Dichanthelium linearifolium
Dichanthelium scabriusculum
linear-leaf panicgrass, linear-leaf rosette-panicgrass, panic à feuilles linéaires, slim-leaf rosette grass, slimleaf panicgrass, slimleaf panicum
tall swamp rosette-panicgrass, tall-swamp panicgrass, woolly rosette grass
10-50 cm, very slender, erect to drooping, lower 3-8 internodes telescoped together, less than 2 cm, upper 2 internodes elongated;
nodes bearded;
internodes pubescent to almost glabrous;
fall phase developing a dense mass of erect blades and foreshortened branches arising from the basal nodes, terminating in small, narrow secondary panicles that are enclosed within the sheaths, with 6-15 spikelets.
70-150 cm, robust, purplish;
nodes glabrous or puberulent;
internodes scabridulous to almost glabrous;
fall phase branching from the mid- and upper culm nodes, developing numerous, well-separated, dense fascicles of many reduced blades and hidden secondary panicles.
2-4;
sheaths longer than the internodes, glabrous or pilose with dense, fine, papillose-based hairs;
ligules about 0.5 mm;
blades 5-20 cm long, 2-5 mm wide, stiffly ascending to erect, green to grayish-green, glabrous or densely pilose, apices long-tapering, lower blades shorter than the upper 2 or 3 blades.
6-14;
sheaths not overlapping, narrowing above midlength, sparsely to densely papillose-hispid, tops mottled with pale spots, margins ciliate, collars puberulent;
ligules 0.5-1.2 mm, membranous;
blades 12-25 cm long, 7-15 mm wide, linear, stiff, ascending to spreading, glabrous or sparsely pubescent, bases subcordate to constricted, margins scabridulous, apices long tapering, involute.
2-3.2 mm long, 0.8-1.4 mm wide, ellipsoid, not turgid, sparsely pubescent.
2.2-2.8 mm long, 1-1.2 mm wide, ovoid-ellipsoid, often purplish, glabrous, rarely sparsely puberulent.
0.6-1.1 mm, ovate-triangular;
upper glumes and lower lemmas exceeding the upper florets by about 0.2 mm before flowering, subequal in fruit, slightly pointed at maturity, upper florets 1.7-2.3 mm, ovoid-ellipsoid, minutely umbonate.
0.5-1 mm, acute;
upper glumes and lower florets exceeding the upper florets, prominently 7-9-veined;
lower florets sterile;
upper florets acute to acuminate, with a minute tuft of hairs at the apices.
rosettes poorly differentiated;
blades similar in shape to the lower cauline blades, narrow, ascending.
rosettes well-differentiated;
sheaths pubescent;
blades lanceolate.
panicles 4-10 cm long, 2-6 cm wide, long-exserted, with 12-70 spikelets;
branches and pedicels spreading.
panicles 10-21 cm long, 6-13 cm wide, eventually well-exserted, with many spikelets;
rachises and branches usually glabrous and mottled.
in large clumps, with rhizomes 3-5 mm thick.
= 18.
= 18.
Dichanthelium linearifolium
Dichanthelium scabriusculum
Dichanthelium linearifolium grows in dry, open woodlands, rock outcroppings, and sandy areas. It is restricted to the Flora region. The primary panicles are briefly open-pollinated, produced from May to early June; the secondary panicles are cleistogamous, produced from late June through July (rarely in fall). Plants in the northern United States and Canada tend to be shorter and more spreading, subglabrous, and to have spikelets 2-2.6 mm long; they have been called Panicum werneri Scribn., but do not merit taxonomic recognition. In the southwestern part of its range, especially in the Ozarks, most plants of D. linearifolium are tall, erect, densely pilose, with very elongated blades and spikelets often 2.6-3 mm long; they may hybridize with D. perlongum.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Dichanthelium scabriusculum usually grows in wet, sandy, open sites, including shores, stream banks, swamps, and bogs. It is restricted to the eastern United States. The primary panicles develop from May to July, the secondary panicles, which are usually concealed within the sheaths, from July through November. Panicum aculeatum Hitchc. & Chase refers to what appear to be sterile hybrids with Dichanthelium clandestinum or robust subspecies of D. dichotomum, P. bennettense W.V. Br. to hybrids with D. aciculare.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Go Botany
IL Wildflowers
KS Wildflowers
LA Plants
MD Biodiversity
MI Flora
MN Wildflowers
MO Plants
WildflowerSearch
iNaturalist
USDA Plants Database
