Systematic Botany Monographs is a series published on an irregular basis of taxonomic revisions and monographs focused on a particular plant group with emphases on species delimitations and accompanying nomenclature, as well as information about morphology, distribution, and phylogeny. Click below to order any available volume using the mail-in PDF, or click on the images to see the flyers or order the recent volumes.



Lastest volumes...

Solanum subg. Leptostemonum...(PDF order form)

Solanum subg. Leptostemonum...(PDF order form)

Solanum in South America...(PDF order form)

Solanum in South America...(PDF order form)

Asian Pertya... (click for PDF order form)

Asian Pertya... (click for PDF order form)

Volume 99

A Revision of the "Spiny Solanums," Solanum subgenus Leptostemonum (Solanaceae), in Africa and Madagascar

Maria S. Vorontsova and Sandra Knapp

432 pp.

November 2016

ISBN 978-1-943751-00-6

Abstract: Solanum subgenus Leptostemonum (Solanaceae) in continental Africa and Madagascar contains 76 native and 10 introduced species; the native species form part of a monophyletic clade of Old World spiny solanums, while the introduced taxa are from the New World and are members of other spiny Solanum clades. Subgenus Leptostemonum (the spiny solanums) is characterized by the possession of stellate trichomes, long tapering anthers with distally directed pores, and the usual presence of epidermal prickles. African members of subgenus Leptostemonum have long been perceived as difficult due to great morphological variability and lack of modern collections. The treatment is based on the examination of over 10,000 herbarium specimens and on field work in the center of species diversity in the group. All species from the region are included in this treatment to assist with identification. The center of both richness and endemism of native species is in East Africa (with 33 endemic species, focused on Kenya and Tanzania); secondary centers of diversity occur in South Africa (12 endemic species) and Madagascar (10 endemic species). The introduced species are generally widespread and are often invasive weeds, but some are cultivated for ornament. Both a dichotomous key and a synoptic character list are presented to aid with identification of these highly variable species. Full descriptions and synonymies (including designation of lecto- and neotypes), illustrations, distribution maps, and discussion concerning similar and potentially related taxa are provided for all accepted species.

© The American Society of Plant Taxonomists



Taxonomy of Wild Potatoes and Their Relatives in Southern South America (Solanum sects. Petota and Etuberosum)

David M. Spooner, Natalia Alvarez, Iris E. Peralta, and Andrea M. Clausen

240 pp.

December 2016

ISBN 978-0-912861-99-9

Abstract: Solanum L. section Petota Dumort., which includes the cultivated potato (S. tuberosum L.) and its wild relatives, is distributed from the southwestern United States to central Argentina, Uruguay, and adjacent Chile. Section Etuberosum (Buk. & Kameraz) A. Child, a closely related group, is distributed in Argentina and Chile. This taxonomic treatment includes all wild species of these two sections from southern South America to include all areas of the countries of Argentina, Bolivia, Brazil, Chile, Paraguay, and Uruguay. Section Etuberosum is entirely diploid (2n = 24), whereas sect. Petota includes diploids (2n = 24), triploids (2n = 36), tetraploids (2n = 48), and hexaploids (2n = 72). We here recognize three species from sect. Etuberosum and 27 species from sect. Petota from this region, and divide the latter into six informal species groups. Relative to the most recent comprehensive treatment of these species by Hawkes in 1990, we place in synonymy names of 36 species, seven subspecies, and one variety, and raise one subspecies to species rank; our treatment, therefore, recognizes only 40% of the taxa from Hawkes’s 1990 treatment. We identified major range expansions for S. acaule Bitter and S. medians Bitter in Chile, and S. morelliforme Bitter & Münch in Bolivia. We present a summary of recent morphological and molecular studies of species limits and species interrelationships, and provide descriptions, synonymies (including designations of lectotypes), illustrations, locality data, and distribution maps for all species.

© The American Society of Plant Taxonomists



Revision of the Asian Genus Pertya (Asteraceae, Pertyoideae)

Susana E. Freire

90 pp.

January 2017

ISBN 978-1-943751-01-3

Abstract: Pertya Sch. Bip. (Asteraceae: Pertyoideae: Pertyeae) is an Asiatic genus, ranging fromAfghanistan to Japan. Pertya comprises 22 species of small shrubs: 16 species are endemic to China, one to Japan, one to China and Japan, one to Thailand, one to Taiwan, one to Afghanistan, and one to Afghanistan and Pakistan. It is characterized by having macroblasts and brachyblasts bearing alternate and congested leaves, respectively. Pertya yakushimensis is synonymized with P. glabrescens. One new combination is proposed: Pertya dioica (Bunge) S. E. Freire. Three series previously recognized are raised to sectional rank: Pertya sect. Pertya, P. sect. Phylicoides, and P. sect. Sinensis. Pertya sect. Eupertya ser. Paniculatae is newly synonymized with Pertya sect. Phylicoides. The cladistic relationships of the genus, based on analysis of 36 morphological characters, were investigated. Catamixis, Ainsliaea, Macroclinidium, and Myripnois, the genera closest to Pertya, were included as part of the in-group, and Oldenburgia, from South Africa, was used as the out-group for phylogenetic analysis. Pertya is distinguished from Ainsliaea by its barbellate pappus setae (vs. plumose in Ainsliaea), and from Macroclinidium and Catamixis principally by its heterothalamic habit (vs. homothalamic in Macroclinidium and Catamixis). The phylogenetic analysis resulted in seven most parsimonious trees (MPTs), each of 111 steps. The genus Pertya, as currently recognized, is shown to be paraphyletic. However, if the monotypic genus Myripnois is included, Pertya is monophyletic. Cladistic analysis supports the reduction of the genus Myripnois into the synonymy of Pertya. The cladistic relationships within Pertya are consistent with the three sections proposed here: Pertya, Phylicoides, and Sinensis. A key to the species of the genus is provided, as well as morphological descriptions, illustrations, and distribution maps.

© The American Society of Plant Taxonomists



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