Dichanthelium clandestinum
Dichanthelium boscii
deer-tongue grass, deer-tongue rosette-panicgrass, deertongue, panic clandestin
Bosc's panic grass, Bosc's rosette-panicgrass, panic de Bosc
50-140 cm, stout, pilose with papillose-based hairs to subglabrous;
fall phase branching from the mid- and upper culm nodes, with a few, nearly erect, elongate branches, sparsely rebranching, sheaths overlapping, concealing the secondary panicles;
nodes not swollen, glabrous or sparsely pubescent.
25-75 cm, initially erect, often sprawling in the fall, nodes densely retrorsely bearded;
internodes glabrous, or pilose with papillose-based hairs;
fall phase branching from the midculm nodes, branches nearly erect, sparsely rebranching, blades and secondary panicles only slightly reduced.
5-10;
sheaths not overlapping, striate-ribbed, narrowing above midlength, hispid to sparsely hirsute, hairs sometimes papillose-based, summits mottled with pale spots, margins ciliate, collars puberulent;
ligules 0.4-0.9 mm, membranous;
blades 10-25 cm long, 15-30 mm wide, flat, lanceolate, often rigid, glabrous or sparsely pubescent, with 9-13 major veins and 40-80 minor veins, bases cordate, with papillose-based cilia, apices acuminate.
4-6, often with a transitional leaf above the basal rosette;
sheaths not overlapping, bases puberulent to retrorsely pilose, margins ciliate, collars pubescent;
ligules 0.4-0.9 mm, membranous, ciliate, cilia longer than the membranous portion;
blades 3-6 times longer than wide, 15-40 mm wide, ovate-lanceolate, glabrous, puberulent, or pilose, with 11-15 major veins and 40-120 minor veins, bases cordate, margins with papillose-based cilia.
4-12 cm long, 4-12 cm wide, about as long as wide when fully expanded, partially included to tardily exserted, with 16-60 spikelets.
2.4-3.6 mm long, 1.2-1.5 mm wide, narrowly ellipsoid, sparsely pubescent.
3.8-5.2 mm long, 1.7-2.2 mm wide, narrowly ellipsoid, pubescent or puberulent.
1/3 – 1/2 as long as the spikelets, narrowly triangular;
upper glumes and lower florets slightly shorter than the spikelets, with 7 or 9 prominent veins;
lower florets sterile;
upper florets umbonate, apices with a minute tuft of hairs.
1/3 – 1/2 as long as the spikelets, narrowly triangular;
upper glumes shorter than the spikelets;
lower florets usually staminate;
upper florets pointed, with a minute tuft of hairs.
rosettes well-differentiated;
sheaths pubescent;
blades ovate to lanceolate.
rosettes well-differentiated;
sheaths pubescent;
blades ovate to lanceolate, dark green.
panicles 8-16 cm long, 4-12 mm wide, exserted, with many spikelets.
= 36.
= 18,36.
Dichanthelium clandestinum
Dichanthelium boscii
Dichanthelium clandestinum usually grows in semi-open areas in damp or sandy woodlands, thickets, or on banks. It is restricted to the eastern part of the Flora region. The primary panicles are open-pollinated for a brief period, and produced from late May to early July; the secondary panicles, which are cleistogamous and usually concealed within the sheaths, are produced from July through September.
Panicum recognitum Fernald refers to rare sterile hybrids with Dichanthelium dichotomum and perhaps D. scoparium; P. aculeatum Hitchc. & Chase to putative sterile hybrids with D. scabriusculum or D. dichotomum.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Dichanthelium boscii usually grows in semi-open areas in dry oak-hickory woods of the eastern United States. The primary panicles are open-pollinated and are produced from late April through June (and sometimes again in the fall); the secondary panicles are partly open-pollinated, and are produced from July through September.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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