familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Rudbeckiinae
genusRudbeckia
sectionRudbeckia sect. Dracopis
speciesRudbeckia amplexicaulis

Rudbeckia amplexicaulis

Vahl

Skr. Naturhist. Selsk. 2(2): 29, plate 4. 1793.

Lowell E. Urbatsch, Patricia B. Cox
Common names: Clasping or clasping-leaf coneflower
IllustratedEndemic
Synonyms: Dracopis amplexicaulis (Vahl) Cassini
Treatment appears in FNA Volume 21. Treatment on page 46.
Please click on the illustration for a higher resolution version.
Illustrator: John Myers

Copyright: Flora of North America Association

Leaf-blades 3–15 × 0.5–4 cm. Involucres 1–4 cm diam. Phyllaries spreading to reflexed, green, linear to lanceolate, herbaceous. Ray laminae spreading, eventually reflexed, elliptic to obovate, 12–30 × 7–15 mm, abaxially hirsute. Disc corollas 2.8–3.5 mm. Cypselae: each face 4–5-striate and minutely cross-rugose, glabrous; pappi 0 (cypselae each with ring of tan tissue at apex, ca. 0.1 mm). 2n = 32.


Phenology: Flowering late spring–summer.
Habitat: Open sites, moist soils
Elevation: 0–400 m

Distribution

V21-88-distribution-map.gif

Ala., Ark., Fla., Ga., Ill., Kans., La., Miss., Mo., N.Mex., N.Dak., Okla., S.C., Tex.

Discussion

Rudbeckia amplexicaulis grows mainly in the Gulf coastal plain and Mississippi Embayment. It may be adventive elsewhere. It is used in “native” meadow and roadside plantings and has become a problem in some agricultural crops.

Selected References

None.

