Sorocephalus crassifolius

{{Short description|Species of flowering plant}}

{{Speciesbox

| image =

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| status = CR

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Rebelo, A.G. |author2=Mtshali, H. |author3=Raimondo, D. |author4=Helme, N.A. |year=2020 |title=Sorocephalus crassifolius |volume=2020 |page=e.T113240273A185551451 |doi=10.2305/IUCN.UK.2020-3.RLTS.T113240273A185551451.en |access-date=19 August 2023}}

| genus = Sorocephalus

| species = crassifolius

| authority = Hutch.

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| synonyms =

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Sorocephalus crassifolius, the flowerless clusterhead, is a flowering shrub that belongs to the family Proteaceae.{{cite web |url= https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:706682-1 |title= Sorocephalus crassifolius Hutch. |author= |date=n.d. |website=Plants of the World Online |publisher=The Trustees of the Royal Botanic Gardens, Kew |access-date=January 3, 2025}}{{cite web |url= https://www.catalogueoflife.org/data/taxon/4YCRM |title= Sorocephalus crassifolius Hutch. |author= |date=n.d. |website=Catalogue of Life |publisher=Species 2000 |access-date=January 3, 2025}} It is part of the South African fynbos vegetation type. The plant is endemic to the Western Cape where it occurs on the Riviersonderendberge. The plants were last seen in flower in the 1980s. There are only fifteen plants left.

The shrub grows only {{Convert|80|cm|abbr=on}} tall, tends to spread and flowers from December to February. The plant sprouts again after a fire. The plant is bisexual and pollination takes place through the action of insects. Two months after the plant has flowered, the fruit ripens and the seeds fall to the ground where they are spread by ants. The plant grows at elevations of {{Convert|1280|–|1460|m|abbr=on}}.