Mark Alan Hershkovitz is an American biochemist and taxonomist. The standard author abbreviation Hershk. is used to indicate this person as the author when citing a botanical name . [1]
In 1981 he received his Bachelor of Science from Illinois State University. He received his Master of Science and PhD degrees from University of California, Davis, in 1986 and 1990; [2] his focus in his doctoral program was botany. Afterwards, he worked for the Laboratory of Molecular Systematics at the Smithsonian Institution as a postdoctoral scientist, and c. 1996 he joined the National Center for Biotechnology Information as a fellow under the Postdoctoral Intramural Research Training Award. [3]
As of 2005 [update] he is a professor at the University of Chile. [2]
Phylogeny of Chaetanthera (Asteraceae: Mutisieae) reveals both ancient and recent origins of the high elevation lineages Molecular Phylogenetics and Evolution 41: 594-605.
Zygophyllaceae is a family of flowering plants that contains the bean-caper and caltrop. The family includes around 285 species in 22 genera.
The Urticaceae are a family, the nettle family, of flowering plants. The family name comes from the genus Urtica. The Urticaceae include a number of well-known and useful plants, including nettles in the genus Urtica, ramie, māmaki, and ajlai.
Equisetales is an order of subclass Equisetidae with only one living family, Equisetaceae, containing the genus Equisetum (horsetails).
Internal transcribed spacer (ITS) is the spacer DNA situated between the small-subunit ribosomal RNA (rRNA) and large-subunit rRNA genes in the chromosome or the corresponding transcribed region in the polycistronic rRNA precursor transcript.
Pteridaceae is a family of ferns in the order Polypodiales, including some 1150 known species in ca 45 genera, divided over five subfamilies. The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteridoid, and hemionitidoid ferns. Relationships among these groups remain unclear, and although some recent genetic analyses of the Pteridales suggest that neither the family Pteridaceae nor the major groups within it are all monophyletic, as yet these analyses are insufficiently comprehensive and robust to provide good support for a revision of the order at the family level.
Cistanthe is a plant genus which includes most plants known as pussypaws. These are small, succulent flowering plants which often bear brightly colored flowers, though they vary quite a bit between species in appearance. Some species have flowers that are tightly packed into fluffy-looking inflorescences, the trait that gives them their common name. Many are adapted to arid environments, with some able to withstand climates that almost completely lack rainfall. Cistanthe was a genus created to segregate several species previously classified in Calandrinia. Several species from other closely related genera have been moved into Cistanthe as well.
Rhodolirium is a small South American genus in the tribe Hippeastreae of the family Amaryllidaceae. Although originally described by Philippi in 1858 it has long remained buried in other taxa, principally Hippeastrum and more recently Rhodophiala. Only in recent years has it been rehabilitated.
Lewisiopsis tweedyi is a flowering plant and sole species in genus Lewisiopsis. The species, formerly known as Cistanthe tweedyi and Lewisia tweedyi, is now classified in the family Montiaceae. The plant is known by the common names Tweedy's pussypaws, Tweedy's lewisia, or Tweedy's bitterroot. It is endemic to western North America in north-central Washington and adjacent British Columbia. It commonly grows on well-drained slopes often on rocky slopes or in rock crevices from low elevation ponderosa pine sites up to the drier part of the Grand Fir zone of the North Cascades. The flowers usually have a coral, apricot, or pink color.
Lilioid monocots is an informal name used for a grade of five monocot orders in which the majority of species have flowers with relatively large, coloured tepals. This characteristic is similar to that found in lilies ("lily-like"). Petaloid monocots refers to the flowers having tepals which all resemble petals (petaloid). The taxonomic terms Lilianae or Liliiflorae have also been applied to this assemblage at various times. From the early nineteenth century many of the species in this group of plants were put into a very broadly defined family, Liliaceae sensu lato or s.l.. These classification systems are still found in many books and other sources. Within the monocots the Liliaceae s.l. were distinguished from the Glumaceae.
Alan W. Meerow is an American botanist, born in New York City in 1952. He specializes in the taxonomy of the family Amaryllidaceae and the horticulture of palms and tropical ornamental plants. He also works on the population genetics and molecular systematics of cycads and palms.
Ophioglossidae is one of the four subclasses of Polypodiopsida (ferns). This subclass consists of the ferns commonly known as whisk ferns, grape ferns, adder's-tongues and moonworts. It is equivalent to the class Psilotopsida in previous treatments, including Smith et al. (2006). The subclass contains two orders, Psilotales and Ophioglossales, whose relationship was only confirmed by molecular phylogenetic studies.
Leslie D. Gottlieb (1936–2012) was a US biologist described by the Botanical Society of America as "one of the most influential plant evolutionary biologists over the past several decades.". He was employed at the University of California, Davis for 34 years, and published widely. In addition to his primary work in plant genetics, Gottlieb was an advocate for rare and endangered plant conservation.
Amaryllidoideae is a subfamily of monocot flowering plants in the family Amaryllidaceae, order Asparagales. The most recent APG classification, APG III, takes a broad view of the Amaryllidaceae, which then has three subfamilies, one of which is Amaryllidoideae, and the others are Allioideae and Agapanthoideae. The subfamily consists of about seventy genera, with over eight hundred species, and a worldwide distribution.
Traubiinae is a subtribe of plants classified under the tribe Hippeastreae. It belongs to the subfamily Amaryllidoideae of the Amaryllis family (Amaryllidaceae).
Clinantheae is a tribe, where it forms part of the Andean clade, one of two American clades. The tribe was described in 2000 by Alan Meerow et al. as a result of a molecular phylogenetic study of the American Amaryllidoideae. This demonstrated that the tribe Stenomesseae, including the type genus Stenomesson was polyphyletic. Part of the tribe segregated with the Eucharideae and were submerged into it, while the other part formed a unique subclade. Since the type species of Stenomesson was not part of the second sublclade it was necessary to form a new name for the remaining species together with the other genera that remained. This was Clinanthus, the oldest name for these species, and consequently the tribe Clinantheae.
Jeffrey Donald Palmer is a Distinguished Professor of Biology at Indiana University Bloomington.
Birgitta Bremer, Swedish botanist and academic, is professor at Stockholm University, and director of the Bergius Botanic Garden.
Roger Charles Carolin is a botanist, pteridologist and formerly an associate professor at Sydney University. He was appointed as a lecturer in botany at the University of Sydney in 1955 earned a Ph.D from Sydney University in 1962 with a thesis on the floral morphology of the campanales, and retired as an associate professor in 1989.
David Stoughton Conant was an American botanist, specializing in the systematics and genetics of tropical tree ferns.
Barbara Ann Whitlock is a botanist, who earned a PhD from Harvard University, with a dissertation entitled Systematics and evolution of chocolate and its relatives c. 2000, an interest which continues.
 | Wikispecies has information related to Hershk. . |
