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swollen fingergrass, swollen windmill-grass

Paraguayan windmill-grass

Habit Plants annual. Plants perennial; cespitose.
Culms

15-95 cm, erect or decumbent and rooting at the lower nodes.

to 100 cm, erect.

Sheaths

glabrous;

ligules 0.3-0.5 mm, erose to lacerate;

blades to 15 cm long, 0.3-0.6 mm wide, with basal hairs, otherwise usually glabrous.

glabrous;

ligules about 0.5 mm, membranous, erose;

blades to 25 cm long, 1-6 mm wide, flat or involute, sometimes appearing filiform, bases with hairs to 7 mm.

Panicles

digitate, with 7-15 evidently distinct branches;

branches 3-8 cm, more or less erect, averaging 14 spikelets per cm.

digitate, with 2-9 evidently separate branches;

branches 3-14 cm, erect to curving, averaging 11 spikelets per cm.

Spikelets

with 1 bisexual and 2(3) sterile florets.

strongly imbricate, light to medium brown, with 2(3) sterile florets.

Lower glumes

1.2-2.1 mm;

upper glumes 2.3-2.7 mm;

lowest lemmas 2-2.7 mm, ovate to elliptic, calluses and distal portion of the margins pilose, hairs to 1 mm, keels glabrous or pilose, apices awned, awns 4-7.7 mm;

second florets 0.9-1.3 mm long, 0.4-0.9 mm wide, slightly to strongly widened distally, inflated, usually glabrous, truncate, awned, awns 5-7 mm;

third florets obovoid to subspherical, smaller than the first, strongly inflated.

1.6-2.4 mm;

upper glumes 2.3-3.8 mm;

lowest lemmas 2.7-4.2 mm long, 0.6-1.1 mm wide, marginal veins and keels densely and conspicuously hairy, hairs 1.5-3 mm, awns 2.4-5.5 mm;

second florets 1.1-1.8 mm, about 1/2 as wide as long, conspicuously widened distally, laterally compressed, glabrous, truncate, awned, awns 1.5-3.5 mm;

distal sterile floret(s) similar but smaller, longer than the subtending rachilla segments, unawned.

Caryopses

1.1-1.4 mm.

1.3-2 mm long, 0.8-0.9 mm wide, ovoid-ellipsoid.

2n

= 20, 40, ca. 50.

Chloris barbata

Chloris canterae

Distribution
from FNA
FL; LA; SC; TX; HI; PR; Virgin Islands
[BONAP county map]
[BONAP county map]
Discussion

Chloris barbata grows in subtropical and tropical coastal regions on loams, limestone-derived soils, and along beaches. The main portion of its range lies to the south of the Flora region, through the Caribbean and the east coast of Mexico, Central America, and South America. It is a weedy species, often growing in waste areas, but also in cultivated fields.

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

Chloris canterae is native to South America. Both of its varieties are found in the coastal plain of Texas and Louisiana. In South America, they are essentially sympatric, but occupy different habitats.

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

Key
1. Leaves primarily cauline, 2.5-6 mm wide, flat; panicle branches 4-14 cm long
var. canterae
1. Leaves primarily basal, 1-1.5 mm wide, involute; panicle branches 3-6 cm long
var. grandiflora
Source FNA vol. 25, p. 208. FNA vol. 25, p. 208.
Parent taxa Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Chloris Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Chloris
Sibling taxa
C. andropogonoides, C. berroi, C. canterae, C. ciliata, C. cucullata, C. divaricata, C. elata, C. gayana, C. pectinata, C. pilosa, C. radiata, C. submutica, C. texensis, C. truncata, C. ventricosa, C. verticillata, C. virgata
C. andropogonoides, C. barbata, C. berroi, C. ciliata, C. cucullata, C. divaricata, C. elata, C. gayana, C. pectinata, C. pilosa, C. radiata, C. submutica, C. texensis, C. truncata, C. ventricosa, C. verticillata, C. virgata
Subordinate taxa
C. canterae var. canterae, C. canterae var. grandiflora
Synonyms C. inflata
Name authority Sw. Arechav.
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