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Argentine fingergrass

pinewoods fingergrass

Culms

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

20-100 cm, erect, or decumbent and rooting at the nodes.

Blades

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

(2)5-8(26) cm long, 4-10 mm wide, folded, apices obtuse.

Panicles

with (6)8-15 branches;

branches 4-10 cm, straight, somewhat stiff.

with (1)4-6(11) branches;

branches 2-11.5 cm.

Spikelets

1.5-2.1 mm;

florets 2.

1.5-2.1 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.

1-1.7 mm, apices acute;

upper glumes 1.5-1.8 mm, obovate, bilobed, lobes acute or obtuse, awned from between the lobes, awns 0.3-0.9 mm;

calluses glabrous or with a few hairs, hairs to 0.3 mm;

lowest lemmas 1.5-2 mm, ovate, dark brown at maturity, lateral veins and keels with appressed, brown hairs, hairs to 0.4 mm, apices mucronate;

second lemmas about 1 mm, broadly cuneate, occasionally mucronate, apices rounded or truncate.

Caryopses

about 1 mm.

1-1.2 mm.

2n

= 40.

= 40.

Eustachys retusa

Eustachys petraea

Distribution
from FNA
FL; GA; NJ; NY; SC; TX
[BONAP county map]
from FNA
AL; FL; GA; LA; MS; NC; PA; SC; TX; HI; PR; Virgin Islands
[WildflowerSearch map]
[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 petraea grows on dunes and open sandy areas and along roadsides and salt and brackish marshes. Its range extends south from the United States through Mexico to Panama.

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

Source FNA vol. 25, p. 222. FNA vol. 25, p. 220.
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. neglecta, E. retusa
Synonyms Chloris argentina Chloris petraea
Name authority (Lag.) Kunth (Sw.) Desv.
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