Cinnamon Bracket Identification Guide

The First Impression and the Setting

You usually meet Cinnamon Bracket at chest height rather than on the ground. The setting is a hedge, a wood edge or an open broadleaf stand where a dead branch is still attached to a living oak, birch or beech, or where such a branch has recently come down and is lying across the litter. Along one side of that branch sits a row of soft brackets, sometimes single, often three or four in a line, occasionally fusing into an undulating shelf.

The impression is of something soft and warm-coloured: a cushion rather than a shelf, cinnamon to pale rusty ochre, with a thick rounded edge that looks slightly swollen. Push a fingertip into a fresh one and it dents like a damp sponge and springs back. That combination of ochre colour and squeezable texture on hardwood is the starting point.

Reading the Bracket

Individual brackets are typically three to twelve centimetres across and one to five centimetres thick at the attachment. They are semicircular, fan-shaped or almost cushion-like, broadly attached to the wood with no stalk at all. On the undersides of logs they often spread as an effused-reflexed crust with only a narrow turned-up lip.

The upper surface is finely velvety or suede-like when young, becoming smooth, matt and slightly uneven with age. It is faintly lumpy rather than truly zoned, though weak concentric banding sometimes shows. Colour runs from ochre and cinnamon-buff to pale rusty-brown or a soft salmon-ochre; the growing margin is thick, blunt and usually a shade paler and more yellow.

Dried material is a different animal: it shrinks, hardens, darkens to a duller brown and often cracks, becoming surprisingly light in the hand. Old blackened remains can persist on the branch through winter.

The Pore Surface

Turn the branch or crouch under the bracket. The fertile surface is poroid, with small angular pores at roughly two to four per millimetre, fairly regular, and the same cinnamon-ochre as the rest of the fungus. They darken a little where rubbed or pressed, but there is no dramatic bruising.

The tube layer is two to eight millimetres deep and single - this is an annual fungus that does not build stacked layers year on year. Crucially, the tubes are exactly the same colour and texture as the tissue above them, and a vertical cut shows no dark separating line between context and tubes. That homogeneity is a real character, because several of the tough brown brackets it might be confused with show a distinct dark line or a duplex structure in section.

Section and Texture

Cut a fresh bracket in half from the attachment outward. The tissue is soft, watery and spongy - you can compress it between finger and thumb and squeeze out moisture - and it is homogeneous ochre to pale cinnamon throughout, without zones, without a crust and without a darker core.

As it dries the same tissue becomes light, brittle and slightly corky, and old specimens crumble.

There is no latex, no strong bruising and no marked colour change on cutting beyond a slight darkening where moisture escapes. The odour is weak and vaguely sweetish or faintly fungal.

The Chemical Test That Settles It

Cinnamon Bracket gives one of the most spectacular macrochemical reactions of any polypore. Touch a drop of potassium hydroxide solution to the tissue, the pore surface or the cap surface and the spot turns an intense violet to lilac-purple, essentially instantly. Household ammonia gives a similar, slightly slower reaction. Smear a fragment of the bracket on white paper and add the drop there and the purple bleeds outward across the fibres.

No other soft ochre bracket on broadleaf wood does this so strongly or so fast, and a positive result in the field is effectively the end of the identification. It is worth carrying a small dropper bottle for this species alone.

Taking a Spore Print

Choose a fresh bracket with a pale, actively growing margin, cut it free with a slice of wood if possible, and prop it pore-side down a few millimetres above dark card inside a closed box with a damp tissue. Leave it overnight somewhere cool.

The deposit is white. Under the microscope the spores are small, smooth, cylindric-ellipsoid and hyaline, but the field worker rarely needs to go that far given the chemical test.

Substrate and Season

The substrate is broadleaf wood: dead branches still attached in the canopy, recently fallen limbs, and standing dead stems. Oak, birch, beech, hazel, ash and willow are all frequent hosts, with occasional records on conifers. It prefers wood that has died fairly recently and still has some structural integrity rather than soft, crumbling, well-rotted material.

Ecologically it is a white-rot decayer, breaking down lignin and leaving the wood pale, fibrous and stringy.

Fruit bodies are annual and appear from summer through late autumn, with the dried and blackened remains persisting into winter, so a branch can be identified out of season by finding old brackets alongside fresh ones the following year.

Separating the Look-alikes

Hapalopilus croceus is the close relative: much larger, bright orange to rusty-orange, restricted mainly to ancient oaks, and its potassium hydroxide reaction is a deep blood-red or crimson rather than violet.

Phaeolus schweinitzii is far bigger, grows at the base of conifers or from buried conifer roots, has a rusty-brown surface with a bright yellow growing margin, large irregular labyrinthine pores and dark brown tissue, and blackens rather than purpling with alkali.

Inonotus and Fuscoporia species have tough, fibrous, shining rusty-brown tissue, frequently with setae in the tubes, are often hairy or crusted above, and turn black with alkali. Several are perennial or persistent and much harder in the hand.

Postia and Oligoporus species are soft like Hapalopilus but are white, cream or bluish-tinted with white pores and white tissue.

Aurantiporus and Tyromyces species are soft, white to pinkish-cream, and lack the ochre-cinnamon tone entirely.

Bjerkandera adusta is thin, with a grey to grey-black pore surface that darkens on handling, and a distinct thin dark line above the tubes in section.

Trametes species are thin, tough, leathery and concentrically zoned above, with white pores and white tissue.

Gloeophyllum species are brown, tough, and have a gill-like or maze-like fertile surface rather than round pores.

Working Checklist

Soft, squeezable, watery bracket on dead broadleaf wood; sessile and broadly attached; suede-like ochre to cinnamon upper surface; small angular concolorous pores at two to four per millimetre; homogeneous ochre section with no dark line; white spore deposit; and an instant intense violet reaction to potassium hydroxide on any part.