Eupatorium paludicola (Asteraceae) is a new species from the Atlantic Coastal Plain of North and South Carolina. It resembles E. leucolepis (DC.) Torr. & A. Gray, from which it is most readily ...distinguished by very narrow (2–4.5 mm wide) ascending-recurved to erect-incurved leaves, and by shorter involucres, pappi, and cypselae. It inhabits isolated, herb-dominated wet depressions with variable hydrology such as clay-based Carolina bays.
A new combination is made: Lechea pulchella Raf. var. ramosissima (Hodgdon) Sorrie & Weakley. Se hace la nueva combinación: Lechea pulchella Raf. var. ramosissima (Hodgdon) Sorrie & Weakley.
We assess variation within Lechea marítima and provide a key to infraspecific taxa. Specimen citations document the range of L. maritima var. virginica. Se valora la variación en Lechea maritima y se ...aporta una clave de taxa infraspecíficos. Las citas de especímenes documentan el área L. marítima var. virginica.
REINSTATEMENT OF SAGITTARIA MACROCARPA (ALISMATACEAE) Sorrie, Bruce A.; Keener, Brian R.; Edwards, Adrienne L.
Journal of the Botanical Research Institute of Texas,
08/2007, Letnik:
1, Številka:
1
Journal Article
Recenzirano
Sagittaria macrocarpa J.G. Sm. is here restored to full species status. A narrow distribution, the rarity of specimens available for study, and morphological similarity to closely related taxa has ...contributed to this species being overlooked or misidentified for a century. Recent research in population genetics, molecular sequencing, and morphology support the hypothesis that Sagittaria macrocarpa is distinct from congeners. In addition, the taxon occupies a unique range of habitats and apparently a limited distribution. Se restaura aquí a Sagittaria macrocarpa J.G. Sm. al status de especie. Una distribución restringida, la rareza de los especímenes disponibles para su estudio, y la semejanza morfológica con taxa relativamente próximos ha contribuido a que esta especie sea pasada por alto o se identifique erróneamente durante un siglo. Investigaciones recientes en genética de poblaciones, secuenciación molecular, y morfologia apoyan la hipótesis que Sagittaria macrocarpa es diferente de sus congéneres. Además, el taxon ocupa un único rango de habitats y aparentemente una distribución limitada.
Drosera filiformis and D. tracyi occupy allopatric ranges, except for one restricted area in northwest Florida. Drosera filiformis is nearly restricted to the Atlantic Coastal Plain; D. tracyi is ...restricted to the Gulf Coastal Plain. The two species have been found to grow sympatrically in only one limited area. Natural hybrids are unknown. The distribution of D. filiformis is notable for its series of disjunct populations; only three other Atlantic Coastal Plain species are distributed in a similar pattern. The distribution of D. tracyi is continuous and without disjunctions. Many Gulf Coastal Plain species share this pattern, including close relatives of the four Atlantic disjuncts. It is postulated that the Atlantic disjuncts assumed their current discontinuous distributions through a series of short to moderately long dispersal events, followed by a loss of intervening populations. Either the Atlantic disjuncts were derived from their Gulf Coast counterparts, or both geographic groups were derived from a now extinct precursor.
Lilium pyrophilum M. W. Skinner & Sorrie is a new taxon from the Sandhills region of the Atlantic Coastal Plain, where it is known from 16 counties in the Carolinas and adjacent Virginia. It occurs ...within the longleaf pine ecosystem in sandy, wet to dry ecotonal situations such as streamheads, seeps, swampy streams, and wet, maintained powerlines. Lilium pyrophilum is most closely allied to L. superbum but is allopatrically distributed and confined to a restricted hahitat. Compared to L. superbum it blooms later, is smaller, has fewer and smaller flowers with slightly longer tubes, and it has shorter and relatively broader leaves that are ascending and concentrated in fewer whorls toward the bottom of the stem. Frequent fires are essential for habitat maintenance in natural settings, and thus the Latin epithet pyrophilum (= fire loving) is used for the new taxon. We suggest the common name Sandhills lily for this rare lily, and urge its fullest protection.
Thirty-four vascular plant taxa not previously or only incompletely documented from the North Carolina coastal plain are reported with vouchers for each county of occurrence. These comprise 22 ...monocots (including nine Poaceae and eight Cyperaceae) and 12 dicots. Noteworthy records are reported for another seven plant taxa, and one taxon is deleted from the flora of North Carolina.
Lycopus cokeri Ahles, a narrow endemic to the Sandhills region of North and South Carolina, was never validly published, although included in the Guide to the Vascular Flora of the Carolinas ...(Radford, Ahles, and Bell 1964). Field and herbarium studies have shown that this taxon is morphologically distinct from related taxa, that it occupies a unique range and habitat, and that it is valid at the species level. A Latin diagnosis is provided to validate publication. A key to Carolinian Lycopus is given.
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