Laennecia filaginoides Dc.

Trans-pecos horseweed (en)

Species

Angiosperms > Asterales > Asteraceae > Laennecia

Characteristics

Annuals, 10–30+ cm. Leaf blades: bases obscurely, if at all, clasping, faces densely to loosely tomentose (at least abaxially, sometimes glandular beneath tomentum); proximal narrowly obovate or oblanceolate to linear, 10–30 × 1–5 mm, often obscurely pinnately lobed or toothed; distal similar, smaller, entire or distally toothed. Heads in ± racemiform arrays (on main and lateral stems). Involucres 3.5–4.5 mm. Receptacles 1.5–2.5 mm diam. Pistillate florets 20–40+; corollas: lengths ± 1 / 2 styles, laminae 0. Disc florets 3–10. Cypselae purplish, 1.3–1.5 mm, densely sericeous (hairs 0.3–0.5 mm), sometimes glandular near apices; pappi of 30–40+ white bristles in 2 series, outer ± persistent, 0.8–1 mm, inner persistent or ± fragile, 2–3 mm. 2n = 18.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 0.3
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

Usage

Uses medicinal
Edible -
Therapeutic use Catarrh (unspecified), Cholera (unspecified), Excrescence (unspecified), Gastritis (unspecified), Hepatitis (unspecified), Inappetence (unspecified), Meteorism (unspecified), Bilious (unspecified), Colic (unspecified), Jaundice (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Laennecia filaginoides world distribution map, present in Colombia, Ecuador, Guatemala, Mexico, Peru, United States of America, and Venezuela (Bolivarian Republic of)

Identifiers

LSID urn:lsid:ipni.org:names:228375-1
WFO ID wfo-0000026913
COL ID 6NTLD
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Laennecia pinnatifida Laennecia filaginoides Erigeron strictus Conyza filaginoides Heterochaeta stricta