Papers by Allan Bornstein
Much of western Sainte (Ste.) Genevieve County, Missouri, is underlain by parts of the LaMotte sa... more Much of western Sainte (Ste.) Genevieve County, Missouri, is underlain by parts of the LaMotte sandstone formation. The geological properties of this bedrock have led to the formation of canyons and cliffs, which harbor ''glacial relicts'' and other regionally rare, restricted plant species. A partial survey of the flora at Horton Farm Conservation Area (HFCA) in Ste. Genevieve County was performed from June 2012 to July 2014 to provide local conservation officials with relevant data to make informed management decisions. Four specific areas of interest were selected: a cliff complex near Rough Creek, a small acid seep, a glade/woodland complex, and the riparian corridor along Jonca Creek. A total of 214 vascular plant species was collected from HFCA: 23 from the acid seep area, 120 from Jonca Creek, 48 from the glade/woodland, and 77 from the cliff area. Included were 5 species of conservation concern, and 16 county records were documented. A checklist of the collected species is included, and a new combination is published-Aureolaria flava (L.) Farw. var. calycosa (Mack. & Bush) A.P. Braun.
Novon, 2007
In preparation for a detailed account of the genus Piper L. in Honduras, a nomenclator is provide... more In preparation for a detailed account of the genus Piper L. in Honduras, a nomenclator is provided that includes the name, reference citation, and type information for species accepted. A total of 45 taxa are currently recognized, with over 100 names (species level and below) listed in synonymy, 58 of which are new. Lectotypification is provided for the following taxa for which types were not designated at the time of publication: Piper cobanense Trelease, P. cyclophyllum Trelease, P. gracillimum Trelease, P. perinaequilongum Trelease, P. telanum Trelease, P. triumphale Trelease, P. wilsonii Trelease, and P. yzabalanum C. DC. var. pubinerve Trelease.
Novon: A Journal for Botanical Nomenclature, 2007
In preparation for a detailed account of the genus Piper L. in Honduras, a nomenclator is provide... more In preparation for a detailed account of the genus Piper L. in Honduras, a nomenclator is provided that includes the name, reference citation, and type information for species accepted. A total of 45 taxa are currently recognized, with over 100 names (species level and below) listed in synonymy, 58 of which are new. Lectotypification is provided for the following taxa for which types were not designated at the time of publication: Piper cobanense Trelease, P. cyclophyllum Trelease, P. gracillimum Trelease, P. perinaequilongum Trelease, P. telanum Trelease, P. triumphale Trelease, P. wilsonii Trelease, and P. yzabalanum C. DC. var. pubinerve Trelease.
Journal of the Arnold Arboretum., 1989
Qualitative and quantitative differentiation between Drosera linearis x rotundifolia and D. intermedia with special emphasis on floral characteristics
http://deepblue.lib.umich.edu/bitstream/2027.42/53205/1/1639.pdf
Systematic Botany
A systematic revision of the six nominal species of the Neotropical genus Manekia (Piperaceae) wa... more A systematic revision of the six nominal species of the Neotropical genus Manekia (Piperaceae) was completed after evaluation of morphological and molecular data. Phylogenetic analyses using four molecular markers [rpl32-trnL UAG spacer, psbj-petA intergenic intron regions 1 and 2, and internal transcribed spacer (ITS)] provided little resolution among species, perhaps indicating recent evolutionary divergence. Canonical discriminant analyses using morphological data recovered three separate groups, here recognized as distinct species: Manekia incurva, Manekia obtusa, and Manekia urbanii. Significant discriminating characteristics included petiole vagination, number of primary veins, leaf apex shape, leaf base shape, presence of pellucid dots, and bract ciliation.
