The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Argentine fingergrass

four-spike fingergrass

Culms

30-80 cm, erect, or decumbent and rooting at the nodes.

45-90(120) cm, erect.

Blades

6-12 cm long, 5-10 mm wide, usually folded, apices obtuse.

to 21 cm long, to 8 mm wide, acute, occasionally scabridulous basally.

Panicles

with (6)8-15 branches;

branches 4-10 cm, straight, somewhat stiff.

with (3)4-9 branches;

branches 3.3-15.5 cm.

Spikelets

1.5-2.1 mm;

florets 2.

2.6-3 mm;

florets 2-3.

Lower glumes

1.1-1.3 mm, linear-lanceolate, acute;

upper glumes 1.3-1.5 mm, oblanceolate, apices truncate or bilobed, mucronate, mucros to 0.4 mm;

calluses with a few short hairs;

lowest lemmas 1.7-2 mm, lanceolate to ovate, not strongly keeled, midveins glabrous, lateral veins with widely spreading, white, 1-2 mm hairs, apices acute to mucronate;

second lemmas 1.1-1.2 mm, broadly cuneate, apices truncate.

to 2.2 mm, apices obtuse or bifid;

upper glumes 2.2-2.8 mm, narrowly oblong, apices bilobed, lobes usually acute, occasionally truncate, awned from between the lobes, awns 0.5-1.8 mm;

calluses with a few hairs, hairs to 0.6 mm;

lowest lemmas 2.3-3 mm, ovate, medium to dark brown at maturity, lateral veins and keels with slightly spreading, golden to tawny hairs, hairs to 0.7 mm, apices acute, awned, awns 0.7-1.2 mm;

second lemmas 1.4-2.1 mm, obovate to oblanceolate, apices truncate, awned, awns 0.5-0.8 mm.

Caryopses

about 1 mm.

about 1.5 mm.

2n

= 40.

= unknown.

Eustachys retusa

Eustachys neglecta

Distribution
from FNA
FL; GA; NJ; NY; SC; TX
[BONAP county map]
from FNA
AL; FL
[BONAP county map]
Discussion

Eustachys retusa is native to South America, but it is now established along roadsides, sandy fields, and waste areas in the southeastern United States.

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

Eustachys neglecta grows in sandy fields, roadsides, and pinelands. It is endemic to the southeastern United States.

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

Source FNA vol. 25, p. 222. FNA vol. 25, p. 222.
Parent taxa Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eustachys Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eustachys
Sibling taxa
E. caribaea, E. distichophylla, E. floridana, E. glauca, E. neglecta, E. petraea
E. caribaea, E. distichophylla, E. floridana, E. glauca, E. petraea, E. retusa
Synonyms Chloris argentina
Name authority (Lag.) Kunth (Nash) Nash
Web links