Boom, B. M. (The New York Botanical Garden, Bronx, NY 10458 U.S.A.; bboom@nybg.org). A new species of Remijia (Rubiaceae) from Amazonian Brazil. Brittonia 57: 105–107. 2005.—Remijia hubbardiorum B. M. Boom, endemic to white sand campinas or terra firme forest in the Rio Uatumã region in the State of Amazonas of north central Brazil, is described and illustrated, and its morphological differentiation with respect to R. asperula Standley is discussed.

Gomes-Klein, V. L. (Departamento de Biologia Geral, Universidade Federal de Goiás, Campus II, ICB-1, 74001-970, Goiânia, Goiás, Brazil; vlgomes@icb.ufg.br) & J. R. Pirani (Departamento de Botânica, IB, Universidade de São Paulo, Caixa Postal 11461, 05422-970, São Paulo, SP, Brazil; jrpirani@ib.usp.br). Four new species of Cayaponia (Cucurbitaceae) from Brazil and Bolivia. Brittonia 57: 108–117. 2005.—Four new species of Cayaponia are described and illustrated: three from Brazil (C. cogniauxiana, C. nitida and C. rugosa) and one from Brazil and Bolivia (C. ferruginea).

Daly, Douglas C. (The New York Botanical Garden, Bronx, NY 10458-5126; ddaly@nybg.org). Dacryodes edilsonii, a new species from southwestern Amazonia. Studies in neotropical Burseraceae XII. Brittonia 57: 118–122. 2005.—Dacryodes edilsonii Daly (Burseraceae) is one of at least 14 still undescribed neotropical species in the genus; it is also one of a large number of new species emerging from intensified botanical exploration of the Brazilian state of Acre in southwestern Amazonia. The new species is easily distinguished from most other Neotropical species of the genus by its usually densely long-pubescent petiole, rachis, petiolules, and abaxial midvein.

Sundue, M. A. (Institute of Systematic Botany, The New York Botanical Garden, Bronx, NY 10458–5126, U.S.A.; msundue@nybg.org) & J. Prado (Instituto de Botânica, Caixa Postal 4005, 01061-970, São Paulo, Brazil; jprado@dialdata.com.br). Adiantum diphyllum, a rare and endemic species of Bahia State, Brazil, and its close relatives. Brittonia 57: 123–128. 2005.—Adiantum diphyllum, a species endemic to the coastal forests of Bahia State, Brazil, is characterized and distinguished from other species of Adiantum with anastomosing veins, elongate sori, and venuloid idioblasts.

Sundue, M. A. (Institute of Systematic Botany, The New York Botanical Garden, Bronx, NY 10458-5126, U.S.A.; msundue@nybg.org) & J. Prado (Instituto de Botânica, Caixa Postal 4005, 01061-970, São Paulo, Brazil; jprado@dialdata.com.br). Adiantum diphyllum, a rare and endemic species of Bahia State, Brazil, and its close relatives. Brittonia 57:123–128. 2005.—Adiantum diphyllum, uma espécie endêmica das florestas costeiras do leste do Brasil, é caracterizada e distinta das outras espécies de Adiantum com nervuras anastomosadas, soros alongados e idioblastos entre as nervuras.

Cabral, E. L. (Facultad de Ciencias Exactas, Naturales y Agrimensura [UNNE], Instituto de Botánica del Nordeste, Casilla de Correo 209, 3400 Corrientes, Argentina; ibone@agr.unne.edu.ar) and N. M. Bacigalupo (Instituto de Botánica Darwinion, Casilla de Correo 22, B1642HYD, San Isidro, Buenos Aires, Argentina; nbacigalupo@darwin.edu.ar). Novelties in Spermacoceae (Rubiaceae) from Bolivia and Paraguay. Brittonia 57: 129–140. 2005.—One new Bolivian species (Borreria pazensis) and three new varieties (Borreria densiflora var. minima, Richardia. scabra var. chacoensis and Staelia virgata var. killeenii) are described and illustrated. The genus Diodella, with three species (D. apiculata comb. nov., D. radula comb. nov., and D. teres), is reported for the first time. Borreria limae, B. wunschmannii, B. scabiosoides var. scabiosoides, and B. scabiosoides var. anderssonii are also reported as new to Bolivia.

