Robert F. C. Naczi

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We investigate the species discriminatory power of a subset of the proposed plant barcoding loci (matK, rbcL, rpoC1, rpoB, trnH-psbA) in Carex, a cosmopolitan genus that represents one of the three largest plant genera on earth (c. 2000 species). To assess the ability of barcoding loci to resolve Carex species, we focused our sampling on three of the(More)
A taxonomic study by Naczi, Reznicek, and Ford (American Journal of Botany, 85, 434-447, 1998) has determined that three species (Carex willdenowii, C. basiantha, and C. superata) can be recognized within the C. willdenowii complex. To determine the amount of genetic divergence within and between these species, allozyme analyses were conducted on 14(More)
Field studies as well as principal components analysis and analyses of variance of specimen measurements revealed morphologic variation within Carex willdenowii correlated with differences in geographical distribution and habitat characteristics. C. willdenowii is actually a complex of three species, C. basiantha Steudel, C. willdenowii Willdenow, and C.(More)
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)
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)
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)
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)
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 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)