Rare vascular plants of Crenshaw County,

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Rare vascular plants of Crenshaw County, Alabama
Alvin Diamond Department of Biological and
Environmental Sciences, Troy University, Troy, AL
36082
Abstract Crenshaw County has an area of 1,582
square km and lies in central south Alabama
approximately 160 km north of the Gulf of Mexico.
The vascular flora of the county was surveyed
from 1987 to 2006. A total of 1192 species and
two named hybrids in 589 genera from 160 families
were documented. Twenty-four species (2 of the
flora) documented during the study appear on the
2006 Inventory List of Rare, Threatened and
Endangered Plants, Animals and Natural
Communities of Alabama as compiled by the Alabama
Natural Heritage Program. The names of the rare
taxa are followed by designations of their
status. Each species has a global rank (G)
representing its status range-wide, and a state
rank (S) representing its status within Alabama.
A rank of 1 indicates those species that are
considered critically imperiled those with a
rank of 5 are considered secure.
Results Species documented from Crenshaw County
that appear on the 2006 Inventory List of Rare,
Threatened and Endangered Plants, Animals and
Natural Communities of Alabama. Scientific names
for the taxa are followed by the common name,
global rank, and state rank. Gentiana catesbaei
Elliott's gentian G5 S1 Lycopodiella cernua
nodding clubmoss G5 S1S2 Dryopteris celsa log
fern G4 S1 Cirsium muticum swamp thistle G5
S1 Helenium brevifolium little leaf sneezeweed
G3G4 S1 Rudbeckia auriculata eared coneflower G1
S1 Chamaecrista deeringiana Florida senna G2G3
S1 Thelypteris quadrangularis hairy maiden fern
G3G5 S2 Epidendrum conopseum green-fly orchid G4
S2 Ophioglossum engelmannii limestone
adder's-tongue G5 S2S3 Trillium decipiens
deceiving trillium G3 S2S3 Platanthera flava var
flava southern rein orchid G4T4? S2S3 Brickellia
cordifolia Flyr's brickell-bush G2G3 S2 Coreopsis
gladiata southeastern tickseed G4G5 S2 Helenium
vernale spring sneezeweed G4? S2 Rhododendron
austrinum orange azalea G3 S2S3 Astragalus
villosus hoary milk-vetch G4 S2 Baptisia
megacarpa Apalachicola wild indigo G2
S2 Dicerandra linearifolia large-flowered
pennyroyal G4G5 S2 Sida elliottii Elliott's
fan-petal G4G5 S2 Sarracenia leucophylla whitetop
pitcher-plant G3 S3 Salix humilis tall prairie
willow G5 S2S3 Stewartia malacodendron silky
camellia G4 S2S3 Euphorbia discoidalis euphorbia
G3? S2?
Baptisia megacarpa Apalachicola wild indigo
Rhododendron austrinum orange azalea
Map of Alabama with Crenshaw County indicated in
black.
Stewartia malacodendron silky camellia
Lycopodiella cernua nodding clubmoss
Astragalus villosus hoary milk-vetch
Dryopteris celsa log fern