Cabral, E. L. (Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste. Instituto de Botánica del Nordeste, Casilla de Correo 209, 3400, Corrientes, Argentina; ibone@agr.unne.edu.ar). Notes on Galianthe (Spermacoceae, Rubiaceae) in the Bolivian flora. Brittonia 57: 141– 149. 2005.—Four new species of Galianthe (G. boliviana, G. chiquitosana, G. sudyungensis, and G. kempffiana) for Bolivia are described and illustrated. Galianthe kempffiana is also known from Brazil. Galianthe laxa and G. bisepala are reported for the first time for Bolivia.

González-Elizondo, M. S., J. A. Tena-Flores (CIIDIR, Instituto Politécnico Nacional Unidad Durango, Apartado Postal 738, Durango, Durango, 34000, Mexico; sgonzalez53@prodigy.net.mx); M. T. Alarcón-Herrera, E. Flores-Tavizón & N. Barajas-Acosta (Centro de Investigación en Materiales Avanzados CIMAV, Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, Chih. 31109, Mexico). An arsenic-tolerant new species of Eleocharis (Cyperaceae) from Chihuahua, Mexico. Brittonia 57: 150–154. 2005.—A new aquatic, arsenic-tolerant species of Eleocharis (Cyperaceae) endemic to Chihuahua, Mexico, is described and illustrated. It belongs to Eleocharis sect. Eleogenus series Maculosae. A key for the species of Eleocharis sect. Eleogenus from Mexico is included.

M.S. González-Elizondo, J.A. Tena-Flores (CIIDIR, Instituto Politécnico Nacional Unidad Durango, Apartado Postal 738, Durango, Dgo., 34000, México; sgonzalez53@prodigy.net.mx); M.T. Alarcón-Herrera, E. Flores-Tavizón & N. Barajas-Acosta (Centro de Investigación en Materiales Avanzados CIMAV, Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, Chih., 31109, México). An arsenic-tolerant new species of Eleocharis (Cyperaceae) from Chihuahua, Mexico. Brittonia 57: 150–154. 2005.—Se describe e ilustra una nueva especie de Eleocharis (Cyperaceae) acuática, tolerante a altas concentraciones de arsénico, y endémica de Chihuahua, México. Forma parte de la sección Eleogenus serie Maculosae. Se incluye una clave para las especies de Eleocharis sect. Eleogenus de México.

Cornejo, X. (Herbarium GUAY, University of Guayaquil; xcornejoguay@hotmail.com) & H. H. Iltis (Department of Botany, University of Wisconsin, 430 Lincoln Drive, Madison, WI 53706, U.S.A.; tscochra@facstaff.wisc.edu). Studies in the Capparaceae XXIII: Capparis coimbrana, a new species from Bolivia. Brittonia 57: 155–161. 2005.—Capparis coimbrana, a tree of the Bolivian and adjoining Brazilian subtropical to warm-temperate seasonal dry forests and savannas, is segregated from C. petiolaris of the Pacific slope of Ecuador and northern Peru by its subcylindrical fruits (vs. spherical), white pulp (vs. yellow), sepals 3–5 mm (vs. 1–3 mm), leaves with 13–24 (vs. 8–15) lateral veins per side, and by 1000 km of geographic isolation. The new species has edible fruits, but is not domesticated. The specific epithet celebrates Germán Coimbra S., eminent Bolivian ethnobotanist.

