatment of Cactaceae tribe Rhipsalideae De Candolle is presented covering the genera Lepismium Pfeiffer, Rhipsalis Gaertner, Hatiora Britton & Rose and Schlumbergera Lemaire.
Abstract: An account precursory to a monographic treatment of Cactaceae tribe Rhipsalideae De Candolle is presented covering the genera Lepismium Pfeiffer (6 subgenera: 14 spp.), Rhipsalis Gaertner (5 subgenera: 33 spp.), Hatiora Britton & Rose (2 subgenera: 5 spp.) and Schlumbergera Lemaire (6 spp.). Keys to enable identification of subgenera and species are provided for each genus. For Rhipsalis, 3 species and 2 subspecies are named for the first time and throughout the tribe various new name combinations are validated at the ranks of subgenus, subspecies and forma. Bibliographic and typification data are provided for all accepted names and their basionyms, and a summary of geographical distribution and ecology, where known, is given for each species and/or subspecies recognized. Names of uncertain application are discussed and an index to all commonly encountered binomial synonyms is provided.
75 citations
TL;DR: The IOS Working Party as mentioned in this paper revised its 1986 consensus list of accepted genera and proposed a new list of 93, i.e. seven more than the one of 1986.
Abstract: Summary. After further debate and a postal ballot of specialists, the IOS Working Party has revised its 1986 ‘consensus’ list of accepted genera. The new list totals 93, i.e. seven more than that of 1986. The synopsis of genera is accompanied by a comprehensive index of generic names, an explanation of the ballot procedure and edited commentary on the proposals ballotted, summaries of recently published tribal classifications, and relevant bibliography.
75 citations
TL;DR: Changes detected in the chloroplast DNA involving structural rearrangements, restriction site variation, and gene sequence variation have provided phylogenetically informative data, useful in the construction of cladograms which infer evolutionary relatedness among the various cactus groups investigated.
Abstract: Studies of molecular variation within the chloroplast genome have been used to determine phylogenetic relationships within the evolutionarily complex family Cactaceae. Changes detected in the chloroplast DNA (cpDNA) involving structural rearrangements (inversions, deletions, etc.), restriction site variation, and gene sequence variation have provided phylogenetically informative data, useful in the construction of cladograms which infer evolutionary relatedness among the various cactus groups investigated. Examples are provided from studies of representative cacti for each of these types of detected cpDNA variation. Applicability of these methods to resolving fundamental questions in cactus evolution and systematics are also discussed.
72 citations
TL;DR: A comprehensive survey of seed-morphology is presented together with keys to species and infraspecific taxa, descriptions, ecological data, distribution maps, cladograms, colour and halftone illustrations, a list of new names and an index to specific epithets.
Abstract: Summary. Melocactus Link & Otto (31 spp.) is revised in Central and South America to include 24 species and 10 heterotypic subspecies, arranged in 6 species-groups primarily on the basis of fruit, seed and spination characters: M. oreas Group incl. M. oreas (2 subspp.), M. ernestii (2 subspp.), M. bahiensis (2 subspp.), M. conoideus; M. deinacanthus Group (1 sp.); M. levitestatus Group (1 sp.); M. azureus Group incl. M. azureus (2 subspp.), M. pachyacanthus (2 subspp.); M. violaceus Group incl. M. salvadorensis, M. zehntneri, M. lanssensianus, M. glaucescens, M. concinnus, M. paucispinus, M. violaceus (3 subspp.), M. neryi, M. smithii; M. curvtspinus Group incl. M. estevesii, M. mazelianus, M. schatzlii, M. andinus (sp. nov.), M. bellavistensis (2 subspp.), M. peruvianus and M. curvispinus (3 subspp.). There are 18 species in eastern and Amazonian Brazil (16 endemic), 3 in the region of the Guianas and Venezuelan/Colombian llanos, and 4 endemic to the central and northern Andes. Only one, polymorphic spec...
70 citations