Robert F. C. Naczi

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The carnivorous plant family Sarraceniaceae comprises three genera of wetland-inhabiting pitcher plants: Darlingtonia in the northwestern United States, Sarracenia in eastern North America, and Heliamphora in northern South America. Hypotheses concerning the biogeographic history leading to this unusual disjunct distribution are controversial, in part(More)
Although the polyphyletic genus Scirpus L. s.l. (formerly > 200 species) has been divided into more than 50 separate genera and now consists of only 64 species, its circumscription remains problematical. Three new genera have been segregated from Scirpus s.s. in the past decade, and the delimitation of Scirpus from its possible sister genus Eriophorum L.(More)
Rhynchospora leptocarpa (Slender-fruit Beaksedge, Cyperaceae) has recently been discovered existing in the Pine Barren region of southern New Jersey, and is now documented from six regional populations. Information substantiating this find and a key differentiating other local Rhynchospora species is provided, in addition to a species description and notes(More)
The New Manual of Vascular Plants of Northeastern United States and Adjacent Canada is an active project by New York Botanical Garden building upon the long history of floristic investigation for the large region. The chief goal of the New Manual is to enable identification of all vascular plants established and growing spontaneously in the region. New(More)
Rhynchospora glomerata and its closest relatives comprise a group of beakesedges widespread and frequent in much of North America. The classification of the R. glomerata complex remains unresolved and controversial. The goals of this study are to determine the number of taxa in the complex and their ranks, and identify their best diagnostic characters.(More)
The new species, Rhynchospora marliniana Naczi, W. M. Knapp & W. W. Thomas, is described, illustrated, and compared with morphologically similar species. Images are provided of its habitats, which are sunny, wet, and nutrient-poor savannas, pinelands, and streamsides in Belize, Honduras, Mexico, Nicaragua, and the southeastern USA. It is unique in(More)
Carex lucorum currently comprises two morphologically similar varieties. We revise the taxonomy of C. lucorum, and map the distribution of the taxa. Based on multivariate analyses and analyses of variance of measured characters, allopatry, and previous studies revealing differences in achene micromorphology, chromosome differences, and flavonoid chemistry,(More)
The New York Botanical Garden occupies 100 hectares (250 acres) in the north central portion of Bronx County, New York. The property is a public garden with the majority of the grounds under cultivation. The Thain Family Forest, margins of the Bronx River, rock outcrops and areas of undeveloped landscape are important refugia for spontaneous plants, both(More)
While some invasive plants are distinctive and easily recognized, many others are difficult to distinguish from one or more species of our native flora. For landowners, managers, and the general public, identifying confusing invasive plants can be extremely difficult. While many existing publications include identification tips, none present a complete(More)
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