familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Gaillardiinae
genusHelenium
speciesHelenium microcephalum
varietyHelenium microcephalum var. microcephalum

Helenium microcephalum var. microcephalum

Mark W. Bierner
Treatment appears in FNA Volume 21. Treatment on page 434.
Revision as of 21:36, 29 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Plants 30–120 cm. Leaves: proximal and mid-blades serrate to undulate-serrate, glabrous or sparsely hairy; distal blades glabrous or sparsely hairy. Heads 20–150 (–300+) per plant. Peduncles 1–3.5 cm, projecting terminal heads barely beyond foliage. Involucres 4–8 × 4–8 mm. Ray-florets 7–13; corollas yellow, 2.6–4.8 × 1.6–3.9 mm. Disc-florets 120–300+; corollas 1.2–1.6 mm, lobes (4–) 5. Pappi (0.2–) 0.3–0.4 (–0.5) mm. 2n = 26.


Phenology: Flowering (Feb–)Jun–Jul(–Nov).
Habitat: Sandy or clay soils, ditches, washes, around ponds and lakes, along streams
Elevation: 0–1500 m

Distribution

V21-1087-distribution-map.gif

Ariz., N.Mex., Okla., Tex., Mexico (Coahuila), Mexico (Nuevo León), Mexico (and Tamaulipas)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Helenium microcephalum var. microcephalum"
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2n chromosome quantity
26 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
pale +
Apex fusion
connate +  and distinct +
Apex growth form or texture
herbaceous +
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 +
Array development
indeterminate +  and determinate +
Author
Mark W. Bierner +
Authority
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Blade architecture
compound +  and simple +
Blade shape
pinnatifid;lobed;spatulate;ovate;spatulate;ovate;oblong;oblanceolate;linear;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 structure in adjective form
stigmatic +
Bristle architecture
barbellulate +  and barbellate +
Bristle quantity
35;150 +
Bristle shape
Plumose (?) +
Calyculus presence
absent +
Calyculus quantity
Of 1 (15+ bractlets) +
Corolla architecture
zygomorphic +
Corolla coloration
yellow +
Corolla length
0.26 cm2.6 mm <br />0.0026 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
Corolla some measurement
0.12 cm1.2 mm <br />0.0012 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Corolla width
0.16 cm1.6 mm <br />0.0016 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela growth form
dimorphic +
Cypsela pubescence
hairy +
Cypsela shape
4-5-angled +  and obpyramidal +
Cypsela some measurement
0.7mm;1.4mm +
Disc-floret architecture
staminate +
Disc-floret quantity
120 (300) +
Disc-floret reproduction
fertile +  and bisexual +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distal blade pubescence
hairy +  and glabrous +
Distal blade shape
narrowly elliptic;narrowly oblongelliptic serrate +
Distribution
Ariz. +, N.Mex. +, Okla. +, Tex. +, Mexico (Coahuila) +, Mexico (Nuevo León) +  and Mexico (and Tamaulipas) +
Elevation
0–1500 m +
Embryo course
straight +
Face coloration
gland-dotted +
Face pubescence
glabrous or +  and sparsely densely hairy +
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 architecture
corymbiform +
Glomerule arrangement
singly +
Habitat
Sandy or clay soils, ditches, washes, around ponds and lakes, along streams +
Head architecture
discoid +  and radiate +
Head arrangement
singly +
Head atypical quantity
150 (300) +
Head development
indeterminate +
Head quantity
20;150 +
Head reproduction
homogamous +  and heterogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Individual head architecture
each +  and sessile +
Involucre diameter
0.4 cm4 mm <br />0.004 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
Involucre length
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Involucre position relational
surrounding +
Involucre shape
ovoid +
Involucre width
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
alternate +
Leaf position
cauline +
Leaf pubescence
glabrous or +  and sparsely moderately hairy +
Line quantity
2 +
Lobe atypical quantity
4 (5) +
Lobe quantity
5 (?) +
Lobe shape
deltate +
Margin architecture or shape
dentate to pinnatifid or palmatifid +  and entire +
Number of lower taxa
0 +
Outer phyllary fusion
connate +  and distinct +
Outer phyllary shape
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
Outer phyllary size
unequal +  and subequal +
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 architecture or shape
entire +
Pappus atypical some measurement
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus quantity
6 +
Pappus some measurement
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Peduncle pubescence
hairy +
Peduncle some measurement
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering (Feb–)Jun–Jul(–Nov). +
Phyllary atypical quantity
34 (40) +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary life cycle
falling +
Phyllary pubescence
hairy +
Phyllary quantity
9 +  and 34 +
Phyllary size
unequal +
Phyllary texture
Herbaceous (Chartaceous) +
Proximal mid-blade pubescence
hairy +  and glabrous +
Proximal mid-blade shape
Serrate (Undulate-serrate) +
Publication title
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Publication year
1836 +
Ray-floret architecture
pistillate +
Ray-floret presence
absent +
Ray-floret quantity
7 (13) +
Ray-floret reproduction
fertile +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
pitted +
Receptacle shape
ovoid;hemispheric;ovoid;hemispheric;globose;conic +
Reference
None +
Root texture
fibrous +
Scale atypical some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Scale presence
absent +
Scale quantity
5 +  and 12 +
Scale shape
non-aristate +
Scale some measurement
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
2 (3) +
Series quantity
2 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 1087.xml +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
winged +  and branched +
Stem atypical quantity
2 (?) +  and 10 (?) +
Stem orientation
erect +
Stem pubescence
hairy +  and glabrous +
Stem quantity
1 +
Streak coloration or density
purple +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Compositae +
Taxon family
Asteraceae +
Taxon name
Helenium microcephalum var. microcephalum +
Taxon parent
Helenium microcephalum +
Taxon rank
variety +
Terminal head orientation
projecting +
Throat shape
urceolate +  and campanulate +
Tube height or length or size
shorter +
Tube shape
dilated +
Tube variability
equaling +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism duration
annual +
Whole-organism some measurement
25 cm250 mm <br />0.25 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
Whole organism growth form
plant +
Whole organism some measurement
30cm (120cm) +
X chromosome quantity
17 +