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Ratibida pinnata (Vent.) Barnhart
Life   Plantae   Dicotyledoneae   Asteraceae   Ratibida

Ratibida pinnata
© Copyright Bobby Hattaway 2011 · 5
Ratibida pinnata

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Ratibida pinnata
© Copyright Bobby Hattaway 2011 · 5
Ratibida pinnata
Ratibida pinnata
© Copyright Bobby Hattaway 2011 · 5
Ratibida pinnata

Ratibida pinnata
© Copyright Bobby Hattaway 2011 · 5
Ratibida pinnata
Ratibida pinnata
© Copyright Bobby Hattaway 2011 · 5
Ratibida pinnata

Ratibida pinnata
© Copyright Bobby Hattaway 2011 · 5
Ratibida pinnata
Ratibida pinnata
© Copyright Bobby Hattaway 2011 · 5
Ratibida pinnata

Ratibida pinnata, leaf and flower
© Kay Yatskievych, 2003 · 1
Ratibida pinnata, leaf and flower

Associates · map
FamilyScientific name @ source (records)
Apidae  Bombus griseocollis @ MLSB__N16- (2)

Melissodes agilis @ MLSB__N16- (1)

Melissodes subillatus @ MLSB__N16- (2)

Triepeolus lunatus @ MLSB__N16- (2)
Botryosphaeriaceae  Phyllosticta entylomicola @ BPI (2)
Chrysomelidae  Diabrotica undecimpunctata @ MLSB__N16- (1)
Coccinellidae  Coleomegilla maculata @ I_LB (1)

Hippodamia variegata @ MLSB__N16- (1)
Entylomataceae  Entyloma compositarum @ BPI (2)
Erysiphaceae  Oidium @ BPI (1)
Halictidae  Halictus ligatus @ MLSB__N16- (4)

Lasioglossum ( @ MLSB__N16- (1)
Megachilidae  Coelioxys alternata @ MLSB__N16- (1)

Megachile mendica @ MLSB__N16- (1)

Megachile texana @ MLSB__N16- (1)
Mycosphaerellaceae  Cercospora ratibidae @ BPI (1)
Peronosporaceae  Plasmopara halstedii @ BPI (4)
Syrphidae  Allograpta obliqua @ MLSB__N16- (1)

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Following modified from MissouriPlants.com
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Ratibida pinnata (Vent.) Barnh. - Gray Head Coneflower

Ratibida pinnata plant

Family - Asteraceae

Stems - To -2m tall, multiple from base, herbaceous, erect, branching above, hirsute, scabrous, carinate, from caudex.

Ratibida pinnata stem

Leaves - Alternate, sessile, pinnatifid to pinnately divided, +/-18cm long, scabrous, hirsute on midrib, with typically 3-11 lobes. Lobes entire to coarsely toothed, often divided again. Basal leaves drying before flowers.

Ratibida pinnata leaves

Inflorescence - Single flower heads from long(+/-20cm) naked peduncles.

Involucre - Phyllaries spreading to reflexed, +/-9mm long, 2mm broad, subulate, antrorse strigose, scabrous.

Ratibida pinnata involucre Involucre.

Ray flowers - Flowers typically 10 in number. Ligule yellow, +/-6cm long, to 1.5cm broad, pubescent below and less so above, notched at apex, spreading to reflexed. Flowers sterile. Achene 2.5mm long, pubescent at apex. Pappus absent.

Disk flowers - Disk to 1.5cm in diameter, 2cm long, subglobose. Flowers fertile. Corolla tube to 2mm long, glabrous, 5-lobed. Lobes .2mm long, acute, deep brownish-purple, spreading. Stamens 5. Anthers deep brownish-purple, connate around style. Pollen yellow. Style exserted, bifurcate. Stigma deep brownish-purple. Achene slightly flattened, 3mm long, white, glabrous. Pappus absent. Receptacle 1cm long, 3mm broad, cylindrical. Chaff with purple margins, white below, green at apex, 5mm long, partially surrounding achene.

Ratibida pinnata flowers

Flowering - May - September.

Habitat - Prairies, thickets, woodland edges, streambanks, railroads.

Origin - Native to U.S.

Other info. - This plant is common in the state and easy to ID in the field. The subglobose disk, long ray ligules, and pinnate leaves are good characteristics to look for.
I first photographed this plant by Buffalo Creek in Ripley County. Besides being a great place for plants, Buffalo Creek is loaded with crayfish:

Oronectes luteus Oronectes luteus

Oronectes punctinamus Oronectes punctinamus

I had tons of fun snorkeling and catching these crayfish in the crystal clear waters of Buffalo Creek. As tempted as I was, I did not eat any for dinner that evening.

Plant photographs taken off Hwy H., Shannon County, MO., 7-3-03 and 6-25-04.


Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=RAPI ---> https://plants.usda.gov/java/profile?symbol=RAPI
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://plants.usda.gov/java/profile?symbol=RAPI

Following modified from Flora of North America
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Link to Flora of North America home
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FNA Vol. 21 Page 59 , 61, 62 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 21 | Asteraceae | Ratibida

3. Ratibida pinnata (Ventenat) Barnhart, Bull. Torrey Bot. Club. 24: 410. 1897.

Grayhead or pinnate prairie coneflower

Rudbeckia pinnata Ventenat, Descr. Pl. Nouv., plate 71. 1802

Perennials, to 125+ cm; fibrous rooted (arising from stout rhizomes or woody caudices). Leaves 5—40 × 3—15+ cm, pinnatifid to pinnate, lobes 3—9, narrowly lanceolate to ovate, 1—15 × 0.2—3.5 cm, faces strigose, gland-dotted. Heads mostly 1—12, held well beyond leaves. Peduncles 3—27+ cm (ribs tan, prominent). Phyllaries 10—15, outer linear, 3—15 × 1—3 mm, inner lanceolate-ovate, 3—6 × 0.7—3 mm. Paleae 1.2—5 × 1—1.8 mm, resin glands linear to oblanceolate, 2—3.3 mm. Ray florets 6—15; corollas yellow, 2.5—3.8 mm, tubes ca. 1—3 mm, hirsute, laminae linear-elliptic to oblong-oblanceolate, 16—60 × 4—15 mm. Discs ellipsoid to globular or ovoid, 10—25 × 10—18 mm. Disc florets 100—200+; corollas greenish yellow, often purplish distally, 2.5—3.8 mm; style branches ca. 1.8 mm, proximal 1 /2 stigmatic, apices subulate. Cypselae linear-oblanceoloid, 2—4 × 1—2.3 mm, margins usually glabrous, sometimes adaxial ciliate; pappi 0 or of 1—2 toothlike projections. 2 n = 28.

Flowering May—Oct. Prairies, woodland openings and borders, limestone outcrops; 10—300 m; Ont.; Ala., Ark., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Mass., Mich., Minn., Miss., Mo., Nebr., N.Y., Ohio, Okla., S.Dak., Tenn., Vt., Wis.

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Ratibida+pinnata&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=Ratibida+pinnata&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=Ratibida+pinnata&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

Updated: 2018-01-20 01:11:30 gmt
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