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Dallis grass, sticky heads

Peruvian paspalum

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

50-175 cm, erect;

nodes glabrous.

40-90 cm, erect;

nodes purple.

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 0.1-0.3 mm;

blades 4-13 cm long, 10-22 mm wide, flat, glabrous.

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 40-75 racemosely arranged branches;

branches 1-2.5 cm, divergent to erect;

branch axes 1-1.5 mm wide, terminating in a pedicellate 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).

2.5-2.9 mm long, 0.8-1.2 mm wide, paired, appressed to or divergent from the branch axes, linear-elliptic, pubescent, stramineous or purplish.

Caryopses

2-2.3 mm, white to brown.

white.

Lower

glumes absent;

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

upper florets stramineous.

glumes absent;

upper glumes and lower lemmas rugose, shortly ciliate;

lower lemmas lacking ribs over the veins;

upper florets 1.3-1.6 mm, stramineous, oblong elliptic, pale, shiny.

2n

= 20, 40, 50-63.

= unknown.

Paspalum dilatatum

Paspalum racemosum

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
CO; KS; MS; ON
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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 racemosum is native to Colombia, Ecuador, and Peru. Within the Flora region, it is known from disturbed sites at a few widely scattered locations.

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

Source FNA vol. 25, p. 579. FNA vol. 25.
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. 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. repens, P. scrobiculatum, P. setaceum, P. unispicatum, P. urvillei, P. vaginatum, P. virgatum, P. virletii, P. wrightii
Name authority Poir. Lam.
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