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

550 CYPERACEAE/CAREX
Carex planispicata Naczi, (plane-spiked), SINGLE-PLANE CARIC SEDGE. A facultative sciophyte in
mesic deciduous forests, upper parts of floodplains and adjacent slopes, on acid loams, silt
loams, and sandy loams; mainly s Pineywoods and n Post Oak Savannah; e U.S. from PA s to GA
w to IL, OK, and TX. Fruiting Apr–May. In our area this species frequently grows with Carex
abscondita. Section Griseae
Carex planostachys Kunze, (flat-spiked), CEDAR CARIC SEDGE. A plant that grows in the shade of
junipers, oaks, various shrub spp., or taller herbaceous plants but also does well when exposed
to some full sun, in dry oak-juniper areas or scrub on calcareous soils; mainly on the w edge of
the Blackland Prairie, and c part of the Post Oak Savannah southeastward, extending e to
Grimes Co.; also Cross Timbers and Prairies, Edwards Plateau, Trans-Pecos, King Co. in the Rolling
Plains, n part of the South TX Plains, and the Coastal Bend area of the Gulf Prairies and
Marshes; AR, OK, and TX. Fruiting Mar–May. Section Halleranae
Carex reniformis (L.H. Bailey) Small, (kidney-shaped), KIDNEY-SHAPE CARIC SEDGE. A facultative
sciophyte in low wet woods, sloughs, and less frequently in marshes; widespread in the
Pineywoods, the c part of the Post Oak Savannah northward, and the Red River drainage; also
Tarrant Co. in the e part of the Cross Timbers and Prairies and the ne part of the Gulf Prairies
and Marshes; se U.S. from VA s to FL w to IL, OK, and TX. Fruiting May–Jun. Section Ovales
Carex retroflexa Muhl. ex Willd., (bent backward), REFLEXED-FRUIT CARIC SEDGE. A facultative
sciophyte in dry rocky or sandy woods, thickets, and forest edges but sometimes persisting in
openings exposed to full sun along fence rows and cleared areas; throughout most of East TX;
also Cross Timbers and Prairies, e edge of the Edwards Plateau, and the ne part of the Gulf Prairies
and Marshes; se Canada (Ont.) and widespread in e U.S. w to IL, KS, and TX. Fruiting late
Mar–May(–Jun). Section Phaestoglochin
Carex rosea Schkuhr ex Willd., (rose-like), STELLATE CARIC SEDGE, ROSY SEDGE. A facultative
sciophyte in rich deciduous woods, frequently associated with Podophyllum (may-apple);
Anderson, Hardin, Harris, Rusk, Sabine, and San Augustine cos., but probably throughout the
Pineywoods, the e edge of the Red River drainage, possibly the n counties of the Post Oak Savannah,
and the ne Gulf Prairies and Marshes; se Canada and widespread in e 1/2 of U.S., also WY.
Fruiting late Apr–Jun(–early Jul). This species is easily overlooked and infrequently collected.
Section Phaestoglochin
Carex shinnersii P. Rothr. & Reznicek, (for Lloyd Herbert Shinners, 1918–1971, author of Spring
Flora of the Dallas-Fort Worth Area Texas and founder of the botanical journal Sida, Contributions
to Botany), LLOYD SHINNERS’ CARIC SEDGE. A facultative heliophyte in open wet swales and
bottoms, depressions, or wet roadside ditches or ones with ephemeral water, usually on sandy
soils; Delta, Kaufman, Lamar, and Red River cos. in the n part of East TX and undoubtedly in
many other counties of East TX; also Tarrant Co. in the Cross Timbers and Prairies; AR, KS, OK,
and TX. Fruiting May–Jun. This species was only recently described (Rothrock & Reznicek
2001). Section Ovales
Carex socialis Mohlenbr. & Schwegman, (companionable or sociable), COMPANION CARIC SEDGE,
LOW WOODLAND CARIC SEDGE. A facultative sciophyte in clay or sandy clay soils of secondary
terraces of river floodplains, frequently associated with C. hyalina, mostly along the floodplains
of the Trinity and Sulphur rivers in the Blackland Prairie, Post Oak Savannah, Red River
drainage, and Pineywoods; se U.S. from NC s to GA w to IL, OK, and TX. Fruiting late Mar–May.
Section Phaestoglochin
Carex striatula Michx., (with fine longitudinal lines), FINE-LINE CARIC SEDGE, LINED CARIC SEDGE.
A facultative sciophyte, frequently on upper slopes of ravines in partial openings of deciduous
forests; mainly in the Pineywoods and one collection from Dallas Co. in the Blackland Prairie,
absent from the sw and nw parts of East TX; e U.S. from NY s to FL w to AR and TX. Fruiting