"Reproductive Biology of goodyera oblongifolia (orchidaceae)" in Madrono

"Biosystematic studies in the genus Piperia (Orchidaceae)" in Theses and Projects

"Biosystematics of the genus Piperia Rydb. (Orchidaceae)" in Botanical Journal

"Dodsonia, a new Ecuadorian genus of the zygopetalinae (orchidaceae)" in Selbyana

"Pollination biology of Listera Cordata (Orchidaceae)" in American Journal of Botany

"The Effectiveness of Fungus Gnats as Pollinators" in American Journal of Botany

"Pollination biology of calypso bulbosa var. occidentals (orchidaceae): a food-deception system" in Madrono

"Pollen Morphology of the Chloraeinae (Orchidaceae: Diurideae) and related subtribes" in American Journal of Botany

"Two new species of the chondrorhyncha complex (orchidaceae: zygopetalinae)" in Selbyana

"Stratum, Tree, and Flower Selection by Tropical Bees: Implications for the Reproductive Biology of Outcrossing Cochlospermum Vitifolium in Panama" in Ecology

"Food-Foraging Behavior of Male Euglossini (Hymenoptera: Apidae): Vagabonds or Trapliners?" in Biotropica

"Diversity and Seasonality of Male Euglossine Bees (Hymenoptera: Apidae) in Central Panamá" in Ecology

"On the Evidence for a Primitively Epiphytic Habit in Orchids" in Systematic Biology

"Euglossine bee pollination of the orchid, Cochleanthes Lipscombiae: a food source mimic" in American Journal of Botany

"Longevity of Euglossine Bees" in Biotropica

"Relative pollinator effectiveness and evolution of floral traits of Spathiphyllum Friedrichsthalii (Araceae)" in American Journal of Botany

"Two new species of epidendrum with lateral inflorescences" in Selbyana

"Coping with the epiphytic existence: pollination strategies" in Selbyana

"Limitations to Fruit Production in Ionopsis utricularioides (Orchidaceae)" in Biotropica

"Limitations to Sexual Reproduction in Encyclia krugii (Orchidaceae)" in Systematic Botany

"Asynchronous Phenologies of a Neotropical Orchid and Its Euglossine Bee Pollinator" in Ecology

"Geographic and Seasonal Variation in Fragrance Choices and Preferences of Male Euglossine Bees" in Biotropica

"Short- and Long-Term Limitations to Fruit Production in a Tropical Orchid" in Ecology

"Patterns and Maintenance of Extraordinary Variation in the Caribbean Orchid, Tolumnia (Oncidium) variegata" in Systematic Botany

"Ecological Effects of Hurricanes" in Bulletin of the Ecological Society of America

"Effects of display size, flowering phenology, and nectar availability on effective visitation frequency in Comparettia Falcata (Orchidaceae)" in American Journal of Botany

"Immediate Impact of Hurricance Hugo on a Puerto Rican Rain Forest" in Ecology

"Orchid-Phorophyte Relationships in a Forest Watershed in Puerto Rico" in Journal of Tropical Ecology

"A New Species of Lepanthes (Orchidaceae) from Puerto Rico" in Brittonia

"Factors associated with a rust infection (Sphenosphora saphena) in an epiphytic orchid (Tolumnia variegata)" in American Journal of Botany

"A Meager Nectar Offering by an Epiphytic Orchid is Better than Nothing" in Biotropica

An Orchid Flora of Puerto Rico and the Virgin Islands

"Fruit set in a deceptive orchid: The effect of flowering phenology, display size, and local floral abundance" in American Journal of Botany

"Review of Orchids of Jamaica" in Systematic Botany

"Variation in pollinator abundance and selection on fragrance phenotypes in an epiphytic orchid" in American Journal of Botany

"Evolutionary potential in orchids: patterns and strategies for conservation" in Selbyana

"The cost of selfing in Encyclia cochleata (Orchidaceae)" in Plant Systematics and Evolution

"Genetic Variation in a Widespread, Epiphytic Orchid: Where is the Evolutionary Potential?" in Systematic Biology