Cornejo, X. (Herbario GUAY, Universidad de Guayaquil; xcornejoguay@hotmail.com) & H. H. Iltis (Department of Botany, University of Wisconsin, 430 Lincoln Drive, Madison, WI 53706, U.S.A.; tscochra@facstaff.wisc.edu). Studies in the Capparaceae XXIII: Capparis coimbrana, a new species from Bolivia. Brittonia 57: 155–161. 2005.—Capparis coimbrana es un árbol del bosque seco y sabanas subtropicales y cálidas de Bolivia y la parte adyacente de Brasil, segregada de Capparis petiolaris, que se encuentra distribuida en la región del Pacífico de Ecuador y norte de Perú, por sus frutos subcilíndricos (vs. esféricos), pulpa blanca (vs. amarilla), sépalos 3–5 mm (vs. 1–3 mm), hojas con 13–24 (vs. 8–15) pares de venas laterales, y aislada geográficamente 1000 km. Esta nueva especie posee frutos comestibles, pero no está domesticada. Su epíteto específico honra a Germán Coimbra S., eminente etnobotánico boliviano.

Iltis, H. H. (Department of Botany, University of Wisconsin, 430 Lincoln Drive, Madison Wisconsin 53706, U.S.A.; tscochra@facstaff.wisc.edu). Studies in the Capparaceae XXIV: Edward Palmer in Corumbá, Brazil and the first collection of Capparis coimbrana. Brittonia 57: 162–166. 2005.—The new Bolivian endemic, Capparis coimbrana, was first collected by the 22-year-old Edward Palmer while a member of the U.S. Navy's “Exploration of the River La Plata” expedition, supervised under Captain T. J. Page from 1853–1856. Since the plant specimen lacks a specific geographic location, it was necessary to interpret carefully the cryptic, penciled notes that accompany it, and to correlate these with the published itinerary of the expedition's sailing vessel, the Water Witch. This historical research revealed that the plant must have been collected on 2 Dec 1853 at Corumbá, Matto Grosso, Brazil, which was then a tiny village just across the Río Paraguay from Puerto Suárez, Bolivia. This site is at the very edge of the species' current range.

Budke, J. M., R. J. Hickey & K. D. Heafner (Miami University, Department of Botany, 316 Pearson Hall, Oxford, OH 45056, U.S.A.; jessica.budke@uconn.edu). Analysis of morphological and anatomical characteristics of Isoetes using Isoetes tennesseensis. Brittonia 57: 167–182. 2005.—The three known populations of Isoetes tennesseensis were examined to document and analyze their morphological and anatomical characters. Characters examined included velum coverage, lacunae, leaf form and size, sporangial wall cells, and ligule and labium morphology. Three types of morphological patterns were found: stable, variable, and dimorphic. The discovery of dimorphism between mega- and microsporophylls for velum coverage, velum length, sporangium size, and ligule shape is of particular interest. This study presents a model for future work designed to complement current species descriptions and it establishes a baseline for morphological comparisons with other Isoetes.

Watkins, Jr. J. E¹ and D. R. Farrar (Department of Botany, Iowa State University Ames, Iowa 50010, U.S.A.; ewatkins@ufl.edu). Origin and taxonomic affinities of Thelypteris (subgen. Stegnogramma) burksiorum (Thelypteridaceae). Brittonia 57: 183–201. 2005.—This paper examines the ecology, frond and spore morphology, gametophytes, and molecular biology of Thelypteris burksiorum to reveal its taxonomic affinities and phytogeographic origin. The species is endemic to Winston County in northern Alabama (U.S.A.) and only occurs in cave-like rockhouse habitats. A related species, T. pilosa, is widespread in central and southern Mexico, Guatemala, and Honduras. Thelypteris pilosa is extremely variable and our data suggest that current recognition of the varieties major and pilosa is not warranted. Thelypteris pilosa is clearly closely related and likely sister to T. burksiorum. Thelypteris burksiorum exhibits the unusual production of gametophytic propagules. This, in combination with current levels of genetic diversity and reproductive biology, suggests that T. burksiorum is an ancient Tertiary relict and not an example of recent long distance dispersal. Selection in rockhouse habitats has driven species away from their normal life cycle to partial or complete reliance on the gametophyte generation. The combination of a reduced yet fertile sporophyte and a gametophyte that may rely on gametophytic proliferation places T. burksiorum in an intermediate evolutionary position relative to other rockhouse pteridophytes.