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Found along forested trail next to small river. Low elevation.

Possibly other Etlingera species, but likely E. littoralis.

"E. littoralis can grow in different habitats, from lowland to high elevation. They grow along logging
roads, river banks, damp and humid shady places. They are also frequently found in secondary forests,
areas along jungle trails and in secondary and primary forests. Some species can be fully exposed to the
sun"

Potentially S. glomeratum? Heads seem to be approx 1.6cm or less.

Staminate heads 1(--2); fruiting heads 1.2--1.6(--2) cm diam.; fruit beak 1.5--2 mm.

Sparganium glomeratum

Staminate heads 3--7(--10); fruiting heads 1.6--3.5 cm diam.; fruit beak 2--4.5 mm.

Sparganium emersum

T. biforme: hardwood species. Somewhat larger than most others.

T. abietinum most common but only on conifers.

T. subchartaceum only on Populus spp. and does not develop conspicuous tooth-like pores on underside.

T. fuscoviolaceum: "has a lower surface described as bearing short gill-like sections which become tooth-like, resulting in lines or rows of teeth."

T. laricinum: only on Larix spp.

Thallus Appearance:

L. chloromelum: The thallus is greenish gray to medium gray, heavily wrinkled longitudinally, and not isidiate (lacking isidia).
L. phyllocarpum: The thallus is medium gray to dark gray to almost black, heavily lamellate longitudinally, with undulating, crisp lobes and lamellae on the upper surface.
Apothecia:

L. chloromelum: Apothecia are common, often marginal, with a brown to red-brown concave to plane disc and a thalline margin that is verrucose or heavily periclinally wrinkled.
L. phyllocarpum: Apothecia are common, submarginal towards lobe tips, with a brown to red-brown concave to plane disc and a thalline margin that is entire or lobulate, heavily wrinkled.
Surface Texture:

L. chloromelum: The upper surface is heavily wrinkled longitudinally, and the thallus is not isidiate.
L. phyllocarpum: The upper surface has lamellae, and the lobes are undulating and crisp. The thallus is not isidiate.
Color:

L. chloromelum: The upper surface is greenish gray to medium gray.
L. phyllocarpum: The upper surface is medium gray to dark gray to almost black.
Apothecial Margin:

L. chloromelum: Thalline margin of apothecia is granulose.
L. phyllocarpum: Thalline margin of apothecia is entire or lobulate and heavily wrinkled.
Additional Identifying Features:

L. chloromelum: It is rare, occurring on bark of soft-barked oaks at intermediate elevations. It is mostly subtropical to warm temperate, found in North and South America.
L. phyllocarpum: It is common on bark of soft-barked oaks at intermediate elevations and has a pantropical and subtropical distribution, occurring in North and South America, Africa, Australasia, and Asia.