"A Nectar Reward: Is More Better?" in Biotropica

"Reproduction in an Orchid Can Be Resource-Limited over Its Lifetime" in Biotropica

"Biogeography of the Antilles Based on a Parsimony Analysis of Orchid Distributions" in Journal of Biogeography

"Diversity and host specificity of endophytic Rhizoctonia-like fungi from tropical orchids" in American Journal of Botany

"Composition Patterns of Caribbean Limestone Forests: Are Parsimony, Classification, and Ordination Analyses Congruent?" in Biotropica

"Flowering Phenology of Werauhia sintenisii, a Bromeliad from the Dwarf Montane Forest in Puerto Rico: an Indicator of Climate Change?" in Selbyana

"Review of Orchids and their conservation" in Madrono

"Does Flower Color Variation Matter in Deception Pollinated Psychilis monensis (Orchidaceae)?" in Oecologia

"The Flexible Breeding System of Werauhia sintenisii, a Cloud Forest Bromeliad from Puerto Rico" in Biotropica

"Land-Use History Affects the Distribution of the Saprophytic Orchid Wullschlaegelia calcarata in Puerto Rico's Tabonuco Forest" in Biotropica

"Bat Pollination Breakdown in the Caribbean Columnar Cactus Pilosocereus royenii" in Biotropica

"Widespread mycorrhizal specificity correlates to mycorrhizal function in the neotropical, epiphytic orchid Ionopsis utricularioides (Orchidaceae)" in American Journal of Botany

"Orchids of the West Indies: predictability of diversity and endemism" in Journal of Biogeography

"Site Variation in Spatial Aggregation and Phorophyte Preference in Psychilis monensis (Orchidaceae)" in Biotropica

"Oeceoclades maculata, an alien tropical orchid in a Caribbean rainforest" in Annals of Botany

"Riding across the Selection Landscape: Fitness Consequences of Annual Variation in Reproductive Characteristics" in Philosophical Transactions: Biological Sciences

"Are deception-pollinated species more variable than those offering a reward?" in Plant Systematics and Evolution

"Can extinction risk help explain plant-pollinator specificity among euglossine bee pollinated plants?" in Oikos

"Orchidaceae" in Flora of the Cayman Islands

"Nutrient limitation restricts growth and reproductive output in a tropical montane cloud forest bromeliad: findings from a long-term forest fertilization experiment" in Oecologia

Orchid flora of the Greater Antilles

"Terrestrial orchids in a tropical forest: best sites for abundance differ from those for reproduction" in Ecology

"When stable-stage equilibrium is unlikely" in Annals of Botany

"Invasive Syzygium jambos trees in Puerto Rico" in Journal of Tropical Ecology

"Biotic resistance in the tropics: patterns of seed plant invasions within an island" in Biological Invasions

"Determinants of orchid species diversity in world islands" in The New Phytologist

"Land use legacy for a tropical myco-heterotroph: how spatial patterns of abundance, reproductive effort and success vary" in Journal of Plant Ecology

"Island biogeography of native and alien plant species: Contrasting drivers of diversity across the Lesser Antilles" in Diversity and Distributions

"Small Populations on Small Islands: What Chance Does an Orchid Have?" in International Journal of Plant Sciences

"Natural history of the often-misunderstood Govenia utriculata (Orchidaceae): discovery of a Mexican population upsets West Indies endemism" in Phytotaxa

"Ornamentals lead the way: global influences on plant invasions in the Caribbean" in NeoBiota

"Future changes in the distribution of two non-indigenous orchids and their acquired enemy in Puerto Rico" in Biological Invasions

"Trick or treat? Pollinator attraction in Vanilla pompona (Orchidaceae)" in Biotropica

"Alien species affect the abundance and richness of native species in tropical forests: The role of adaptive strategies" in Ecosphere

"Beyond the various contrivances by which orchids are pollinated: global patterns in orchid pollination biology" in Botanical Journal of the Linnean Society

"Host suitability for germination differs from that of later stages of development in a rare epiphytic orchid" in Lankesteriana