Porotrichum madagassumKiaer ex Besch.

WFO wfo-0001170546 Accepted WFO 2026-06 8 photographs CC0 / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Porotrichum madagassum, photographed by Di Turner
fig. a Di Turner, CC0 1.0 / 2021-02-17 / obs. 133561222
Porotrichum madagassum, photographed by Nicola van Berkel
fig. b Nicola van Berkel, CC BY-SA 4.0 / obs. 111951685
Porotrichum madagassum, photographed by Nicola van Berkel
fig. c Nicola van Berkel, CC BY-SA 4.0 / obs. 111740582
Porotrichum madagassum, photographed by Nicola van Berkel
fig. d Nicola van Berkel, CC BY-SA 4.0 / obs. 111739989
Porotrichum madagassum, photographed by Di Turner
fig. e Di Turner, CC0 1.0 / obs. 111951788
Porotrichum madagassum, photographed by Nicola van Berkel
fig. f Nicola van Berkel, CC BY-SA 4.0 / obs. 112925786
Porotrichum madagassum, photographed by Nicola van Berkel
fig. g Nicola van Berkel, CC BY-SA 4.0 / obs. 15482091
Porotrichum madagassum, photographed by Nicola van Berkel
fig. h Nicola van Berkel, CC BY-SA 4.0 / obs. 166253710

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.

The specimen a real sheet, in a real collection

Herbarium
The New York Botanical Garden
Accession
04449178
Filed as
Porotrichum madagassum Kiaer ex Besch.
Det. by
not recorded on this sheet
Collected
not recorded
Origin
not recorded
The sheet
View the digitised specimen (CC BY 4.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Also published as 12 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.

  • Porothamnium pennaefrondeum (Müll.Hal.) Cardot
  • Porothamnium penniforme M.Fleisch.
  • Porotrichodendron madagassum (Kiaer ex Besch.) S.Olsson, Enroth & D.Quandt
  • Porotrichum chauvetii (Renauld & Cardot) Broth.
  • Porotrichum pennaefrondeum Müll.Hal.
  • Porotrichum penniforme Müll.Hal. ex Renauld
  • Porotrichum penniforme var. chauvetii Renauld & Cardot
  • Porotrichum ruficaule Müll.Hal.
  • Thamnium madagassum (Kiaer ex Besch.) Kindb.
  • Thamnium madagassum subsp. chauvetii (Renauld & Cardot) Kindb.
  • Thamnium pennaefrondeum (Müll.Hal.) Kindb.
  • Thamnium ruficaule (Müll.Hal.) Kindb.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

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. It has no native range either: Kew's checklist does not cover this taxon.