Pectis linearifolia

Urban

Symb. Antill. 5: 276. 1907.

Common names: Florida chinchweed
Endemic
Treatment appears in FNA Volume 21. Treatment on page 226. Mentioned on page 224.

Annuals, 4–40 cm; herbage lemon-scented. Stems decumbent to erect (very leafy), glabrous or puberulent (in decurrent lines). Leaves linear, 10–50 × 1–3 mm, margins with 2–6 pairs of setae, faces glabrous (abaxial dotted submarginally with round oil-glands 0.2–0.5 mm). Heads borne singly or in congested, (leafy) cymiform arrays. Peduncles 0–1 mm. Involucres narrowly campanulate to cylindric. Phyllaries distinct, linear or linear-oblanceolate, 5–6 × 1–1.5 mm (dotted with scattered, elliptic oil-glands 0.4–0.5 mm). Ray-florets 5; corollas 4.5–5.5 mm. Disc-florets 4–10; corollas 2.5–3 mm (2-lipped). Cypselae 2.25–3.25 mm, puberulent; pappi (ray and disc similar) of 2–5 antrorsely barbed bristles or awns 1.5–2.5 mm plus shorter, barbellate scales. 2n = 48.


Phenology: Flowering mostly Aug–Dec.
Habitat: Open sites, sandy-gravelly soils with grasses and other herbs
Elevation: 0–50 m

Discussion

Reports of Pectis linearifolia from Jamaica were based on misidentifications of diminutive, short-peduncled individuals of P. glaucescens (D. J. Keil 1986). In Florida, P. linearifolia and P. glaucescens are largely allopatric; they occasionally occur in mixed populations. No hybrids are known.

Selected References

None.

Lower Taxa

None.
... more about "Pectis linearifolia"
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 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
decurrent +
compound +  and simple +
obovate;oblong;obovate;oblong;oblanceolate;linear to elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Florida chinchweed +
yellow +  and reddened +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
cylindric +  and narrowly clavate ribbed or angled +
fertile +  and bisexual +
0–50 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open sites, sandy-gravelly soils with grasses and other herbs +
cymiform +, corymbiform +, discoid +  and radiate +
in congested , 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 />) +
narrowly campanulate;cylindric +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 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 +
persistent +
coroniform +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Flowering mostly Aug–Dec. +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
3 +  and 15 +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Symb. Antill. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
flat;hemispheric +
5 +  and 20 +
exalbuminous +
branched +  and simple to much +
decumbent +  and erect +
puberulent +  and glabrous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Tageteae +
Pectis linearifolia +
species +
cylindric +
toothed +  and entire +
4 cm40 mm <br />0.04 m <br /> (40 cm400 mm <br />0.4 m <br />) +
50 cm500 mm <br />0.5 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
shrub +  and subshrub +