Flora of North America species comparison

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Dichanthelium leibergii

Dichanthelium sect. Macrocarpa

Leiberg's panicum, Leiberg's rosette grass, leibergs panicgrass
Habit Plants cespitose, with knotty rhizomes no more than 2 mm thick. Plants cespitose, often with knotty rhizomes, sometimes with caudices.
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.

20-110 cm, ascending to erect;

fall phase sparsely rebranching, not producing dense axillary fascicles.
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.

3-6;

sheaths glabrous or pubescent, not viscid;

ligules shortly membranous and ciliate, cilia longer than the membranous portion.
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.

narrowly ellipsoid to obovoid, pubescent to puberulent, sometimes sparsely so, hairs sometimes papillose-based.
Lower glumes

about 1.8 mm, narrowly triangular;

lower florets staminate;

upper florets mucronate.

Basal

rosettes well-differentiated;

blades few, small, ovate to lanceolate.

rosettes usually well-differentiated.
Primary

panicles at least partially exserted.
Upper

florets pointed, umbonate, mucronate, or apiculate.
2n

= 18.

Dichanthelium leibergii

Dichanthelium sect. Macrocarpa
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]
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.)
Source FNA vol. 25, p. 416. FNA vol. 25, p. 412.
Parent taxa Poaceae > subfam. Panicoideae > tribe Paniceae > Dichanthelium > sect. Macrocarpa Poaceae > subfam. Panicoideae > tribe Paniceae > Dichanthelium
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
Subordinate taxa
Synonyms Panicum leibergii
Name authority (Vasey) Freckmann Freckmann & Lelong
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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