Eustachys retusa |
Eustachys petraea |
|
---|---|---|
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 |
FL; GA; NJ; NY; SC; TX |
AL; FL; GA; LA; MS; NC; PA; SC; TX; HI; PR; Virgin Islands
|
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 | ||
Sibling taxa | ||
Synonyms | Chloris argentina | Chloris petraea |
Name authority | (Lag.) Kunth | (Sw.) Desv. |
Web links |