Flora of North America species comparison

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Dichanthelium leibergii

Dichanthelium pedicellatum

Leiberg's panicum, Leiberg's rosette grass, leibergs panicgrass

cedar rosette grass, corm-based panicgrass
Habit Plants cespitose, with knotty rhizomes no more than 2 mm thick. Plants cespitose, not rhizoma-tous.
Culms

24-80 cm, glabrous or puberulent;

nodes sparsely, spreading-pilose;

internodes mostly elongated, glabrous or puberulent;

fall phase with a few suberect branches from the lower and midculm nodes, blades slightly reduced, secondary panicles partially exserted.

20-70 cm, initially erect, with hard, cormlike bases;

nodes puberulent to sparsely hirsute;

internodes all elongated, puberulent to hirsute;

fall phase with decumbent culms, developing divaricate branches from the midculm nodes before the primary panicles mature.
Cauline leaves

3-4;

sheaths not overlapping, with ascending papillose-based hairs;

ligules 0.3-0.5 mm, membranous, ciliate, cilia longer than the membranous portion;

blades 5-15 cm long, 7-13 mm wide, ascending to erect, sparsely to densely pubescent with papillose-based hairs, with 9-11 prominent major veins and 25-50 minor veins, bases truncate to cordate, margins with papillose-based cilia.

4-7;

sheaths sometimes overlapping, puberulent to papillose-hispid, margins ciliate;

ligules 0.3-1 mm, membranous and ciliate;

blades 3-12 cm long, 2-8 mm wide, widening distal to the rounded or subcordate bases, thin, glabrous or sparsely hirsute, margins with papillose-based cilia.
Panicles

6-10 cm long, 3-5 cm wide, their length usually less than twice their width, eventually well-exserted, with 20-40 spikelets;

branches spreading to ascending.

Spikelets

3.3-3.8 mm long, 1.6-2 mm wide, ellipsoid-obovoid, turgid, pubescent, hairs papillose-based, apices rounded.

3.2-4.4 mm long, 1.3-1.6 mm wide, narrowly obovoid-ellipsoid, papillose-hirsute, attenuate to the purplish bases.
Lower glumes

about 1.8 mm, narrowly triangular;

lower florets staminate;

upper florets mucronate.

about 1/2 as long as the spikelets, narrowly triangular, subadjacent to the upper glumes, not encircling the pedicels;

upper glumes about 0.3 mm shorter than the upper florets;

lower florets sterile;

upper florets with pointed, minutely puberulent apices.
Basal

rosettes well-differentiated;

blades few, small, ovate to lanceolate.

rosettes absent.
Primary

panicles 3-6 cm long, 2-4 cm wide, exserted;

branches spreading at maturity;

pedicels somewhat divergent.
2n

= 18.

= 18.

Dichanthelium leibergii

Dichanthelium pedicellatum
Distribution
from FNA
IA; IL; IN; KS; MI; MN; MO; ND; NE; NY; OH; PA; SD; WI; AB; MB; ON; SK
[WildflowerSearch map]
[BONAP county map]
from FNA
TX
[BONAP county map]
Discussion

Dichanthelium leibergii grows primarily on prairie relics, but is occasionally found in sandy woodlands. It is restricted to the Flora region. The primary panicles are produced from mid-May through July, the secondary panicles from late June to September. Sterile putative hybrids with D. acuminatum and D. xantho-physum are occasionally found.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Dichanthelium pedicellatum grows on limestone outcroppings and in dry, open oak woodlands. Its range extends from Texas into Mexico and Guatemala. Primary panicles develop from late March into June (and sometimes from late August to November) and are open-pollinated; secondary panicles develop from May into fall and are at least partly cleistogamous.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 25, p. 416. FNA vol. 25, p. 410.
Parent taxa Poaceae > subfam. Panicoideae > tribe Paniceae > Dichanthelium > sect. Macrocarpa Poaceae > subfam. Panicoideae > tribe Paniceae > Dichanthelium > sect. Pedicellata
Sibling taxa
D. aciculare, D. acuminatum, D. boreale, D. boscii, D. chamaelonche, D. clandestinum, D. commutatum, D. consanguineum, D. depauperatum, D. dichotomum, D. ensifolium, D. erectifolium, D. latifolium, D. laxiflorum, D. linearifolium, D. malacophyllum, D. nodatum, D. nudicaule, D. oligosanthes, D. ovale, D. pedicellatum, D. perlongum, D. polyanthes, D. portoricense, D. ravenelii, D. scabriusculum, D. scoparium, D. sphaerocarpon, D. strigosum, D. tenue, D. wilcoxianum, D. wrightianum, D. ×anthophysum
D. aciculare, D. acuminatum, D. boreale, D. boscii, D. chamaelonche, D. clandestinum, D. commutatum, D. consanguineum, D. depauperatum, D. dichotomum, D. ensifolium, D. erectifolium, D. latifolium, D. laxiflorum, D. leibergii, D. linearifolium, D. malacophyllum, D. nodatum, D. nudicaule, D. oligosanthes, D. ovale, D. perlongum, D. polyanthes, D. portoricense, D. ravenelii, D. scabriusculum, D. scoparium, D. sphaerocarpon, D. strigosum, D. tenue, D. wilcoxianum, D. wrightianum, D. ×anthophysum
Synonyms Panicum leibergii Panicum pedicellatum
Name authority (Vasey) Freckmann (Vasey) Gould
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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