Clavulinopsis fusiformis

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***Clavulinopsis fusiformis***, commonly known as **golden spindles**, **spindle-shaped yellow coral**, or **spindle-shaped fairy club**, is a species of coral fungus in the family Clavariaceae.

## Taxonomy

The species was first described as *Clavaria fusiformis* by English botanist James Sowerby in 1799, from collections made in Hampstead Heath in London. Elias Fries called it a variety of *Clavaria inaequalis* in 1828. It was transferred to *Clavulinopsis* by E.J.H. Corner in 1950. Ronald H. Petersen transferred it to *Ramariopsis* in 1978.

The specific epithet *fusiformis*, derived from Latin, means "spindle-shaped". It is commonly known variously as "golden spindles", "spindle-shaped yellow coral", or "spindle-shaped fairy club".

## Description

The fruit bodies take the shape of bright yellow, thin clubs Template:Convert tall, with narrow, pointed tips. The firm and brittle flesh, also yellow, becomes hollow in maturity. The spores are broadly ellipsoid to roughly spherical, smooth, with dimensions of 5–9 by 4.5–8.5 µm. They have an apiculus that measures 1–2 µm long, and either a large oil droplet or several oil droplets. The basidia (spore-bearing cell) are club-shaped, measure 40–65 by 6–9 µm with a long cylindrical base that is 1.5–2.5 µm wide. It has a clamp connection at the base. Most basidia are four-spored, although there are occasionally two- and three-spored versions. The flesh comprises both inflated hyphae up to 12 µm, and narrow hyphae up to 4  µm. It has been described as both edible and inedible in field guides. Fruit bodies are commonly collected and consumed in Nepal, where it is known locally as *Kesari chyau*.

### Similar species

*Clavaria fragilis* is similar in size and morphology, but is white. *Clavaria amoenoides* is similar in size, and like *Clavulinopsis fusiformis*, grows in dense clusters, but it is much rarer. It can be readily distinguished from *C. fusiformis* by microscopic examination, as it has inflated hyphae that lack clamp connections. *Clavulinopsis laeticolor* is similar in color and form, but smaller, up to Template:Convert tall, lacks pointed tips, and tends to grow singly, scattered, or in loose groups. Similarly, *C. helvola* and *C. luteoalba* have similar coloration, but are smaller and do not typically grow in clusters.

## Habitat and distribution

*Clavulinopsis fusiformis* is a saprobic species. Fruit bodies grow on the ground in loose to dense clusters and scattered troops in grassy areas and among moss. In Asia, it has been reported from Iran, China, Nepal, and Japan. It is also found in Europe and North America. In China it is one of the dominant macrofungal species found in *Fargesia spathacea*-dominated community forest at an elevation of Template:Convert.

## Chemistry

The extract of *Clavulinopsis fusiformis* contains anti-B red blood cell agglutinin.

## References

1. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Sowerby 1799`
2. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Fries 1828`
3. ↑ 3.0 3.1 3.2 Cite error: Invalid `<ref>` tag; no text was provided for refs named `Corner 1950`
4. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Petersen 1978`
5. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Konstantinidis 2005`
6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 Cite error: Invalid `<ref>` tag; no text was provided for refs named `Roberts 2011`
7. ↑ 7.0 7.1 Cite error: Invalid `<ref>` tag; no text was provided for refs named `Bessette 1997`
8. ↑ 8.0 8.1 Cite error: Invalid `<ref>` tag; no text was provided for refs named `Tylutki II 1987`
9. ↑ 9.0 9.1 Cite error: Invalid `<ref>` tag; no text was provided for refs named `Christensen 2008`
10. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Adhikari 2005`
11. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Roberts 2008`
12. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Davis 2012`
13. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Saber 1989`
14. ↑ 14.0 14.1 Cite error: Invalid `<ref>` tag; no text was provided for refs named `Zhang 2010`
15. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Furukuwa 1995`

## External links

* Template:IndexFungorum

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