Weed Science & Agronomy
INRA-Dijon
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Unité de Malherbologie & Agronomie Weed Science & Agronomy INRA-Dijon |
Bayer Code : gaspa
Synonym(s) of Sc. name:
Classification: Compositae, Dicotyledonous
Common name: gallant soldier
Synonym(s) of Common name:
Name per country: DE : Kleinblütiges Franzosenkraut ; ES : soldado galante ; FR : galinsoga à petites fleurs ; IT : galinsoga comune ; PT : erva-da-moda ; EN : gallant soldier ; NL : kaal knopkruid ; DK : håret kortstråle
Biological type: Annual
.
- Cotyledons cordate at the apex.
- Leaves entire, elliptic-ovate, regularly toothed.
- Height: 20-70 cm. Plant mostly branched at base.
- Stem glabrous or sparcely hairy.
- Leaves opposite, pinnately divided, with appressed hairs on veins and narrow-toothed lobes.
- Flowers in heads: ray -florets white, with a short ligule, a marked tube, female. Disk-florets yellow, tubular. Short-peduncled inflorescence axillary or terminal on forked branches, solitary on pedicels with small glands. Involucral bracts on 2 rows, green, glabrous.
- Fruit : Central achenes circa 1 mm, ovate, black, covered with short white bristles, pappus as long as the fruit, with 8-20 silvery and cut-margined scales. Marginal achenes smooth, 3-blunt-angled, without pappus.
- Plant native of South America, cold sensitive killed by the first autumnal night frost. Vector of the cucumber mosaic virus and of the infectious yellowing of asters.
- Risk of confusion with Galinsoga quadriradiata Ruiz et Pav. (which is differentiated by it's spreading hairs).
- Biological type: Annual.
Mistake with: Galinsoga quadriradiata
Ecological profile (click on flags):
Rare
Present
Present
Present
Rare
Present
Present
