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Berteroa incana (L. ) Dc.
Alyssum incanum L; Hoary alyssum

Life   Plantae   Dicotyledoneae   Brassicaceae   Berteroa

Berteroa incana
© Les Mehrhoff, 2008-2010 · 2
Berteroa incana

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Berteroa incana, seed
© Copyright Seeds USID 2015 · 1
Berteroa incana, seed
Berteroa incana, seed
© Copyright Seeds USID 2015 · 1
Berteroa incana, seed

Berteroa incana, leaf and flower and fruit
© Kay Yatskievych, 2003 · 1
Berteroa incana, leaf and flower and fruit

Associates · map
FamilyScientific name @ source (records)
Albuginaceae  Albugo candida @ BPI (5)
Erysiphaceae  Erysiphe communis @ BPI (2)
Halictidae  Halictus confusus @ CUIC_ENT (1)
Miridae  Orthotylus coagulatus @ AMNH_PBI (2)

Orthotylus flavosparsus @ AMNH_PBI (2)
Mycosphaerellaceae  Cercospora berteroae @ BPI (2)

Septoria berteroae @ BPI (1)
Peronosporaceae  Peronospora alyssi-incani @ BPI (1)

Peronospora berteroae @ BPI (2)

Peronospora parasitica @ BPI (2)
Phaeosphaeriaceae  Leptosphaeria conferta @ BPI (3)

Leptosphaeria maculans @ BPI (2)

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Following modified from MissouriPlants.com
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Berteroa incana  (L.) DC.

Berteroa incana plant

Family - Brassicaceae

Stems - Multiple from the base, erect to ascending, herbaceous, mostly unbranched (except at apex), to 1m tall, scabrous from dense forked and stellate pubescence.

Berteroa incana stem Stem.

Leaves - Alternate, sessile. Blades linear-elliptic, entire, 5-8cm long, +/-1cm broad, rounded to subacute at apex, stellate pubescent above and below, reduced upward on stem.

Inflorescence - Terminal and lateral racemes to +/-25cm long. Racemes dense in flower, quickly elongating in fruit. Pedicels ascending, to 7-8mm long, stellate and forked pubescent.

Berteroa incana inflorescence Inflorescence.

Flowers - Petals 4, 5-7mm long, deeply notched at apex, tapering at base, glabrous. Lobes rounded to acute at apex. Stamens 6, erect, glabrous, white, 3-4mm long. Anthers yellow, to 1mm long. Ovary superior, green, densely stellate pubescent, 1mm long in flower. Style green, to 2mm long, sparse stellate pubescent, persistent in fruit. Sepals 4, erect, densely stellate pubescent externally, glabrous internally, 3-4mm long, to 1mm broad, with scarious margins, elliptic, acute. Silicle 6-7mm long, elliptic-ovate to orbicular, stellate pubescent, beaked, with 6-10 seeds. Beak to 2mm long.

Berteroa incana flowers

Berteroa incana fruit Fruit.

Flowering - May - September.

Habitat - Roadsides, railroads, waste ground.

Origin - Native to Europe.

Other info. - This striking species is rare in Missouri but is becoming more common. The plant is very common in more northern states and is spreading throughout much of eastern North America. The plant is easy to ID in the field because of its deeply divided white petals and gray stellate pubescence.

Photographs taken in Marquette, MI., 7-25-02.

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Following modified from Plants Database, United States Department of Agriculture
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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. 7 Page 249 , 252, 253 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 7 | Brassicaceae | Berteroa

1. Berteroa incana (Linnaeus) de Candolle, Syst. Nat. 2: 291. 1821.

Alyssum incanum Linnaeus, Sp. Pl. 2: 650. 1753

Plants densely pubescent, trichomes appressed, stellate mixed with simple ones. Stems simple or few from base, (2-)3-8(-11) dm. Basal leaves (withered by flowering) : blade oblanceolate, (2.5-)3.5-8(-10) cm, base cuneate or attenuate, apex obtuse. Cauline leaves: blade apex acute or obtuse. Fruiting pedicels appressed to rachis, (4-)5-9(-12) mm. Flowers: sepals 2-2.5 mm; petals narrowly obcordate, (4-)5-6.5(-8) mm (lobes oblong, (1-)1.5-3 × 0.5-1.5 mm); filaments white, median pair 2-3.3 mm, lateral pair 0.3-1 mm; anthers 0.5-1 mm. Fruits (4-)5-8.5(-10) × (2-)2.5-4 mm; valves obtuse at both ends, trichomes sometimes with unequal rays; style 1-4 mm, sparsely pubescent basally. Seeds slightly flattened, narrowly margined, 1-2.3 mm diam. 2 n = 16.

Flowering May-Sep. Flood plains, meadows, waste places, railroad embankments, woodlands, grasslands, roadsides, fields, stream banks, pastures, hillsides, forest floor; 0-2800 m; introduced; B.C., Man., N.B., Ont., Que., Sask.; Ariz., Calif., Colo., Conn., D.C., Idaho, Ill., Ind., Iowa, Kans., Maine, Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Europe; Asia.

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Berteroa+incana&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=Berteroa+incana&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Updated: 2018-05-27 14:32:37 gmt
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