Britton, Nathaniel Lord & Rose, Joseph Nelson (1919). The Cactaceae: descriptions and illustrations of plants of the cactus family (Vol. 1). Washington, D.C: Carnegie Institution of Washington.
Major new work on the Cactaceae, published under the auspices of the International Cactaceae Systematics Group (ICSG). An essential purchase for cactaceae specialists and botanical libraries.From the publisher's announcement:Planned as a successor to Backeberg's Cactus Lexicon, The New Cactus Lexicon will be the most scientifically authoritative conspectus of the Cactaceae published for nearly a century. It will be comprehensively illustrated in colour and is confidently expected to become the benchmark reference for all those with amateur or professional interests in the diversity, identification and conservation of cacti.It will provide a concise compendium of information on cactus genera, species and subspecies accepted in the standard literature on cacti since Britton & Rose's famous monograph (1919-23), with references to places of publication, principal synonyms, geographical distribution, diagnostic features and brief commentary;More than 2200 colour illustrations in a companion 'Atlas' (not available separately), mostly of plants in habitat or from documented plants in cultivation, covering nearly all currently recognized species and subspecies.Preparation is being undertaken on behalf of the International Cactaceae Systematics Group (ICSG), an informal group founded in Zurich in 2000 to supersede the former Cactaceae Working Party of the International Organization for Succulent Plant Study (IOS).Honorary editors: David Hunt, Nigel Taylor and Graham Charles, supported by a team of more than 100 contributors of illustrations, text and comments.
The New Cactus Lexicon. Pdf
Ferocactus acanthodes it will be: Found the small little write-up in Cactus Explorers: (6, web page 25) A offer to reject the name Echinocactus( Ferocactus) acanthodes posted in 2011 offers now ended up voted upon and will be not suggested by 16 ballots to 1 with 2 abstentions.
Ten studies investigating eight cactus species red-listed by IUCN and eight studies investigating 11 plant species from campos rupestres were selected from our surveys on the Web of Science (2017 Dec 4, data not shown) for genetic diversity comparisons (Table 2). Most of the red-listed cactus species are microendemics from central Mexico, and two species also occur in the campos rupestres from eastern Brazil. Overall, we found high genetic diversity reported for those species, with mean values of HE and A ranging from 0.465 and 3.8 in P. parvus [22] to 0.765 and 8.8 in Mammillaria crucigera [44]. Among the selected campo rupestre plants, there are six cactus species, of which five belong to the genus Pilosocereus. The remaining plants include one species of each family Euriocaulaceae, Melastomataceae, Orchidaceae, Polygonaceae, and Velloziaceae. Genetic diversity in this group was moderate to high, with mean values of HE and A ranging from 0.324 to 0.753 and from 2.7 to 9.7, respectively. The Wilcoxon tests indicated that the number of alleles and the expected heterozygosity in P. aureispinus were significantly smaller than those reported for five of the eight surveyed cactus species, including the campo rupestre species Uebelmannia pectinifera. Comparing with other campo rupestre plant species, genetic diversity estimates for P. aureipsinus were not significantly different from eight of the 11 surveyed species, including five Pilosocereus species, being only smaller than those reported for two species of the families Eriocaulaceae and Velloziaceae.
In contrast to microsatellite variation found in P. aureispinus, plastid markers (trnT-trnL and psbD-trnT) did not show any variation. Besides recent selective sweep, a possible explanation to the lack of variation on the plastid markers could be a recent bottleneck of P. aureispinus. However, the moderate variation in nuclear markers and the absence of significant excess of heterozygotes prevent this later possibility. An alternative explanation could be a long-term effect of genetic drift eroding variation mostly in plastid genome, as cytoplasmic genomes in general presents fourfold smaller effective population size than nuclear genomes. Although previous studies have found intraspecific variation on cactus species in the plastid markers used in this study [46], including Pilosocereus species [18], lineage-specific variation in cpDNA has been reported in Cactaceae, even among closely related species [47]. These findings suggest that other plastid regions of P. aureispinus could exhibit some level of variation.