Lower Taxa

None.
... more about "Rudbeckia amplexicaulis"
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2n chromosome quantity
32 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
dark +
Apex fusion
connate +  and distinct +
Apex growth form or texture
herbaceous +
Apex shape
subulate;mucronate;obtuse;acute +
Apex size
subequal +
Apex texture
scarious +
Apical appendage presence
absent +
Apical appendage shape
usually ovate +  and lanceolate +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Appendage shape
usually deltate +  and lanceolate +
Array architecture
paniculiform +, corymbiform +  and loose +
Array development
indeterminate +  and determinate +
Author
Lowell E. Urbatsch +  and Patricia B. Cox +
Authority
Vahl +
Band architecture
continuous +
Band quantity
1 +
Basal leaf architecture
sessile +  and petiolate +
Base architecture or fixation
clasping +
Base shape
auriculate +
Basionyms
Obeliscaria subg. Dracopis +
Blade architecture
compound +  and simple +
Blade shape
ovate;oblong;ovate;oblong;oblanceolate;lanceolate;elliptic;not lobed;ovate;oblong;ovate;oblong;oblanceolate;lanceolate;elliptic +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Bractlet quantity
1;15 +
Branch arrangement or course or shape
linear +
Branch position
proximal +
Branch quantity
1/2 +
Branch some measurement
1.7 cm17 mm <br />0.017 m <br /> (?) +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellulate +  and barbellate +
Bristle shape
Plumose (?) +
Calyculus presence
absent +
Calyculus quantity
Of 1 (15+ bractlets) +
Cauline leaf architecture
sessile +
Common name
Clasping or clasping-leaf coneflower +
Corolla architecture
tipped +
Corolla coloration
purplish +, greenish yellow +, maroon +, orange +  and yellow +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela growth form
dimorphic +
Cypsela pubescence
hairy +  and glabrous +
Cypsela shape
flattened +, fusiform-terete +  and obpyramidal +
Cypsela some measurement
1.8mm;2.5mm +
Disc-floret quantity
0 (400) +
Disc-floret reproduction
fertile +  and bisexual +
Disc corolla some measurement
0.28 cm2.8 mm <br />0.0028 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Disc length
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Disc width
8mm;15mm +
Distribution
Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Kans. +, La. +, Miss. +, Mo. +, N.Mex. +, N.Dak. +, Okla. +, S.C. +  and Tex. +
Elevation
0–400 m +
Embryo course
straight +
Face coloration or pubescence or relief
4-5-striate +
Face pubescence
glabrous +
Face relief
cross-rugose +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
1;5 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Glomerule arrangement
singly +
Habitat
Open sites, moist soils +
Head architecture
discoid +  and radiate +
Head architecture or arrangement
radiate +
Head architecture or shape
discoid +
Head arrangement
singly +
Head development
indeterminate +
Head reproduction
homogamous +  and heterogamous +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
John Myers +
Individual head architecture
each +  and sessile +
Involucre diameter
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Involucre position relational
surrounding +
Involucre shape
fusiform;turbinate or broadly campanulate +
Leaf-blade length
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Leaf-blade width
0.5cm;4cm +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
opposite +
Leaf coloration
bluish green +
Leaf position
cauline +
Leaf pubescence
glaucous +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe quantity
5 (?) +
Lobe shape
deltate +  and lance-linear +
Margin architecture or shape
serrate +  and entire +
Margin shape
crenate +
Number of lower taxa
0 +
Ovary architecture
2-carpellate +
Ovary architecture or structure in adjective form
1-locular +
Ovary position
inferior +
Ovule fixation
attached +
Ovule orientation
anatropous +
Ovule quantity
1 +
Pappus atypical quantity
2 (5) +
Pappus duration
persistent +
Pappus length or size
longer +
Pappus life cycle
falling +
Pappus presence
absent +
Pappus quantity
0 +  and 2 +
Pappus shape
subulate +  and aristate +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering late spring–summer. +
Phyllary atypical quantity
5 (15) +
Phyllary coloration
Green (?) +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary growth form or texture
herbaceous +
Phyllary life cycle
falling +
Phyllary orientation
spreading +  and reflexed +
Phyllary quantity
3 +  and 21 +
Phyllary shape
Linear (Lanceolate) +
Phyllary size
unequal +
Phyllary texture
Herbaceous (Chartaceous) +
Publication title
Skr. Naturhist. Selsk. +
Publication year
1793 +
Ray-floret architecture
pistillate +
Ray-floret atypical quantity
8 (13) +
Ray-floret presence
absent +
Ray-floret quantity
6 (10) +
Ray-floret reproduction
fertile +
Ray lamina length
1.2 cm12 mm <br />0.012 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Ray lamina orientation
reflexed +  and spreading +
Ray lamina pubescence
hirsute +
Ray lamina shape
elliptic +  and obovate +
Ray lamina width
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
pitted +  and smooth +
Receptacle shape
ovoid;conic +
Reference
None +
Root texture
fibrous +
Scale atypical quantity
5 (10) +
Scale fusion
connate +  and distinct +
Scale quantity
2 +  and 5 +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
2 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 88.xml +
Special status
Illustrated +  and Endemic +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
Stem coloration
green +
Stem orientation
erect +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Style some measurement
5 cm50 mm <br />0.05 m <br /> (?) +
Synonyms
Dracopis amplexicaulis +
Taxon family
Asteraceae +
Taxon name
Rudbeckia amplexicaulis +
Taxon parent
Rudbeckia sect. Dracopis +
Taxon rank
species +
Throat shape
cylindric +
Throat variability
equaling +
Tooth quantity
2 (8) +
Tube height or length or size
shorter +
Tube length or size
much longer +
Ultimate margin architecture or shape
dentate +  and entire +
Ultimate margin shape
entire +  and toothed +
Volume
Volume 21 +
Whole-organism atypical some measurement
60 cm600 mm <br />0.6 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
Whole-organism duration
annual +
Whole-organism some measurement
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Whole organism atypical some measurement
80 cm800 mm <br />0.8 m <br /> (200 cm2,000 mm <br />2 m <br />) +
Whole organism growth form
shrub +  and subshrub +
Whole organism some measurement
10cm (80cm) +
X chromosome quantity
16 +