Volume 51 – Issue 2 (Jun 1986)

ABSTRACT <em>Carex roanensis</em> F.J. Hermann was rediscovered near Ernestville, Unicoi County, Tennessee. The habitat was a gneiss ledge overlain with rich soil on a steep hardwood slope near <em>Fagus</em> and <em>Betula</em> trees. Specimens (Churchill 85132; 85221) have been deposited at the National, Michigan State, University of Tennessee and Vanderbilt herbaria.

ABSTRACT Eight species of Phlox occur in the Ohio flora: <em>P. divaricata</em>, <em>P. glaberrima</em> var. <em>triflora</em>, <em>P. latifolia</em>, <em>P. maculata</em>, <em>P. paniculata</em>, <em>P. pilosa</em>, <em>P. stolonifera</em>, and <em>P. subulata</em> var. <em>subulata</em> and var. <em>brittonii</em>. <em>Phlox glaberrima</em> var. <em>glaberrima</em> (incl. var. <em>melampyrifolia</em>) and var. <em>interior</em> are excluded from the state’s flora.

ABSTRACT Floristic data and county dot distribution maps are presented for eight species of the Polygalaceae in the Ohio flora. Evidence of rarity in the state for five species is presented. Taxonomic and nomenclatural problems for five species are discussed.

ABSTRACT Distributional and habitat data are presented for sixteen taxa of vascular plants from the Appalachian Plateau and Ridge and Valley Provinces of the state of Maryland. Five of these taxa are reported for the first time from Maryland: <em>Helianthus laevigatus</em>, <em>Juncus articulatus</em>, <em>Solidago curtisii</em>, <em>Viola rostrata</em> X <em>V. striata</em>, and the <em>Vittaria gametophyte</em>. Five species currently are listed as rare or endangered in Maryland: <em>Cyperus lancastriensis</em>, <em>Dryopteris campyloptera</em>, <em>Epilobium leptophyllum</em>, <em>Lemna trisulca</em>, and <em>Poa alsodes</em>. Information is provided for four other significant indigenous taxa: <em>Aconitum uncinatum</em>, <em>Carex debilis</em> var. <em>rudgei</em>, <em>Carex digitalis</em>, and <em>Solidago arguta</em> var. <em>harrisii</em>. The occurrence of three non-indigenous species is discussed: <em>Arthraxon hispidus</em>, <em>Microstegium vimineum</em>, and <em>Veronica chamaedrys</em>. Suggestions are made for future revisions of Maryland’s list of rare and endangered species.

ABSTRACT A survey of the vascular flora of the Barataria Basin, an interdistributary coastal basin in the Mississippi deltaic plain, contains six types of vegetative communities: bottomland hardwood forest, swamp, freshwater marsh, brackish marsh, salt marsh, and successional types of disturbed areas. The survey resulted in a vascular plant of 113 families, 313 genera, and 523 species.

ABSTRACT Paynes Prairie State Preserve is located in north-central peninsular Florida, south of Gainesville, in Alachua County. The plant communities of the basin form a diverse and fluctuating mosaic, and are typical of the freshwater marshes and prairies of north-central Florida. The hammock adjacent to Alachua Sink contains numerous sinkholes, is rich in species, and shows little evidence of human or natural disturbance. A taxonomic study of the vascular flora was conducted on the 5600 ha basin and the 10.4 ha hammock. Collections were made from April 1981 to October 1982 and the names are compiled in an annotated list which contains 422 species (423 taxa) representing 108 families. Range extensions are noted for five species occurring on the basin, and the newly described <em>Forestiera godfreyi</em> is reported from the hammock. The plant communities of the basin are also described with respect to floristics, physiognomy, and length of inundation.

ABSTRACT The discovery, geographic extent, and growth characteristics of a triploid, yellow-flowered <em>Erythronium</em> are reported. The morphology, ecology, and life cycle of the triploid are indistinguishable from <em>Erythronium rostratum</em>, a diploid species that bounds it on three sides. The triploid occurs at the western margin of the range of <em>Erythronium rostratum</em>, and is the predominant form across an eight-county region in northwestern Arkansas, northeastern Oklahoma, and southwestern Missouri. Populations of diploids and triploids share low frequencies of flowering individuals and aggressive vegetative reproduction. Triploids show reduced pollen fertility and seed production compared to the diploid. Identifiable mitotic chromosomes occur as pairs in the diploid and sets of three in the triploid. An autotriploid origin in southeastern Washington or southwestern Madison counties, Arkansas, is proposed.