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Iris versicolor L.
HARLEQUIN BLUEFLAG
Purple Iris; Northern Blue Flag; Harlequin Blue Flag

Life   Plantae   Monocotyledoneae   Iridaceae   Iris

Iris versicolor, Blue flag Iris, Howard County, MD, Helen Lowe Metzman ---.
© Copyright source/photographer · 5
Iris versicolor, Blue flag Iris, Howard County, MD, Helen Lowe Metzman ---.

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Associates · map
FamilyScientific name @ source (records)
Andrenidae  Andrena wilkella @ CUIC_ENT (1)
Botryosphaeriaceae  Diplodia @ BPI (1)

Phyllosticta iridis @ BPI (13)
Dermateaceae  Mollisia iridis @ BPI (5)
Halictidae  Agapostemon splendens @ UCMS_ENT (1)

Agapostemon virescens @ CUIC_ENT (4)

Lasioglossum foxii @ CUIC_ENT (1)

Lasioglossum pilosum @ UCMS_ENT (1)
Megachilidae  Megachile latimanus @ UCMS_ENT (1)
Mycosphaerellaceae  Didymella iridis @ BPI (1)

Heterosporium echinulatum @ BPI (1)

Heterosporium gracile @ BPI (10)

Septoria densiuscula @ BPI (1)
Pleosporaceae  Alternaria iridis @ BPI (1)
Pucciniaceae  Puccinia iridis @ BPI (119)

Puccinia majanthae @ BPI (1)

Puccinia sessilis @ BPI (20)
Turritellidae  Vermicularia liliacearum @ BPI (1)
Valsaceae  Asteroma venulosum @ BPI (1)
Xylariaceae  Sphaeria iridis @ BPI (1)
_  Didymellina macrospora @ BPI (1)

Didymellina poecilospora @ BPI (1)

Uredo iridicola @ BPI (12)

Uredo iridis @ BPI (1)

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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=IRVE2 ---> https://plants.usda.gov/java/profile?symbol=IRVE2
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Following modified from Flora of North America
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Link to Flora of North America home
 
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FNA Vol. 26 Page 374, 388, 390 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 26 | Iridaceae | Iris

26. Iris versicolor Linnaeus, Sp. Pl. 1: 39. 1753.

Blue flag, iris versicolore

Rhizomes pale pinkish white, freely branching, forming large clumps, 1—2.5 cm diam., clothed with remnants of old leaves; roots fleshy. Stems 1—2-branched, solid, 2—6 dm. Leaves: basal with blade green to grayish green, often purplish basally, centrally thickened in mature leaves, prominently veined, narrowly ensiform, 1—8 dm × 1—3 cm; cauline 1—2, blade linear-lanceolate, seldom equaling stem. Inflorescences compact, units 2—4-flowered; spathes never foliaceous, 3—6 cm, unequal, outer shorter than inner, thickly chartaceous to scarious, margins shiny, darker in color. Flowers: perianth violet-blue to rarely white; floral tube funnelform, constricted above ovary, 1—1.2 cm; sepals ovate to reniform, 4—7.2 × 1.8—4 cm, base abruptly attenuate, signal a pubescent, greenish or greenish yellow patch surrounded by heavily veined purple on white at base of blade; petals lanceolate to oblong-lanceolate, 2—5 × 0.5—2 cm, much shorter than sepals, firm, apex rarely emarginate; ovary rounded-triangular in cross section, somewhat inflated, 0.8—2 cm; style 3—3.5 cm, base not auriculate, margins entire or toothed, crests reflexed, 0.7—1.5 cm; stigmas unlobed, triangular or rounded-triangular, margins entire; pedicel 2—8 cm, frequently exceeding spathe. Capsules often persistent over winter, ovoid to oblong-ellipsoid, conspicuously beaked, obtusely triangular in cross section, 1.5—6 cm, tardily dehiscent. Seeds dark brown, D-shaped, 5—8 mm, shiny, thin, hard, regularly pebbled, not corky. 2n = 108.

Flowering May--Jul. Marshy places, along roadsides, shores, and along mountains; Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que.; Conn., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., Ohio, Pa., R.I., Vt., Va., Wis.

E. Anderson (1936) showed rather conclusively that Iris versicolor arose as an amphidiploid between I. virginica (n = 35) and I. hookeri (I. setosa var. canadensis) (n = 19). Back-cross hybrids have been produced both ways: I. virginica × I. versicolor producing Iris ×robusta E. S. Anderson, and I. versicolor × I. hookeri producing I. ×sancti-cyri J. Rousseau.

Iris versicolor is becoming a weed in New Brunswick, Prince Edward Island, and Nova Scotia. Livestock will not eat iris foliage, but feed voraciously on the competition, thus giving the irises plenty of room to expand.

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Iris+versicolor&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Iris+versicolor&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Iris+versicolor&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

Updated: 2017-11-19 04:07:27 gmt
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