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Costea, M. (University of Guelph, Department of Plant Agriculture, Guelph, ON, N1G 2W1, Canada; firstname.lastname@example.org) and F. J. Tardif (University of Guelph, Department of Plant Agriculture, Guelph, ON, N1G 2W1, Canada; email@example.com). Taxonomy of the Polygonum douglasii (Polygonaceae) complex with a new species from Oregon. Brittonia 57: 1–27. 2005.—The taxonomy of the Polygonum douglasii complex is revised. A summary of relevant taxonomic information is provided, along with a key to the species and subspecies, plus typification, synonymy, discussion, distribution, and ecology. Morphology and micromorphology of stems, leaves, perianth, pollen, and achenes are analyzed and illustrated. Based on these data, 12 species and two subspecies are recognized. A new species, P. gabrielae, is described and illustrated from Oregon.
Groppo, M. (Herbarium, Instituto de Biociências, Universidade de São Paulo, Caixa Postal 11461, 05422–970, São Paulo, Brazil; firstname.lastname@example.org), J. A. Kallunki (The New York Botanical Garden, Bronx, NY 10458–5126, U.S.A.), & J. R. Pirani (Instituto de Biociências, Universidade de São Paulo, Caixa Postal 11461, 05422–970, São Paulo, Brazil). Synonymy of Hortia arborea with H. brasiliana (Rutaceae) and a new species from Brazil. Brittonia 57: 28– 34. 2005.—A review of the usage of Hortia brasiliana Vand. ex DC. and H. arborea Engl. is given. The first name has been applied incorrectly to a shrubby species which occurs in the “cerrados” and “campos sujos” (Brazilian savannas) in Rondônia, western Minas Gerais, and central Brazil; the second name pertains to an arborescent species in forests of eastern Brazil. The type specimen of H. brasiliana (of which H. arborea is a synonym) is the same as the arborescent species of eastern Brazil. The name Hortia oreadica is here proposed for the shrubby species of central Brazil, a previously undescribed species. A description, the uses, and the local names, as well as an illustration and distribution map of H. oreadica are presented. The name Hortia arborea Engl. is lectotypified.
Martínez, M. (Escuela de Biología, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Centro, Querétaro, Querétaro 76010 Mexico; email@example.com), & O. Vargas (Instituto de Botánica, Departamento de Botánica y Zoología, CUCBA, Universidad de Guadalajara, Apartado Postal 139, Zapopan, Jalisco 45100 Mexico; firstname.lastname@example.org). A new species of Tzeltalia (Solanaceae) from Mexico. Brittonia 57: 35–38. 2005.—A new species of Tzeltalia (Solanaceae) from Chiapas, Mexico is described and illustrated: Tzeltalia esenbeckii. A key and a table, distinguishing the members of the genus, are included.
Kriebel, R. (Instituto Nacional de Biodiversidad (INB), Apdo. 22–3100, Santo Domingo, Heredia, Costa Rica; email@example.com). A new species of Columnea and range extension in the Gesneriaceae from Costa Rica. Brittonia 57: 39–42. 2005.—Columnea lariensis is described and illustrated as a new species from the Talamanca Mountains, Costa Rica. It is similar to C. canarina from Panama. Alloplectus weirii is here reported for the first time from Mesoamerica and an illustration is provided.
Rodríguez-Arévalo, I.*, R. Lira & I. Calzada (Unidad de Biotecnología y Prototipos, Universidad Nacional Autónoma de México, Campus Iztacala, Avenida de los Barrios s.n. Los Reyes lztacala, Tlalnepantla, Estado de México, C.P. 54090, México; *firstname.lastname@example.org). A new species of Sicyos L. (Cucurbitaceae) from Oaxaca, Mexico. Brittonia 57: 43–46. 2005.—Sicyos mcvaughii, a new species from Oaxaca, is described and illustrated. It is similar to Sicyos sertuliferus Cogn., and grows in secondary tropical deciduous forest, between 20 and 630 meters.
Lesica, P. (Herbarium, Division of Biological Sciences, University of Montana, Missoula, MT 59812 and Montana Natural Heritage Program, 1515 E. Sixth Ave, Helena, MT 59620, U.S.A.; email@example.com). The resurrection of Erigeron parryi. Brittonia 57: 47–54. 2005.—Erigeron parryi was described in 1890 from a single collection from southwest Montana. No additional collections were made during the following 90 years. Recent floristic treatments have synonomized E. parryi under E. ochroleucus. I used principal components and discriminant analyses of morphological characters to examine the relationship of E. parryi to its presumed closest relatives, E. ochroleucus, E. radicatus, and E. scribneri, in light of several populations discovered in the past 20 years. Erigeron parryi should be considered a distinct species. It can be readily distinguished from closely related species based on indument and caudex morphology. It is allopatric with E. ochroleucus and E. scribneri and ecologically separated from E. radicatus. Erigeron scribneri is intermediate between E. ochroleucus and E. radicatus and is probably best treated as a variety of one or the other of these species.
