Volume 75 - Issue 2 (June 2010)

Asimina angustifolia Raf., Slimleaf pawpaw (ANNONACEAE)—Charleston County: Asimina angustifolia was collected on Wadmalaw Island, South Carolina near the end of Brigger Hill Road on April 22, 2008 with Richard Porcher and Billy McCord and originally identified by Patrick McMillan at the Clemson herbarium. The population was found growing in a mixed hardwood forest on a bluff overlooking Adams Creek near the Town of Rockville, South Carolina. Voucher specimens from this population have been placed in The Citadel herbarium (CITA) in Charleston, South Carolina and in the Clemson University herbarium (CLEMS). Significance. This collection represents a significant range extension to the northeast and is a state record for Asimina angustifolia in South Carolina. According to collections from the University of North Carolina herbarium (NCU), the closest, observed populations of A. angustifolia are from Tattnall and Toombs Counties in southern Georgia. Of particular note was the presence of zebra swallowtail (Eurytides marcellus) larvae feedings upon the leaves of several individuals. It is suspected that a larger population of Asimina occurs nearby to support this population of zebra swallowtail butterflies, an obligate to Asimina spp. (Scott 1986).

Erythronium umbilicatum Parks & Hardin ssp. monostolum Parks & Hardin, Southern Appalachian Trout Lily (LILIACEAE)— Etowah County: four discrete colonies, the largest 20 m in diameter and containing thousands of plants, in oldgrowth mixed mesophytic forest on the base of north-facing limestone ledges and on the adjacent flood plain of Clear Creek at 185 m (600 ft.) elevation.

Significance. This is the first record of Erythronium umbilicatum ssp. monostolum in Alabama. Previously it has been known only as endemic to high elevation (1,400–1,600 m) cove forests or grassy areas on peaks in the mountains of North Carolina and Tennessee (Flora of North America 2002). This occurrence is 250 mi southwest of the nearest populations in the Smokies (Weakley 2008).

ABSTRACT Viburnum ozarkense was recently resurrected as a distinct species after having been synonymized with the related and partially sympatric Viburnum molle for much of the latter half of the 20th century. Presently, V. ozarkense is considered to be endemic to the Interior Highlands physiographic region of western Arkansas, southern Missouri, and eastern Oklahoma. However, this research suggests that although V. ozarkense is morphologically distinct from V. molle, it cannot be distinguished from V. bracteatum, a species found more than 500 km away in southeastern Tennessee, northeastern Alabama, and northwestern Georgia. Based on morphological and phytogeographical evidence, V. ozarkense is here considered to be conspecific with V. bracteatum. An overview of the expanded taxonomic concept, distribution, ecology and rarity of V. bracteatum is provided.