Ischaemum muticumL.

Plate 1 figs. a–h · 8 separate observations

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

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.

Native range 30 botanical countries

Not drawn on the map: Cocos (Keeling) Is.. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

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 90 observations

It is not found anywhere that gets close to freezing. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 90 research-grade observations of Ischaemum muticum 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 18 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.

• Agrostis javanica Houtt.
• Andropogon cymbachne Hack.
• Andropogon polymorphus Steud.
• Andropogon relictus Steud.
• Andropogon repens Steud.
• Cymbachne alata P.Beauv.
• Cymbachne ciliata Retz.
• Cymbachne ciliata var. toumodiensis Roberty
• Ischaemum glabratum J.Presl
• Ischaemum involutum Labill. ex Kunth
• Ischaemum muticum var. aristuliferum Fosberg & Sachet
• Ischaemum muticum var. muticum
• Ischaemum muticum var. repens (Roxb.) Hack. ex Ridl.
• Ischaemum muticum var. srilankense Davidse
• Ischaemum repens Roxb.
• Rottboellia cymbachne Willd.
• Tripsacum ischaemum Raspail
• Tripsacum muticum (L.) Raspail

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.
3. USDA PLANTS Database. common name, checklist symbol ISMU. public domain. Retrieved 2026-07-13.
4. 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.