Bolivian coriander
Porophyllum ruderale is an erect, usually rather sparsely branched annual plant growing 15 - 150cm tall
Queensland Herbarium has four (4) specimens, three (3) from far Northern Queensland and one (1) from Mt Coot-tha Reserve. Recently (2021) another two (2) incursions have been identified at Pullenvale and Mt Gravatt Lookout Reserve
Often intentionally cultivated. In the natural environment it is a weed of disturbed soils, it prefers damp moist areas in rocky slopes and gullies
Usually rather sparsely branched annual plant can be more compact when growing in full sun
Porophyllum ruderale is an invasive species of open agro-systems. Its high dispersal capacity and its intrinsic biological capabilities allows it to quickly take hold when introduced into the environment. Effective management of the species requires its destruction before the flowering stage.
Annual herb, stems erect, 0.15-1.5 m tall, often much branched above slender blueish green leaves. Leaves can be opposite or alternately arranged, leaves can vary from egg shaped (ovate) to upside down egg shaped (obovate) to elliptic with slightly scalloped (crenulate) margins. Leaves are aromatic when crushed.
Green, yellow or purplish; disk florets only; flower heads few to many; bracts surrounding heads narrowly linear with translucent oil glands; fruit is a cypsela.
Reproduces via seed, dispersed by wind and water or intentionally cultivated
There are 2 sub-species in Porophyllum ruderale;
Porophyllum ruderale ssp. macrocephalum, Yerba Porosa; (AZ, NM, TX);
Porophyllum ruderale ssp. ruderale, Yerba Porosa, (Porto Rico, Virgin Islands)