keys to the vascular plants of east texas - Botanical Research ...

534 CYPERACEAE/CAREX
Carex davisii Schwein. & Torr. (for Emerson Davis, 1798–1866, amateur student of Carex),
EMERSON DAVIS’ CARIC SEDGE. A facultative sciophyte in rich, deciduous, calcareous woods, forest
edges, meadows, and shores; known from the n parts of the Blackland Prairie and Post Oak Savannah;
also e Cross Timbers and Prairies; se Canada and e U.S. except far se. Fruiting Apr–
May(–mid-Jun). Section Hymenochlaenae
Carex debilis Michx., (frail), WEAK CARIC SEDGE, WHITE-EDGE CARIC SEDGE. A facultative
sciophyte in low woods, low meadows, swamps, bogs, forest edges, and especially along creek
edges in forests; throughout the Pineywoods and in Leon and Wood cos. of the Post Oak Savannah;
also the extreme ne counties of the Gulf Prairies and Marshes; e U.S. from PA s to FL w to
MO, OK, and TX. Fruiting Apr–May(–Jul). Section Hymenochlaenae
Carex decomposita Muhl., (decompound), CYPRESS-KNEE CARIC SEDGE,. A facultative heliophyte
growing on decaying stumps in swamps, most often on Taxodium stumps; rare in ne part of
East TX in Marion and Wood cos. and in Liberty, Jasper, and San Jacinto cos. in the s part of the
Pineywoods; se U.S. from NY s to FL w to MO, OK, and TX. Fruiting late Apr–early Jun. (RARE
2001, 2002b: G3S1). Section Heleoglochin �
Carex digitalis Schkuhr ex Willd., (of a finger), SLENDER WOODLAND CARIC SEDGE. The following
two varieties are distinguished in the key to species. Section Careyanae
var. floridana (L.H. Bailey) Naczi & Bryson, (of Florida) ASYMMETRIC-FRUITED FINGER CARIC
SEDGE. A facultative sciophyte along mesic and submesic slopes, both lower and upper, of
mixed pine/hardwood forests and hardwood forests; e Pineywoods; se U.S. from NC s to FL w to
AR and TX. Fruiting late Mar–early Jun. [C. digitalis var. asymmetrica Fernald]
var. macropoda Fernald, (long-stalked), LONG-STALKED FINGER CARIC SEDGE. A facultative
sciophyte along mesic and submesic slopes, both lower and upper, of mixed pine/hardwood
forests and hardwood forests; throughout the Pineywoods; also ne part of the Gulf Prairies and
Marshes; se U.S. from PA s to FL w to MO and TX. Fruiting late Mar–early Jun.
Carex edwardsiana E.L. Bridges & Orzell, (of the Edwards Plateau), EDWARDS PLATEAU CARIC
SEDGE. A facultative sciophyte growing in the shade of trees, shrubs, or taller herbaceous plants;
mesic to submesic mixed juniper-hardwood forests and ravine slopes, in alkaline clay loams
and sandy clay loams; w edge of the Blackland Prairie in Bell, Bexar, Comal, Hays, and Travis
cos.; also the e edge of the Edwards Plateau contiguous with the Blackland Prairie; endemic to
TX (Carr 2002b, 2002c; Naczi & Bryson 2002). Fruiting Apr–May. [C. oligocarpa of TX authors
in part, not Schkuhr ex Willd.] This species is reported to occupy the driest habitats of any species
of Section Griseae and to range the farthest sw of any member of the section (Naczi &
Bryson 2002). Section Griseae E
Carex emoryi Dewey, (for Major William Hemsley Emory, 1811–1887, American solider who
worked on US/Mexican Boundary Survey), WILLIAM EMORY’S CARIC SEDGE. A facultative
heliophyte along margins of streams, rivers, lakes, ponds, marshes, and open swamps 250–
4,000 ft in elevation; in East TX mostly in the Blackland Prairie, but in the Post Oak Savannah,
and Montgomery and Walker cos. of the Pineywoods; also Cross Timbers and Prairies, Edwards
Plateau, Rolling Plains, ne corner of the South TX Plains, and El Paso Co. of the Trans-Pecos; sc
Canada and ne and c U.S. from NY s to VA w to WY and NM. Fruiting Mar–May. This species
provides some forage value to cattle. Section Phacocystis
Carex festucacea Schkuhr ex Willd., (fescue-like), FESCUE CARIC SEDGE. A plant that does well in
shade or full sun, in damp or wet low areas in woods or in open wet creek bottoms that fan out
into rush meadows; throughout most of East TX except for the sw part; also ne Gulf Prairies
and Marshes; se Canada (Ont.) and e U.S. w to MN and TX. Fruiting Apr–May(–early Jun). Section
Ovales