(1223) Proposal to Conserve the Name Sarcorhachis against Manekia (Piperaceae)
Taxon, 1996
A Systematic Revision of the Genus <I>Manekia</I> (Piperaceae)
Systematic Botany, 2012
Systematic Botany, 2014
ABSTRACT Two new Antillean endemic species, Piper abajoense from Puerto Rico, and Piper claseanum... more ABSTRACT Two new Antillean endemic species, Piper abajoense from Puerto Rico, and Piper claseanum from the Dominican Republic, are described and illustrated. The former species resembles the widely distributed Piper hispidum, including the somewhat scabrous leaf surfaces, typically asymmetric leaf bases, and the bracts, flowers, and fruits forming distinct bands around the spike, but is distinguished by the combination of glabrous and stylose fruits (vs. densely puberulent and estylose), laterally (vs. apically) dehiscent anthers, and shorter spikes. The latter species resembles Piper samanense, another endemic species from the Dominican Republic, in vegetative morphology, including the leathery leaves with pellucid dots visible below when dry, but differs in its long-pedicellate flowers and fruits (vs. sessile or pseudo-pedicellate), puberulent rachis and pedicels (vs. densely white-pubescent), and puberulent vs. pubescent fruits. A phylogeny based on the nuclear ribosomal Internal Transcribed Spacer (ITS) and chloroplast intron psbJ-petA indicates proper placement of these two new species within clades Radula and Enckea, respectively. Two keys are provided, one to all species of Piper from Puerto Rico, the other to the palmate-veined species from the Dominican Republic. Resumen—Se describen e ilustran aquí dos especies nuevas de Piper endémicas a las Antillas, Piper abajoense de Puerto Rico y Piper claseanum de la Repú blica Dominicana. La primera especie es similar a la especie de amplia distribució n, P. hispidum, incluyendo las hojas algo híspidas, las bases asimétricas de las hojas, y las brácteas, flores, y frutos que forman bandas distintas alrededor de la espiga, pero se distingue por la combinación de los frutos glabros y con estilos (vs. densamente puberulentos y sin estilos), anteras con dehiscencia lateral (vs. apical), y espigas más cortas. La segunda especie se asemeja a P. samanense, otra especie endémica a la Repú blica Dominicana, en su morfología vegetativa, incluso las hojas correosas con puntos translú cidos visibles en el envés en hojas secas, pero se diferencia de esta por los frutos con los pedicelos largos (vs. sésiles o con pedicelos falsos), el raquis y pedicelo puberulentos (vs. densamente blanco pubescentes), y los frutos puberulentos (vs. pubescentes). Una filogenia, basada en el espaciador transcribible interno del ADN ribosó mico nuclear (ITS) y el intró n del cloroplasto psbJ-petA indica que las dos especies pertenecen a los clados Radula y Enckea respectivamente. Se proporcionan dos claves, una para todas las especies de Piper en Puerto Rico, y la otra para las especies de la Repú blica Dominicana con las hojas con venació n palmada.
Novon: A Journal for Botanical Nomenclature, 2006
Novon: A Journal for Botanical Nomenclature, 2007
In preparation for a detailed account of the genus Piper L. in Honduras, a nomenclator is provide... more In preparation for a detailed account of the genus Piper L. in Honduras, a nomenclator is provided that includes the name, reference citation, and type information for species accepted. A total of 45 taxa are currently recognized, with over 100 names (species level and below) listed in synonymy, 58 of which are new. Lectotypification is provided for the following taxa for which types were not designated at the time of publication: Piper cobanense Trelease, P. cyclophyllum Trelease, P. gracillimum Trelease, P. perinaequilongum Trelease, P. telanum Trelease, P. triumphale Trelease, P. wilsonii Trelease, and P. yzabalanum C. DC. var. pubinerve Trelease.
Castanea, 2012
Buford Mountain Conservation Area, located primarily in the northeastern corner of Iron County, M... more Buford Mountain Conservation Area, located primarily in the northeastern corner of Iron County, Missouri, on the border with Washington County, is both geologically and floristically unique. To help develop an area management plan, the Missouri Department of Conservation was interested in conducting a floristic survey of vascular plants on a designated igneous glade region. The purpose of this study was to provide a vouchered floristic inventory, and to document any occurrences of rare or endangered taxa. The floristic survey was conducted over parts of two growing seasons (from 7 August 2010 to 2 August 2011) during which specimens were collected on approximately weekly to biweekly intervals. A controlled burn that encompassed the entire study site was conducted by the Missouri Department of Conservation on 13 April 2011 in an attempt to discourage encroachment by Carya ovata (shagbark hickory) and Juniperus virginiana var. virginiana (red cedar). A total of 132 vascular plant taxa (including 15 taxa identified to the level of variety or subspecies) in 102 genera and 49 families were collected, including 3 ferns, 1 gymnosperm, 25 monocots, and 103 dicots. All of the taxa were native except for Setaria faberi (nodding foxtail). The most diverse family was the Asteraceae with 22 species, followed by the Fabaceae and Poaceae represented by 14 and 12 species, respectively. The most diverse genus was Panicum with six different species. Only one species of conservation concern was collected, Eupatorium semiserratum (a thoroughwort), which was abundant in the wooded areas surrounding the glades.
Matelea decipiens (Asclepiadaceae): A New County Record from Illinois
Castanea, 2013
Castanea, 2011
This study investigated several ecological parameters for populations of Obolaria virginica in so... more This study investigated several ecological parameters for populations of Obolaria virginica in southeast Missouri where it is listed as endangered. Investigations during the 2006 and 2007 growing seasons included population size estimates and dispersal patterns. A secondary investigation during the 2007 season quantitatively assessed the impact of leaf litter on O. virginica flower production. Obolaria virginica reflected the pattern of a spring ephemeral with emergence as early as mid-February and senescence by early June. Plants grew to an average of 9.2 cm in height and had 14 flowers per individual in each season. Population size estimates ranged from 833-7,820 individuals, with a distinctly clumped distribution pattern.
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Papers by Allan Bornstein