Chen, W. H. (Kunming Institute of Botany, the Chinese Academy of Sciences, Heilongtan, Kunming, Yunnan 650204, China; firstname.lastname@example.org) & Y. M. Shui (Kunming Institute of Botany, the Chinese Academy of Sciences, Heilongtan, Kunming, Yunnan 650204, China; email@example.com). A new species of Thrixspermum (Orchidaceae) from China. Brittonia 57: 55–58. 2005.—A new species from China, Thrixspermum tsii (Orchidaceae), is described and illustrated and its relationships to T. centipeda and T. subulatum are discussed.
Carlquist, S. (Santa Barbara Botanic Garden, 1212 Mission Canyon Road, Santa Barbara, California 93105, U.S.A.; firstname.lastname@example.org). Wood and bark anatomy of Muntingiaceae: A phylogenetic comparison within Malvales s. l. Brittonia 57: 59–67. 2005.—Quantitative and qualitative data on wood and bark anatomy are given for Muntingia calabura L. and Dicraspidia donnell-smithii Standley. These data are compared with phylogenetic schemes, based on DNA analysis, in which Muntingiaceae belong to the “dipterocarp clade” within Malvales. The data are consistent with this hypothesis, although Muntingiaceae lack pit vestures in vessels, which are seen in the other malvalean families (Cistaceae, Dipterocarpaceae, Neuradaceae, Sarcolaenaceae, Thymeleaceae), and this may represent a loss of pit vestures. All families of the dipterocarp clade agree with both genera of Muntingiaceae in having tracheids as the imperforate tracheary element type (at least ancestrally), although fiber-tracheids also occur in some Dipterocarpaceae and Thymeleaceae. The large size of some malvalean families (with attendant greater diversity in character states) and a paucity of wood studies in those families make for difficulty in comparison of features such as axial parenchyma and ray types with those of Muntingiaceae; character states of these features are consistent with placement of Muntingiaceae in the dipterocarp clade of Malvales. Banded phloem fibers in bark of Muntingiaceae are much like those of other Malvales. Wood of Muntingiaceae is highly mesomorphic according to quantitative vessel features.
Hecklau, E. F., S. A. Mori, and J. L. Brown (Institute of Systematic Botany, The New York Botanical Garden, Bronx, NY 10458-5126; email@example.com). Specific epithets of the flowering plants of central French Guiana. Brittonia 57: 68–87. 2005.—The epithets of the flowering plants of central French Guiana are classified into derivation categories. Specific epithets of the flowering plants of central French Guiana refer mostly to shapes (274 species), persons (252), places (212), appearance (146), and size (140). These categories account for 55% of names given to the plants of this flora. The most prolific publishers of names for the flora of central French Guiana are Aublet and Linnaeus, who were respectively the authors of 177 and 110 of the names of species (15% of the total) found in the flora of central French Guiana. Although many of the species names, such as those relating to place and person, are easy to categorize, many others are open to different interpretations. Specific epithets with different orthographies derived from Guiana or Guyana are discussed. In addition, problems in the use of diacritical marks and inconsistencies with spacing between the abbreviations of given names and surnames of authors of plant names are noted.
Kass, L. B. (L. H. Bailey Hortorium, Department of Plant Biology, Cornell University, Ithaca, NY 14853-4301, U.S.A; firstname.lastname@example.org.) Alice Northrop's type specimens for the Bahama flora. Brittonia 57: 88–101. 2005.—In 1902 Alice Northrop published an annotated checklist of the plants that she and her husband John had collected in the Bahamas, in 1890. She included 22 new species descriptions and 7 new species published elsewhere. She stated, “the type specimens are in the herbarium of Columbia University [now at NY],” with duplicate sets at other herbaria. William T. Gillis (1933–1979) found a set of the Northrops' specimens, labeled as Types, at the herbarium of the Field Museum (F) in Chicago. When Gillis compared the F specimens with illustrations in Northrop's publications, he concluded that most of the descriptions and illustrations had been made from these specimens, many of which he annotated as holotypes. Recently, I examined and compared both sets of specimens with Northrop's publications. While many of the F specimens are indeed the ones that were used for the descriptions and illustrations of the new species, the current International Code of Botanical Nomenclature (ICBN) does not permit the reassigning of type specimen designations. I conclude that Northrop's type specimens currently at NY are the holotypes, isotypes, syntypes, or lectotypes, and that the specimens she distributed are syntypes, isotypes, or isolectotypes.