Pilosocereus aureispinus only occurs in patches of rocky outcrops in a rugged topographic region, which may restrict connectivity in this species. Even with this patchy distribution, all analyses (except BARRIER) found no clear population genetic structure in our data. The results obtained after excluding the potentially biased loci (Pmac135 and Pmac146 loci) indicated low genetic differentiation among populations, suggesting high level of recent gene flow according to the lower FST and G"ST and small number of low-frequency private alleles. Further, STRUCTURE, DAPC, and AMOVA results suggested that P. aureispinus is composed of a single population group. In contrast, BARRIER was able to infer barriers to gene flow isolating each sampling site. Because overall and pairwise FST were low and taking into account the previous results of our population structure analyses, we conclude that BARRIER has identified a subtle, more sensible restriction to gene flow among populations. Further the analysis implemented in GENECLASS2 detected four possible migrants in 91 individuals (Table 3), indicating that seed and/or pollen movement among all the localities may eventually occur. Although very little is known about the reproductive biology of P. aureispinus, its floral characteristics such as nocturnal anthesis, short perianth-segments, and robust flowers resistant to the impact caused by visitors, suggest bats as its primary pollinator. Bat-mediated gene dispersal has been associated as an important factor contributing to low population structure and high genetic diversity in other cactus species (e.g. [48] and references therein). Although cactus species generally have flowers phenotypically specialized to certain pollination types [49], the systems closely studied so far actually work as generalists [50]. Contrary to the species floral guilds of pollination, if P. aureispinus is generalist then the K = 1 structuring is likely maintained by efficient seed and/or pollen dispersal vectors. Besides the effectiveness of seed and/or pollen movement connecting the cactus patches, an alternative (and no exclusive) explanation to the lack of marked genetic structuring in P. aureispinus are the past events of expansion during glacial times that Pilosocereus species have experienced [15], which could have increased the connectivity among the cactus patches.
En esta página publico todos los libros sobre cactus en inglés que conseguí, con mis apreciaciones personales sobre los mismos y la utilidad que les he dado para el que esté interesado en comprarlos también. Son libros generales, que abarcan todos o la mayoría de los géneros, empecé comprando estos libros, hasta que llegué a un punto en que no obtenía información nueva, y continué buscando las monografías sobre cada género.
Es una de las mejores referencias (y la más actual), aunque en la edición 2013 redujeron el tamaño para ahorrar costos de impresión, la calidad es muy buena y tiene excelentes fotografías (alrededor de 1.500). La información es mínima, más allá de que figuran los nombres de las especies, país y localidad de origen y altitud sobre el nivel del mar; pero es una gran ayuda en la identificación, especialmente en aquellas especies que tienen muchos sinónimos. El editor es David Hunt, quien compiló todo el trabajo de varios autores que integran el International Cactaceae Systematics Group. Es uno de los libros más interesantes sobre cactus, quizá este año esté la actualización del libro de texto. El sitio web del libro es www.newcactuslexicon.org
Es básicamente un libro de fotografías, con una técnica y calidad fantásticas, ya que que el autor es fotógrafo profesional. Abarca las flores de los cactus que habitan en el desierto de Sonora, con algunos breves ensayos de varios autores relacionados con el tema. La mayoría de las fotografías son a página completa, con fondo negro y gran nivel de detalle. La calidad de impresión es excelente. En definitiva, no tiene mucha información, dado que es un libro para disfrutarlo visualmente y realmente vale la pena.
Es un libro de pequeño formato, con excelente calidad de impresión. Tiene muy buenas fotos a página completa. El libro une, en un ida y vuelta, la experiencia de la autora con datos más objetivos sobre el cuidado de distintas especies de cactus, en un relato interesante, que invita a leerlo. La autora describe apasionadamente el cultivo de cactus en su jardín. La información sobre el cultivo es buena, pero muy reducida y limitada a pocas especies. Finaliza con una leyenda folklórica sobre un cactus de flores nocturnas de la zona de Arizona, USA.
Es un libro de pequeño formato, con un excelente diseño, muy atractivo visualmente y de buena calidad de impresión. Como su nombre indica, describe 500 especies de cactus, pero se enfoca en aquellas más accesibles a los coleccionistas o las que son más representativas de algunos géneros. Por esta razón es muy útil, ya que no suelen encontrarse esos cactus de tamaños imposibles para un invernadero común. La descripción de forma, espinación y flores son muy concisas, y se destina mayor espacio a la fotografía (casi todas con flor) e información sobre cultivo en algunos casos o similitudes y diferencias con otras especies. El primer capítulo dedica unas 10 páginas al cultivo en general. 2ff7e9595c
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