Works in North America
Published research works with metadata for North America (Continent).
1165 works
Showing 1051 to 1100 of 1165 works
The effect of insect herbivory on the growth and fitness of introduced Verbascum thapsus L
A majority of the plant species that are introduced into new ranges either do not become established, or become naturalized yet do not attain high densities and are thus considere…
Stomach contents from invasive American bullfrogs Rana catesbeiana (= Lithobates catesbeianus) on southern Vancouver Is…
Invasive alien American bullfrog populations are commonly identified as a pernicious influence on the survival of native species due to their adaptability, proliferation and conse…
The exotic invasive plant Vincetoxicum rossicum is a strong competitor even outside its current realized climatic tempe…
Dog-strangling vine (Vincetoxicum rossicum) is an exotic plant originating from Central and Eastern Europe that is becoming increasingly invasive in southern Ontario, Canada. Once…
Monograph of Diplachne (Poaceae, Chloridoideae, Cynodonteae)
Diplachne P. Beauv. comprises two species with C4 (NAD-ME) photosynthesis. Diplachne fusca has a nearly pantropical-pantemperate distribution with four subspecies: D. fusca subsp.…
Taxonomic revision of Pachyptera (Bignonieae, Bignoniaceae)
Pachyptera DC. is a small genus of neotropical lianas included in tribe Bignonieae (Bignoniaceae). The genus has a complicated taxonomic history but currently includes species dis…
Ex uno, multis: taxonomic revision in Navarretia divaricata (Polemoniaceae) and the recognition of four additional cryp…
Navarretia divaricata, endemic to western North America and most recently considered a single species with two subspecies, was re-examined in light of field work, DNA sequences, c…
Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of …
The Lerma-Chapala Basin, in Central Mexico, is geologically heterogeneous, climatically diverse and boasts high biodiversity, lying within two Biodiversity Hotspots, namely Mesoam…
Two new endemic tree species from Puerto Rico: Pisonia horneae and Pisonia roqueae (Nyctaginaceae)
In this paper, we describe two endemic tree species of Pisonia (Caryophyllales: Nyctaginaceae) from Puerto Rico that were erroneously catalogued under the single name Pisonia subc…
Two new species of Sabulina (Caryophyllaceae) from Washington State, U.S.A.
Sabulina basaltica and Sabulina sororia (Caryophyllaceae) are described as new species endemic to Washington State, U.S.A. Sabulina basaltica is restricted to high-elevation, basa…
A new species of Cinnamomum (Lauraceae) from the Bladen Nature Reserve, southern Belize
A new species in the Lauraceae, Cinnamomum bladenense S.W. Brewer & G.L. Stott, is described from the Bladen Nature Reserve in southern Belize. The new species is similar to Cinna…
A new species of Heliconia (Heliconiaceae) with pendent inflorescence, from Chucantí Private Nature Reserve, eastern Pa…
Heliconia berguidoi (Heliconiaceae), a new species from premontane forest of eastern Panama, is described, illustrated and its conservation status evaluated. H. berguidoi bears pi…
Two new species and a new combination in Protium (Burseraceae) from Costa Rica
Two new species of Protium (Burseraceae) are described and illustrated: Protium aguilarii sp. nov., from the Pacific slope of the Osa Peninsula, Puntarenas Province, Costa Rica; a…
Eutrema salsugineum (Cruciferae) new to Mexico: a surprising generic record for the flora of Middle America
The paper reports Eutrema salsugineum as a novelty to the flora of Mexico and Middle America in general. The finding stands ca. 1600 km apart from the closest known locality in th…
Spathelia belizensis, a new species and first record for the genus in Central America (tribe Spathelieae, Rutaceae)
Spathelia L. as currently circumscribed is endemic to the western portion of the West Indies, and contains nine species, one endemic to the Bahamas, three endemic to Jamaica and f…
Taxonomic and floristic novelties for Echeveria (Crassulaceae) in Central Michoacan, Mexico
A new species, Echeveria coruana, is described and illustrated from the malpaís near San Andrés Corú, Michoacan, Mexico. The species belongs to series Gibbiflorae and the new taxo…
Phylogenetic analyses and morphological characteristics support the description of a second species of Tridimeris (Anno…
Based on phylogenetic and morphological evidence, Tridimeris chiapensis Escobar-Castellanos & Ortiz-Rodr., sp. n. (Annonaceae), a new species from the karst forest of southern Mex…
Isoetes mississippiensis: A new quillwort from Mississippi, USA
