familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Pectidinae
genusPectis
speciesPectis angustifolia
varietyPectis angustifolia var. tenella

Pectis angustifolia var. tenella

(de Candolle) D. J. Keil

Rhodora 79: 58. 1977.

David J. Keil
Common names: Mexican chinchweed low pectis
Basionym: Pectis tenella de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 99. 1836
Treatment appears in FNA Volume 21. Treatment on page 229. Mentioned on page 228.

Annuals, 2–15 cm; herbage spicy-scented (lemon-scented in some Mexican populations). Leaves 10–40 mm, bases of distal blades not notably expanded. Peduncles 5–15 mm. Phyllaries linear, 3–5 mm, widest near middles, each with 1 subterminal oil-gland 0.2–0.5 mm plus smaller, submarginal oil-glands. Cypselae 2.5–4 mm; pappi of 0–7 awns or bristles 1–3 mm and/or coroniform. 2n = 24.


Phenology: Flowering Jun–Dec.
Habitat: Deserts, grasslands, arid woodlands, shrublands, roadsides
Elevation: 100–1100(–2500) m

Distribution

V21-554-distribution-map.gif

N.Mex., Tex., Mexico (Aguascalientes), Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango), Mexico (Nuevo León), Mexico (San Luis Potosí), Mexico (Tamaulipas), Mexico (Veracruz), Mexico (Zacatecas)

Discussion

Variety tenella is widely distributed in the Chihuahuan Desert and adjacent regions. The isolated occurrence in northern New Mexico perhaps represents an introduction.

Selected References

None.

Lower Taxa

None.

"widest" is not a number.

... more about "Pectis angustifolia var. tenella"
RDF feed
2n chromosome quantity
24 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
darkened +  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
cymiform +
Array architecture or arrangement
congested +
Array development
indeterminate +  and determinate +
Author
David J. Keil +
Authority
(de Candolle) D. J. Keil +
Awn pubescence or relief
scabrid +
Awn quantity
0 +  and 7 +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Base size
expanded +
Basionyms
Pectis tenella +
Blade architecture
compound +  and simple +
Blade arrangement or course or shape
linear +
Blade shape
obovate;oblong;obovate;oblong;oblanceolate;linear to elliptic +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Bractlet quantity
1;22 +
Branch arrangement or course or shape
linear +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellulate +  and barbellate +
Bristle quantity
20;50 +
Bristle shape
Plumose (?) +
Bristle some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Calyculus presence
absent +
Calyculus quantity
Of 1 (22 bractlets) +
Common name
Mexican chinchweed +  and low pectis +
Corolla architecture
zygomorphic +
Corolla atypical some measurement
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Corolla coloration
yellow +  and reddened +
Corolla some measurement
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela growth form
dimorphic +
Cypsela pubescence
strigillose +
Cypsela shape
cylindric +  and narrowly clavate ribbed or angled +
Cypsela some measurement
2.5mm;4mm +
Disc-floret atypical quantity
7 (10) +
Disc-floret quantity
10 (20) +
Disc-floret reproduction
bisexual +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
N.Mex. +, Tex. +, Mexico (Aguascalientes) +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Durango) +, Mexico (Nuevo León) +, Mexico (San Luis Potosí) +, Mexico (Tamaulipas) +, Mexico (Veracruz) +  and Mexico (Zacatecas) +
Elevation
100–1100(–2500) m +
Embryo course
straight +
Face pubescence
glabrous +
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 +
Funnelform shape
cylindric +
Glomerule arrangement
singly +
Habitat
Deserts, grasslands, arid woodlands, shrublands, roadsides +
Head architecture
cymiform +, corymbiform +, discoid +  and radiate +
Head architecture or arrangement
radiate +
Head arrangement
in congested to open , cymiform arrays +  and singly +
Head development
indeterminate +
Head reproduction
homogamous +  and heterogamous +
Herbage odor
spicy-scented +
Illustration copyright
Flora of North America Association +
Illustrator
John Myers +
Individual head architecture
each +  and sessile +
Involucre diameter
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Involucre position relational
surrounding +
Involucre shape
cylindric;campanulate +
Leaf architecture
sessile +
Leaf arrangement
opposite +
Leaf arrangement or course or shape
linear +
Leaf length
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Leaf position
cauline +
Leaf some measurement
1 cm10 mm <br />0.01 m <br /> (?) +  and 4 cm40 mm <br />0.04 m <br /> (?) +
Leaf width
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Line quantity
2 +
Lobe atypical quantity
4 (5) +
Lobe quantity
5 (?) +
Lobe shape
deltate +  and lanceovate +
Margin architecture or pubescence or shape
setose-ciliate +
Margin architecture or shape
dentate to pinnatifid or palmatifid +  and entire +
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 +
Pair quantity
2 (5) +
Pair some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Pappus shape
coroniform +
Peduncle some measurement
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering Jun–Dec. +
Phyllary arrangement or course or shape
linear +
Phyllary atypical quantity
15 (21) +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary length
0.25 cm2.5 mm <br />0.0025 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Phyllary life cycle
falling +
Phyllary quantity
3 +  and 15 +
Phyllary shape
Oblanceolate (Linear) +
Phyllary size
smaller +
Phyllary some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Phyllary texture
Herbaceous (Chartaceous) +
Publication title
Rhodora +
Publication year
1977 +
Ray-floret architecture
pistillate +
Ray-floret atypical quantity
15 (21) +
Ray-floret presence
absent +
Ray-floret quantity
8 (?) +
Ray-floret reproduction
fertile +
Receptacle architecture
epaleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
pitted +  and smooth +
Receptacle shape
flat;hemispheric +
Reference
None +
Root texture
fibrous +
Scale quantity
5 +  and 20 +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
1 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 554.xml +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +  and simple to much +
Stem orientation
ascending +  and erect +
Stem pubescence
puberulent +  and glabrous +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Subterminal gland-oil distance
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Subterminal gland-oil quantity
1 (?) +
Synonyms
Undefined (tribe Undefined) subtribe Tageteae +
Taxon family
Asteraceae +
Taxon name
Pectis angustifolia var. tenella +
Taxon parent
Pectis angustifolia +
Taxon rank
variety +
Throat shape
cylindric +
Tube height or length or size
shorter +
Tube length or size
much longer +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism duration
annual +
Whole-organism some measurement
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Whole organism atypical some measurement
50 cm500 mm <br />0.5 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
Whole organism average some measurement
200cm (5cm) +
Whole organism growth form
shrub +  and subshrub +
Whole organism some measurement
5cm (50cm) +
X chromosome quantity
12 +