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

526 CYPERACEAE/CAREX
93. Plants cespitose, without elongate rhizomes.
94. Perigynia distichously arranged along the rachis.
95. Perigynia obovate to subglobose, rarely ovate-oblong, 1.6-
2.1 times as long as wide ____________________________ C. bulbostylis
95. Perigynia oblong-lanceolate, (2–)2.5–2.9 times as long as
wide ___________________________________________ C. planispicata
94. Perigynia spirally arranged along the rachis.
96. Shoot bases brown, often white above the brown.
97. Perigynia (4–)4.2–6 mm long; style base straight or
slightly bent; anthers 1.6–2 mm long _____________ C. flaccosperma
97. Perigynia 3.2–4.1 mm long; style base usually conspicuously
bent or reflexed; anthers 1.8–3.6 mm long ______ C. glaucodea
96. Shoot bases purplish-red.
98. Perigynia (1.8–)2–2.6 mm wide, orbicular to suborbicular
in transverse-section; achene bodies (excluding stipe)
2.2–3 mm long ____________________________________ C. grisea
98. Perigynia 1.5–2.4 mm wide, obtusely triangular in transverse-section;
achene bodies (excluding stipe) 1.8–2.3(–
2.4) mm long.
99. Apex of perigynia obtuse, blunt; perigynia 3.5–4.5
mm long, 1.8–2.3(–2.5) times longer than wide _____ C. corrugata
99. Apex of perigynia more or less pointed; perigynia
4.2–5.2 mm long, (2.2–)2.5–3.1 times longer than
wide _____________________________________ C. amphibola
Carex abscondita Mack., (concealed), HIDDEN-FRUIT CARIC SEDGE, THICKET CARIC SEDGE. A
sciophyte (= a plant adapted to grow in or tolerate heavy shade) of wet to mesic, shaded deciduous
hardwood forests, pine forests, or swamps; e part of the Red River drainage, extreme ne parts of
the Post Oak Savannah, and throughout the Pineywoods; also in the ne part of the Gulf Prairies
and Marshes; widespread in the e U.S. w to OK and TX. Fruiting Apr–Jun. Section Careyanae
Carex alata Torr., (winged), WINGED CARIC SEDGE, BROAD-WING CARIC SEDGE. Wet, open to partially
open sites with sandy soils, marshy and wooded pond margins, low open wet woods, and
less frequently along open wet roadside ditches; infrequent throughout the Pineywoods in
Anderson, Gregg, Hardin, Henderson, Jefferson, Leon, Trinity, and Wood cos.; also ne part of the
Gulf Prairies and Marshes; se Canada (Ont.) and widespread in the e U.S. w to OK and TX. Fruiting
Apr–Jun(–Sep). Section Ovales
Carex albicans Willd. ex Spreng. var. australis (L.H. Bailey) Rettig, (sp.: whitish; var.: southern),
SOUTHERN BELLOWS-BEAK CARIC SEDGE. Rhizomes long, horizontally spreading. Sandy or rocky
woods, frequently on slopes in mixed pine-hardwood forests; throughout the Pineywoods, infrequent
in the Post Oak Savannah from Freestone, Grimes, Walker, and Van Zandt cos., and infrequent
in the Blackland Prairie from Bell and Dallas cos.; also ne part of the Gulf Prairies and
Marshes; se U.S. from VA s to FL w to AR and TX. Fruiting Apr–Jun. [C. physorhyncha Liebm. ex
Steud.] Crins and Rettig (2002) reported Carex albicans var. albicans for TX. However, TX material
of Section Acrocystis does not bear this out. Variety albicans differs by having short, ascending
to erect rhizomes. Section Acrocystis
Carex albolutescens Schwein., (whitish yellow), WHITISH YELLOW CARIC SEDGE, GREEN-WHITE
CARIC SEDGE. Wet woods, thickets, and peats; infrequent in the n Post Oak Savannah and scattered
throughout the Pineywoods; also ne part of the Gulf Prairies and Marshes; widespread in
the e U.S. w to OK and TX. Fruiting Apr–Jun(–Aug). Section Ovales