Cosmos peucedanifolius

Plate 1 figs. a–c · 3 separate observations

Cosmos peucedanifolius, photographed by Naturalist Tours — fig. b Naturalist Tours, CC0 1.0 / obs. 118171928

Cosmos peucedanifolius, photographed by Carla Florencia Rodríguez — fig. c Carla Florencia Rodríguez, CC BY 4.0 / obs. 119445367

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 3 botanical countries

Native distribution of Cosmos peucedanifolius, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.

Region	TDWG code	Continent
Argentina Northwest	AGW	SOUTHERN AMERICA
Bolivia	BOL
Peru	PER

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Where it actually grows measured, from 125 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	-2.2 °C	3.0 °C	7.5 °C
Warmest month, mean daily high	12.4 °C	14.9 °C	22.9 °C
Annual rainfall	833 mm	1,415 mm	2,666 mm
Rainfall in the driest quarter	16 mm	57 mm	215 mm

It is found where winters bring light frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 125 research-grade observations of Cosmos peucedanifolius that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 15 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

Bidens peucedanifolia (Wedd.) Kuntze
Bidens peucedanifolia var. bipinnatisecta Kuntze
Bidens peucedanifolia var. cochabambensis Kuntze
Bidens peucedanifolia var. peucedanifolia
Bidens peucedanifolia var. soratensis Kuntze
Bidens peucedanifolia var. tiraquensis Kuntze
Bidens peucedanifolius (Wedd.) Kuntze
Bidens peucedanifolius var. peucedanifolius
Bidens peucedanifolius var. soratensis Kuntze
Bidens pulcherrimus Sch.Bip.
Cosmos integrifolius Wedd.
Cosmos marginatus Klatt
Cosmos peucedanifolius var. bipinnatisectus (Kuntze) Sherff
Cosmos pulcherrimus Sch.Bip.
Cosmos subpubescens Wedd.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.