Isoetes mississippiensis S.W. Leonard, W.C. Taylor, L.J. Musselman and R.D. Bray (Isoetaceae, Lycopodiophyta) is a new species known from two sites along tributaries of the Pearl …
Revision of the Lima clade (Miconia sect. Lima, Miconieae, Melastomataceae) of the Greater Antilles
Miconia sect. Lima is an entirely Greater Antillean clade that consists of 19 known species of shrubs and small trees, which were previously recognized under the polyphyletic gene…
A new generic system for the pantropical Caesalpinia group (Leguminosae)
The Caesalpinia group is a large pantropical clade of ca. 205 species in subfamily Caesalpinioideae (Leguminosae) in which generic delimitation has been in a state of considerable…
Molecular and morphological evidence for recognition of two species within Harpagonella (Amsinckiinae, Boraginaceae)
Recent taxonomic treatments of the genus Harpagonella have included only one lower taxon, H. palmeri A. Gray. However, a larger-fruited variety of H. palmeri from Arizona and Sono…
A Monograph of Conostegia (Melastomataceae, Miconieae)
A recent molecular phylogenetic analysis identified a clade containing all species of Conostegia, but that also included species of Clidemia and Miconia nested inside. A taxonomic…
A new species of Amphitecna (Bignoniaceae) endemic to Chiapas, Mexico
Amphitecna loreae Ortiz-Rodr. & Burelo, sp. nov. (Bignoniaceae), a new species endemic to the karst rainforest in southern Mexico, is described and illustrated. The new species di…
The Andean Paepalanthus pilosus complex (Eriocaulaceae): a revision with three new taxa
A herbarium-based revision is provided for Paepalanthus pilosus and allies, five commonly confused species of cushion plants native to Andean paramo. These are placed in the recir…
Molecular and morphological evidence for Penstemon luculentus (Plantaginaceae): a replacement name for Penstemon fremon…
Penstemon luculentus R.L.Johnson & M.R.Stevens, nom. nov. replaces Penstemon fremontii var. glabrescens Dorn & Lichvar. The varietal name glabrescens was not elevated because it w…
Lachemilla mexiquense (Rosaceae), a new species from Mexico
A new species of Lachemilla (Rosaceae), Lachemilla mexiquense D.F. Morales-B., from Mexico is described and illustrated. This species is similar to Lachemilla aphanoides by its tr…
Encyclia inopinata (Orchidaceae, Laeliinae) a new species from Mexico
A new species of Encyclia from Mexico, E. inopinata, is described and illustrated. This species is similar to E. diota but it can be distinguished by its usually more robust plant…
Novelties in Selaginella (Selaginellaceae – Lycopodiophyta), with emphasis on Brazilian species
In this paper, I describe five new species of Selaginella from Brazil (S. nanuzae, S. neospringiana, S. pellucidopunctata, S. stomatoloma, and S. trygonoides), compare them to mor…
Problematic specimens turn out to be two undescribed species of Bignonia (Bignoniaceae)
Bignonia comprises 29 species of lianas characterized by eight phloem wedges, leaves usually 2-foliolate, mostly simple tendrils and opaque seed wings. The analysis of herbarium s…
A revision of Spondias L. (Anacardiaceae) in the Neotropics
As part of an ongoing study of Anacardiaceae subfamily Spondioideae, the ten native and one introduced species of Spondias in the Neotropics are revised. The genus is circumscribe…
Adiantum shastense, a new species of maidenhair fern from California
A new species of Adiantum is described from California. This species is endemic to northern California and is currently known only from Shasta County. We describe its discovery af…
Four new species of Pyropia (Bangiales, Rhodophyta) from the west coast of North America: the Pyropia lanceolata specie…
Recent molecular studies indicate that the Pyropia lanceolata species complex on the west coast of North America is more speciose than previously thought. Based on extensive rbcL …
New vascular plant records for the Canadian Arctic Archipelago
The Canadian Arctic Archipelago is a vast region of approximately 1,420,000 km2, with a flora characterized by low species diversity, low endemicity, and little influence by alien…
A revision of Passiflora L. subgenus Decaloba (DC.) Rchb. supersection Cieca (Medik.) J. M. MacDougal & Feuillet (Passi…
Passiflora subgenus Decaloba supersection Cieca is a monophyletic group of herbaceous to woody climbers found in subtropical and tropical regions of the world. The 19 species reco…
Crataegus ×ninae-celottiae and C. ×cogswellii (Rosaceae, Maleae), two spontaneously formed intersectional nothospecies
Crataegus monogyna Jacq. is naturalized in North America, where it has hybridized with native diploid hawthorns at least twice. We provide names for the two nothospecies (as well …
