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Lehmann lovegrass, Lehmann's love grass

six-weeks love grass

Habit Plants perennial; cespitose, forming innovations at the basal nodes, without glands. Plants annual; tufted, without innovations.
Culms

(20)40-80 cm, erect, commonly geniculate, sometimes rooting at the lower nodes, glabrous, lower portions sometimes scabridulous.

(2)6-25 cm, usually erect, sometimes decumbent, glabrous, with elliptical, yellowish, glandular pits below the nodes.

Sheaths

sometimes shortly silky pilose basally, hairs less than 2 mm, apices sparsely hairy, hairs to 3 mm;

ligules 0.3-0.5 mm, ciliate;

blades 2-12 cm long, 1-3 mm wide, flat to involute, glabrous, abaxial surfaces sometimes scabridulous, adaxial surfaces scabridulous.

with elliptical glandular pits, sparsely hairy at the throat, hairs to 2 mm;

ligules 0.2-0.5 mm, ciliate;

blades 2-12 cm long, 1-3 mm wide, flat to involute, abaxial surfaces scabridulous, bases with glandular pits.

Panicles

7-18 cm long, 2-8 cm wide, oblong, open;

primary branches 1-8 cm, appressed or diverging to 40° from the rachises;

pulvini glabrous;

pedicels 0.5-4 mm, diverging or appressed, flexible.

terminal, 4-10(15) cm long, 0.5-2 cm wide, narrowly elliptic, contracted, dense;

primary branches alternate, usually appressed, occasionally diverging to 30° from the rachises, rachises and branches with glandular pits;

pulvini glabrous;

pedicels 1.4-10 mm, appressed or divergent.

Spikelets

5-12(14) mm long, 0.8-1.2 mm wide, linear-lanceolate, plumbeous to stramineous, with 4-12(14) florets;

disarticulation irregular to basipetal, paleas usually persistent.

3.6-7.5 mm long, 1.2-2 mm wide, narrowly ovate, light yellowish, occasionally mottled with reddish-purple, with 6-11(14) florets;

disarticulation acropetal, paleas persistent.

Glumes

oblong to lanceolate, membranous;

lower glumes 1-1.5 mm;

upper glumes 1.3-2 mm;

lemmas 1.5-1.7 mm, ovate, membranous, lateral veins inconspicuous, apices acute to obtuse;

paleas 1.4-1.7 mm, obtuse;

anthers 3, 0.6-0.9 mm, yellowish.

subequal, ovate to lanceolate, hyaline;

lower glumes (0.7)0.9-1.4 mm;

upper glumes 1.2-1.8 mm;

lemmas 1.5-2.2 mm, ovate, subhyaline, stramineous, veins greenish and conspicuous, apices acute;

paleas 1.2-2 mm, hyaline, keels scabridulous, apices obtuse;

anthers 3, 0.2-0.3 mm, purplish.

Caryopses

0.6-0.8 mm, ellipsoid to obovoid, dorsally compressed, sometimes with a shallow adaxial groove, smooth, translucent, mostly light brown, embryo region dark brown with a greenish ring.

0.5-0.8 mm, pyriform except slightly flattened adaxially, smooth, light brown.

2n

= 40, 60.

= unknown.

Eragrostis lehmanniana

Eragrostis lutescens

Distribution
from FNA
AZ; CA; NM; OK; TX; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; CO; ID; NM; NV; OR; WA
[BONAP county map]
Discussion

Eragrostis lehmanniana is native to southern Africa, where it grows in sandy, savannah habitats. It was introduced for erosion control in the southern United States, where it often displaces native species. In the Flora region, it grows in sandy flats, along roadsides, on calcareous slopes, and in disturbed areas, at 200-1830 m. It is commonly found in association with Larrea tridentata, Opuntia, Quercus, Juniperus, and Bouteloua gracilis.

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

Eragrostis lutescens grows on the sandy banks of streams and lakes and in moist alkaline flats of the western United States at 300-2000 m. It has not been reported from Mexico.

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

Source FNA vol. 25, p. 76. FNA vol. 25, p. 79.
Parent taxa Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eragrostis Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eragrostis
Sibling taxa
E. airoides, E. amabilis, E. atrovirens, E. bahiensis, E. barrelieri, E. capillaris, E. cilianensis, E. ciliaris, E. cumingii, E. curtipedicellata, E. curvula, E. cylindriflora, E. echinochloidea, E. elliottii, E. elongata, E. erosa, E. frankii, E. gangetica, E. hirsuta, E. hypnoides, E. intermedia, E. japonica, E. lugens, E. lutescens, E. mexicana, E. minor, E. obtusiflora, E. palmeri, E. pectinacea, E. pilosa, E. plana, E. polytricha, E. prolifera, E. refracta, E. reptans, E. scaligera, E. secundiflora, E. sessilispica, E. setifolia, E. silveana, E. spectabilis, E. spicata, E. superba, E. swallenii, E. tef, E. trichodes, E. trichophora, E. unioloides
E. airoides, E. amabilis, E. atrovirens, E. bahiensis, E. barrelieri, E. capillaris, E. cilianensis, E. ciliaris, E. cumingii, E. curtipedicellata, E. curvula, E. cylindriflora, E. echinochloidea, E. elliottii, E. elongata, E. erosa, E. frankii, E. gangetica, E. hirsuta, E. hypnoides, E. intermedia, E. japonica, E. lehmanniana, E. lugens, E. mexicana, E. minor, E. obtusiflora, E. palmeri, E. pectinacea, E. pilosa, E. plana, E. polytricha, E. prolifera, E. refracta, E. reptans, E. scaligera, E. secundiflora, E. sessilispica, E. setifolia, E. silveana, E. spectabilis, E. spicata, E. superba, E. swallenii, E. tef, E. trichodes, E. trichophora, E. unioloides
Name authority Nees Scribn.
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