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Dallis grass, sticky heads

comb's crowngrass, comb's paspalum

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

50-175 cm, erect;

nodes glabrous.

10-50 cm, erect.

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 or sparsely pubescent;

ligules 0.5-2 mm;

blades to 20 cm long, 1.5-3.8 mm wide, flat, pubescent.

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, usually composed of a digitate pair of branches, 1-5 additional branches sometimes present below;

branches 1.8-7.1 cm, diverging to erect;

branch axes 0.8-1.3 mm wide, winged, 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).

3-3.6 mm long, 1.3-1.8 mm wide, solitary (rarely paired), appressed to the branch axes, elliptic, glabrous, apices acute to acuminate.

Caryopses

2-2.3 mm, white to brown.

Lower

glumes absent;

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

upper florets stramineous.

glumes absent;

upper glumes and lower lemmas glabrous, 5-veined, margins flat;

upper florets stramineous to golden brown.

2n

= 20, 40, 50-63.

= 12, 24, 36.

Paspalum dilatatum

Paspalum almum

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
[WildflowerSearch map]
[BONAP county map]
from FNA
LA; TX
[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 almum was probably introduced to North America as a forage species. Its native range is Brazil, Paraguay, Uruguay, and eastern Argentina. It has not been reported from Mexico or Central America. In the Flora region, it is found along roadsides and in pastures of southeastern Texas and southern Louisiana.

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

Source FNA vol. 25, p. 579. FNA vol. 25, p. 575.
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. 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. racemosum, P. repens, P. scrobiculatum, P. setaceum, P. unispicatum, P. urvillei, P. vaginatum, P. virgatum, P. virletii, P. wrightii
Name authority Poir. Chase
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