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Dallis grass, sticky heads

mudbank crowngrass, mudbank paspalum

Habit Plants perennial; cespitose, rhizomatous, rhizomes short (less than 1 cm), forming a knotty base. Plants perennial; rhizomatous.
Culms

50-175 cm, erect;

nodes glabrous.

10-50 cm, decumbent;

nodes glabrous or pubescent.

Sheaths

glabrous or pubescent, lower sheaths more frequently pubescent than the upper sheaths;

ligules 1.5-3.8 mm;

blades to 35 cm long, 2-16.5 mm wide, flat, mostly glabrous, adaxial surfaces with a few long hairs near the base.

glabrous;

ligules 2-2.5 mm;

blades to 12 cm long, 1.3-4.8 mm wide, flat.

Panicles

terminal, with 2-7 racemosely arranged branches;

branches 1.5-12 cm, racemose, divergent;

branch axes 0.7-1.4 mm wide, winged, glabrous, margins scabrous, terminating in a spikelet.

terminal, with 2-6 racemosely arranged branches;

branches 1.3-5.3 cm, diverging to erect, often arcuate, persistent;

branch axes 1.8-3 mm wide, broadly winged, usually conduplicate, glabrous, margins scabrous, terminating in a spikelet.

Spikelets

2.3-4 mm long, 1.7-2.5 mm wide, paired, appressed to the branch axes, ovate, tapering to an acute apex, stramineous (rarely purple).

1.7-2.1 mm long, 1.1-1.4 mm wide, solitary, appressed to the branch axes, elliptic to ovate, glabrous, stramineous.

Caryopses

2-2.3 mm, white to brown.

1-1.3 mm, white.

Lower

glumes absent;

upper glumes and lower lemmas 5-7-veined, margins pilose;

upper florets stramineous.

glumes absent;

upper glumes and lower lemmas 5-veined;

upper florets stramineous, lemmas glabrous throughout.

2n

= 20, 40, 50-63.

= 40, 60.

Paspalum dilatatum

Paspalum dissectum

Distribution
from FNA
AL; AR; AZ; CA; CO; DC; FL; GA; IL; KY; LA; MD; MO; MS; NC; NJ; NM; OK; OR; SC; TN; TX; VA; WV; HI; PR
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[BONAP county map]
from FNA
AL; AR; DC; DE; FL; GA; IL; KS; KY; LA; MD; MO; MS; NC; NJ; OK; SC; TN; TX; VA
[WildflowerSearch map]
[BONAP county map]
Discussion

Paspalum dilatatum is native to Brazil and Argentina. It is now well established in the Flora region, generally as a weed in waste places. It is also used as a turf grass.

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

Paspalum dissectum grows at the edges of lakes, ponds, rice fields, and wet roadside ditches. It is native to the eastern portion of the contiguous United States and to Cuba.

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

Source FNA vol. 25, p. 579. FNA vol. 25, p. 572.
Parent taxa Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum
Sibling taxa
P. acuminatum, P. almum, P. bifidum, P. blodgettii, P. boscianum, P. caespitosum, P. conjugatum, P. conspersum, P. convexum, P. coryphaeum, P. dissectum, P. distichum, P. fimbriatum, P. floridanum, P. hartwegianum, P. intermedium, P. laeve, P. langei, P. laxum, P. lividum, P. malacophyllum, P. minus, P. modestum, P. monostachyum, P. nicorae, P. notatum, P. paniculatum, P. pleostachyum, P. plicatulum, P. praecox, P. pubiflorum, P. quadrifarium, P. racemosum, P. repens, P. scrobiculatum, P. setaceum, P. unispicatum, P. urvillei, P. vaginatum, P. virgatum, P. virletii, P. wrightii
P. acuminatum, P. almum, P. bifidum, P. blodgettii, P. boscianum, P. caespitosum, P. conjugatum, P. conspersum, P. convexum, P. coryphaeum, P. dilatatum, P. distichum, P. fimbriatum, P. floridanum, P. hartwegianum, P. intermedium, P. laeve, P. langei, P. laxum, P. lividum, P. malacophyllum, P. minus, P. modestum, P. monostachyum, P. nicorae, P. notatum, P. paniculatum, P. pleostachyum, P. plicatulum, P. praecox, P. pubiflorum, P. quadrifarium, P. racemosum, P. repens, P. scrobiculatum, P. setaceum, P. unispicatum, P. urvillei, P. vaginatum, P. virgatum, P. virletii, P. wrightii
Name authority Poir. (L.) L.
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