familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Coreopsidinae
genusThelesperma
speciesThelesperma ambiguum

Thelesperma ambiguum

A. Gray

Proc. Amer. Acad. Arts 19: 16. 1883.

John L. Strother
Synonyms: Thelesperma fraternum Shinners Thelesperma megapotamicum var. ambiguum (A. Gray) Shinners
Treatment appears in FNA Volume 21. Treatment on page 201. Mentioned on page 200.
Revision as of 23:26, 29 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Perennials or subshrubs, 10–30 (–50) cm. Cauline leaves crowded to ± scattered over proximal 1/3–1/2 of plant heights, internodes mostly 5–50 (–80+) mm; lobes mostly linear to filiform, sometimes oblanceolate, (5–) 15–75 × 0.5–1 (–2) mm. Calyculi of 3–5+ ovate to oblong bractlets 1–3 mm. Ray-florets usually 8, rarely 0; laminae yellow, 4–8 (–12+) mm. Disc corollas redbrown, throats shorter than lobes. Cypselae 4–5+ mm; pappi usually 1.5–2+ mm, rarely 0.2n = 44.


Phenology: Flowering Mar–Jun.
Habitat: Disturbed sites on sands or clays
Elevation: 10–200 m

Distribution

V21-494-distribution-map.gif

N.Mex., Tex., Mexico (Nuevo León), Mexico (Tamaulipas)

Discussion

Thelesperma ambiguum is similar to T. megapotamicum; it may be better treated as a variety of the latter.

Selected References

None.

Lower Taxa

None.

"broader" is not a number.

... more about "Thelesperma ambiguum"
RDF feed
2n chromosome quantity
44 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
dark +  and 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
corymbiform +
Array architecture or fragility
loose +
Array development
indeterminate +  and determinate +
Author
John L. Strother +
Authority
A. Gray +
Awn architecture
smooth +  and ciliate or barbed +
Awn atypical quantity
4 (8) +
Awn quantity
1 +  and 2 +
Awn shape
subulate +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Blade architecture
compound +  and simple +
Blade shape
lobed +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Bract atypical quantity
8 (21) +
Bract quantity
3;8 +
Bractlet atypical quantity
8 (21) +
Bractlet fusion
distinct +
Bractlet growth form or texture
herbaceous +
Bractlet orientation
reflexed +  and spreading +
Bractlet quantity
3;5 +
Bractlet shape
ovate;oblong +
Bractlet some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Branch arrangement or course or shape
linear +
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 arrangement
crowded +  and more or less scattered +
Corolla architecture
zygomorphic +
Corolla coloration
redbrown +, yellow +  and bicolored +
Corolla height or length or size
shorter +
Corolla length or size
longer +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela course or shape
arcuate +
Cypsela growth form
dimorphic +
Cypsela height or length or size
shorter +
Cypsela position
outer +
Cypsela shape
obcompressed +
Cypsela some measurement
4mm;5mm +
Disc-floret quantity
20 (100) +
Disc-floret reproduction
fertile +  and bisexual +
Disc corolla coloration
Redbrown (?) +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
N.Mex. +, Tex. +, Mexico (Nuevo León) +  and Mexico (Tamaulipas) +
Elevation
10–200 m +
Embryo course
straight +
Face architecture or shape
beaked +
Face pubescence
hairy +  and glabrous +
Face relief
papillate +  and tuberculate or verrucate +
Face shape
linear-fusiform;4-angled;ovate;orbiculate;oblong;linear;cuneate +
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
Disturbed sites on sands or clays +
Head architecture
discoid +  and radiate +
Head arrangement
in loose , corymbiform arrays +  and singly +
Head development
indeterminate +
Head reproduction
homogamous +  and heterogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Individual head architecture
each +  and sessile +
Inner corolla shape
obcompressed +  and columnar +
Internode atypical heights
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Internode heights
0.5 cm5 mm <br />0.005 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Involucre diameter
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Involucre position relational
surrounding +
Involucre shape
hemispheric;urceolate +
Lamina atypical some measurement
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Lamina coloration
yellow +
Lamina some measurement
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
opposite +
Leaf position
cauline +  and basal +
Line quantity
2 +
Lobe arrangement or course or shape
lance-linear +
Lobe atypical length
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Lobe atypical quantity
3 (5) +
Lobe atypical width
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Lobe length
15mm (75mm) +
Lobe quantity
5 (5) +
Lobe shape
oblanceolate +, mostly linear +  and filiform +
Lobe size
unequal +
Lobe variability
equal +
Lobe width
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.1 cm1 mm <br />0.001 m <br /> (?) +
Margin architecture
winged +
Margin architecture or shape
dentate to pinnatifid or palmatifid +  and entire +
Margin texture
scarious +
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 +
Palea life cycle
falling +
Palea shape
obovate;oblong +
Palea texture
scarious +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Pappus shape
of 1-2 , smooth to ciliate or barbed awns or scales +  and coroniform +
Pappus some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering Mar–Jun. +
Phyllary duration
persistent +
Phyllary fusion
connate +
Phyllary lengths
1/5 (7/8) +
Phyllary life cycle
falling +
Phyllary quantity
2 +, 5 +  and 8 +
Phyllary shape
Lanceovate (Ovate) +
Phyllary size
unequal +
Phyllary texture
Less leathery (Membranous) +
Phyllary variability
equal +
Plant position
proximal +
Plant quantity
1/3 +  and 1/2 +
Publication title
Proc. Amer. Acad. Arts +
Publication year
1883 +
Ray-floret architecture
neuter +
Ray-floret presence
absent +
Ray-floret quantity
8 (?) +
Ray-floret reproduction
sterile +  and fertile +
Receptacle architecture
paleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
flat;convex +
Reference
None +
Root texture
fibrous +
Scale shape
subulate +
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 494.xml +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
Stem orientation
erect +
Stem quantity
1 +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Thelesperma fraternum +  and Thelesperma megapotamicum var. ambiguum +
Taxon family
Asteraceae +
Taxon name
Thelesperma ambiguum +
Taxon parent
Thelesperma +
Taxon rank
species +
Throat height or length or size
shorter +
Throat variability
equal +
Tube variability
equaling +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism atypical some measurement
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
Whole-organism duration
perennial +
Whole-organism some measurement
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Whole organism atypical some measurement
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
Whole organism growth form
subshrub +
Whole organism some measurement
10cm (30cm) +
X chromosome quantity
12 +