dots the bare damp soil in sunny sites

Size
Width: 2–5 cm
Lifespan
1–3 years
Diet
Photosynthetic. Obtains nutrients from damp soil. Requires consistent moisture and good light. Grows on stream banks and disturbed ground.
Habitat
Open, sunny sites with bare damp soil or disturbed earth, often along stream margins or in garden beds where vegetation is sparse.
Range
Found throughout the North and South Islands on damp soil, stream banks, and disturbed ground in open, sunny locations. Most common in lowland areas with consistent moisture.
Endemism
Native
Main Threats
None significant but under-recorded. Localised threats include land development, wetland drainage, and climate change reducing soil moisture.
Population
Not Threatened, though easily overlooked due to its irregular, blob-like appearance. Likely under-recorded in New Zealand.
Conservation Status
Not Threatened
Human Risk
harmless
Handling Note
common hornwort, safe to handle
Conservation Note
Native hornwort; not assessed by NZTCS as bryophytes are generally outside the scope of current threat classifications.
Te Ao Māori
No recorded Māori name distinguishes the phymatoceros hornwort from other hornworts. Hornworts were generally called "pūkohu" (mosses and lichens). The strange, blob-like, wrinkled cushions on damp soil would have been noticed. They looked like the lumps of the earth. Like the blisters of the ground. But no distinct name survives. This hornwort was not used as a medicine or a dye. It was too weird. Too irregular. Too easy to overlook. It was simply part of the forest.
The soil is damp. The light is good. The hornwort sits. Phymatoceros hornwort looks like it was put together by someone who had never seen a plant before. A hornwort that embraces its own weirdness. The thallus is not flat and rosette-forming like other hornworts. It is thick, wrinkled, and blob-like. A small, green, bumpy cushion. Resembling a piece of chewed gum or a deformed potato. The surface is rough and lumpy. With no clear shape or pattern. A plant that looks like a mistake. From this irregular base, sporadic, short, dark green horns rise at odd angles. Some straight. Some curved. Some leaning to one side. They scatter across the thallus like an afterthought. As if the plant forgot where it was supposed to put them. It is the hornwort of haphazard design. Assembled without a plan by a committee that could not agree. A plant that cannot decide where to put its horns. This is the strangest-looking hornwort in New Zealand. The blob-like, wrinkled thallus is unlike any other. The sporadic, irregular horns give it a chaotic, unfinished appearance. It embraces its own weirdness rather than apologising for it. The thallus is thick and fleshy. Pale green to yellowish-green. Often with a brownish tint. Grows 1 to 3 centimetres across. The sporophytes are short. Only 1 to 2 centimetres tall. Emerging at irregular intervals. Reproduction happens by spores released from those horn-like capsules. To find phymatoceros hornwort is to spot a small, green, blob-like cushion on damp soil. It looks like a piece of chewed gum. The damp soil is lumpy. The hornwort sits. Green and wrinkled. Horns rising at odd angles. It does not know it is strange. It does not know it looks like a mistake. It just grows. That is what hornworts do. Populations are not threatened. Though easily overlooked due to its irregular, blob-like appearance. Likely under-recorded in New Zealand. Localised threats include land development. Wetland drainage. Climate change reducing soil moisture.