Pectis angustifolia var. angustifolia

Common names: Limoncillo lemonscent crownseed pectis
Synonyms: Pectis angustifolia var. subaristata
Treatment appears in FNA Volume 21. Treatment on page 228. Mentioned on page 229.

Annuals, 1–20 cm; herbage lemon-scented. Leaves (crowded at stems tips) 10–45 × 1–3 mm, bases of distal blades notably expanded. Peduncles mostly 1–10 mm (often wholly or partially concealed by bases of subtending leaves). Phyllaries linear, 2.5–5.5 mm, widths ± uniform throughout, each with 1–2 subterminal oil-glands 0.2–0.5 mm plus smaller, submarginal oil-glands. Cypselae 2.5–4 mm; pappi usually coroniform, 0.1–0.3 mm (plus 1–7 awns or bristles in some Texas populations). 2n = 24 (as P. cf. texana).


Phenology: Flowering Jul–Oct.
Habitat: Deserts, grasslands, woodlands, sand bars, roadsides
Elevation: 300–2300 m

Distribution

V21-552-distribution-map.gif

Ariz., Colo., Kans., Nebr., N.Mex., Okla., Tex., Utah, Wyo., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango)

Discussion

Variety angustifolia intergrades with var. tenella across a broad front from southern Texas to eastern Durango. It is locally sympatric and occasionally hybridizes with Pectis papposa var. grandis from southern New Mexico and western Texas to eastern Durango. Forms of var. angustifolia with a pappus of 1 or more awns in addition to the usual low crown have been called var. subaristata A. Gray and may represent introgression from either var. tenella or P. papposa var. grandis.

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
darkened +  and pale +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
David J. Keil +
Torrey +
0 +  and 7 +
decurrent +
expanded +
compound +  and simple +
obovate;oblong;obovate;oblong;oblanceolate;linear to elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Limoncillo +, lemonscent +  and crownseed pectis +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
yellow +  and reddened +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
cylindric +  and narrowly clavate ribbed or angled +
fertile +  and bisexual +
Ariz. +, Colo. +, Kans. +, Nebr. +, N.Mex. +, Okla. +, Tex. +, Utah +, Wyo. +, Mexico (Chihuahua) +, Mexico (Coahuila) +  and Mexico (Durango) +
300–2300 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Deserts, grasslands, woodlands, sand bars, roadsides +
cymiform +, corymbiform +, discoid +  and radiate +
in congested to open , cymiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
lemon-scented +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindric;campanulate +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
deltate +  and lanceovate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
coroniform +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Jul–Oct. +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
3 +  and 15 +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Ann. Lyceum Nat. Hist. New York +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
flat;hemispheric +
5 +  and 20 +
exalbuminous +
branched +  and simple to much +
ascending +  and erect +
puberulent +  and glabrous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Pectis angustifolia var. subaristata +
Pectis angustifolia var. angustifolia +
Pectis angustifolia +
variety +
cylindric +
toothed +  and entire +
1 cm10 mm <br />0.01 m <br /> (20 cm200 mm <br />0.2 m <br />) +
50 cm500 mm <br />0.5 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
shrub +  and subshrub +