Two new desert Eschscholzia (Papaveraceae) from southwestern North America
Two new species of Eschscholzia are described. Both are found in the deserts of California and one extends outside the state boundary into Arizona. Eschscholzia androuxii Still, s…
Lucky morning glory, Calystegia felix (Convolvulaceae): a new species from Southern California, with notes on the histo…
A new morning glory, Calystegia felix Provance & A.C. Sanders sp. nov. (Convolvulaceae), is described from the Los Angeles, San Gabriel, and Santa Ana River basins. Historical col…
A synopsis of the New World species of Drypetes section Drypetes (Putranjivaceae) with asymmetrical fruits, including d…
A synopsis of the New World species of Drypetes (Putranjivaceae) with asymmetrical drupes is presented. The group consists of three species: D. alba, with two varieties, from the …
Guzmania panamensis (Bromeliaceae) – a new species from Talamanca Mountain in Veraguas province, Western Panama
Guzmania panamensis (Bromeliaceae), a new species so far endemic to Veraguas province, Western Panama, is described and illustrated. The new species is recognized due to its pedun…
A revised circumscription for the Blakeeae (Melastomataceae) with associated nomenclatural adjustments
Systematic investigations and phylogenetic analyses of the Blakeeae (Melastomataceae) have indicated that Topobea should be synonymized under Blakea, and Huilaea under Chalybea. P…
Melothria domingensis (Cucurbitaceae), an endangered Caribbean endemic, is a Cayaponia
The Neotropical genus Melothria (Benincaseae, Cucurbitaceae) is a small group of yellow- or white-flowered climbers with small to medium-sized fruits. In 1899, Alfred Cogniaux des…
Revision of Poa L. (Poaceae, Pooideae, Poeae, Poinae) in Mexico: new records, re-evaluation of P. ruprechtii, and two n…
A revision and key to the 23 species and eight subspecies of Poa (including Dissanthelium) known to occur in Mexico is provided. All voucher specimens seen are cited for accepted …
Taxonomic synopsis of invasive and native Spartina (Poaceae, Chloridoideae) in the Pacific Northwest (British Columbia,…
Five species of the grass genus Spartina are invading salt marshes along the Pacific coast of North America, of which three have been documented in British Columbia, Canada, in on…
Eight new species of Cestrum (Solanaceae) from Mesoamerica
As part of the preparation of a taxonomic revision of Cestrum (Solanaceae) for Flora Mesoamericana eight hitherto undescribed species from Mexico, Guatemala, Costa Rica and Panama…
A revision of the spider genus Selenops (Arachnida, Araneae, Selenopidae) in North America, Central America and the Car…
The spider genus Selenops Latreille occurs in both the Old World and New World tropics and subtropics and contains nearly half of the species in the family Selenopidae Simon. In…
Two new species of Pterostichus Bonelli subgenus Pseudoferonina Ball (Coleoptera, Carabidae, Pterostichini) from the mo…
Two new species of Pterostichus Bonelli subgenus Pseudoferonina Ball, are described from the mountains of central Idaho: Pterostichus bousqueti Bergdahl [type locality = small tri…
Systematics and biology of the new genus Macrosaccus with descriptions of two new species (Lepidoptera, Gracillariidae)
The new genus Macrosaccus Davis & De Prins is proposed for three species formerly assigned to the genus Phyllonorycter: M. robiniella (Clemens), M. morrisella (Fitch), and M. uhle…
Biology and systematics of the New World Phyllocnistis Zeller leafminers of the avocado genus Persea (Lepidoptera, Grac…
Four New World species of Phyllocnistis Zeller are described from serpentine mines in Persea (Family Lauraceae). Phyllocnistis hyperpersea, new species, mines the upper leaf surfa…
Mites of the genus Neharpyrhynchus Fain (Acariformes, Harpirhynchidae) from Neotropical birds
Three new species of parasitic mites of the genus Neharpyrhynchus Fain (Acariformes, Harpirhynchidae) are described from Neotropical birds, N. chlorospingus sp. n. from Chlorospin…
New records of Caribbomerus from Hispaniola with redescription of C. elongatus (Fisher) and a key to the genus in the W…
Three species of Caribbomerus Vitali are newly recorded for the Dominican Republic: C. decoratus (Zayas), C. elongatus (Fisher), and C. asperatus (Fisher). The first two also repr…
Seven new species within western Atlantic Starksia atlantica, S. lepicoelia, and S. sluiteri (Teleostei, Labrisomidae),…
Specimens of Starksia were collected throughout the western Atlantic, and a 650-bp portion of the mitochondrial gene cytochrome oxidase-c subunit I (COl) was sequenced as part of …