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Commelina communis L.
ASIATIC DAYFLOWER
Common dayflower; Light-blue

Life   Plantae   Monocotyledoneae   Commelinaceae   Commelina

Commelina communis
© Copyright Bobby Hattaway 2011 · 5
Commelina communis

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Commelina communis
© Copyright Bobby Hattaway 2011 · 5
Commelina communis
Commelina communis
© Copyright Bobby Hattaway 2011 · 5
Commelina communis

Commelina communis
© Copyright Bobby Hattaway 2011 · 5
Commelina communis
Commelina communis
© Copyright Bobby Hattaway 2011 · 5
Commelina communis

Commelina communis
© Les Mehrhoff, 2008-2010 · 4
Commelina communis
Commelina communis
© Les Mehrhoff, 2008-2010 · 4
Commelina communis

Commelina communis, inflorescence - frontal view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Commelina communis, inflorescence - frontal view of flower
Commelina communis, inflorescence - lateral view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Commelina communis, inflorescence - lateral view of flower

Commelina communis, leaf - basal or on lower stem
© Copyright Steve Baskauf, 2002-2011 · 4
Commelina communis, leaf - basal or on lower stem
Commelina communis, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Commelina communis, stem - showing leaf bases

Commelina communis, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Commelina communis, whole plant - in flower - general view
Commelina communis, pollen
© Copyright UDEL Pollen 2014 · 1
Commelina communis, pollen

Commelina communis
© Copyright Lucy Beeching 2010 · 1
Commelina communis
Commelina communis
© Copyright Lucy Beeching 2010 · 1
Commelina communis

Associates · map
FamilyScientific name @ source (records)
Botryosphaeriaceae  Macrophoma commelinae @ BPI (2)
Halictidae  Halictus ligatus @ AMNH_BEE (1)
Miridae  Goodeniaphila cassisi @ AMNH_PBI (1)

Pycnoderes medius @ NCSU (10)
Pucciniaceae  Uromyces commelinae @ BPI (14)
Tilletiaceae  Tilletia commelinae @ BPI (4)
Ustilaginaceae  Ustilago commelinae @ BPI (6)
_  Uredo miyoshiana @ BPI (1)

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FNA Vol. 22 Page 193 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 22 | Commelinaceae | Commelina

2. Commelina communis Linnaeus, Sp. Pl. 1: 40. 1753.

Asiatic dayflower, comméline commune

Herbs, annual, erect to decumbent. Roots at proximal nodes. Stems diffusely branched. Leaves: blade narrowly lanceolate to ovate-elliptic, 5--12 ´ 1--4 cm, apex acute to acuminate. Inflorescences: distal cyme usually vestigial, included, sometimes 1-flowered, exserted; spathes solitary, green, paler or whitish basally with contrasting, dark green veins, pedunculate, usually not falcate, 1.5--3(--3.5) ´ 0.8--1.3(--1.8) cm, margins distinct, scabrous, not ciliate, apex acute to acuminate, glabrous to puberulent; peduncles 0.8--3.5(--5) cm. Flowers bisexual (rarely staminate); proximal petal paler or white, very reduced, distal petals blue to bluish purple; staminodes 3; antherodes yellow sometimes with central maroon spot, cruciform. Capsules 2-locular, 2-valved, 4.5--8 mm. Seeds 4, brown, (2--)2.5--4.2 ´ 2.2--3 mm, rugose pitted-reticulate.

Flowering summer--fall. Weedy and waste places; edges of fields, woods, and marshes, often in thick herbaceous vegetation; occasionally in woods; introduced; Ont., Que.; Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Va., W.Va., Wis.; native, Asia.

Commelina communis var. ludens (Miquel) C. B. Clarke is distinguished by its darker flowers, antherodes with maroon centers (instead of entirely yellow), distalmost cyme less well developed and usually not producing a flower, and spathes proportionally broader. I have not found it possible to separate this regularly from C. communis var. communis, which also occurs in the flora. A variegated form of C. communis var. ludens, forma aureostriata MacKeever, occurs spontaneously and has been noted from Arkansas, Kentucky, Louisiana, Maryland, North Carolina, Texas, and Virginia.

SELECTED REFERENCES

Pennell, F. W. 1937. Commelina communis in the eastern United States. Bartonia 19: 19--22. Pennell, F. W. 1938. What is Commelina communis? Proc. Acad. Nat. Sci. Philadelphia 90: 31--39.

Updated: 2024-05-24 16:09:54 gmt
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