Questions? AskAuckland
  

NZ Plants


Juvenile and adult fronds

In some species, fronds formed by a juvenile fern are very different to those formed when the same plant reaches maturity. Because plants of different ages often grow together there is often a confusing mixture of leaf forms.

Fonds from juvenile (right) and adult (left) plants

Transition from juvenile (right) to adult (left) fronds
(photo, I MacDonald)

Microsorum scandens, mokimoki, fragrant fern - The fronds from juvenile plants are undivided, those of the mature plants are pinnate and plants of intermediate age are a combination of both. 

More on this group of ferns 


Fonds from juvenile (right) and adult (left) plants

Fertile frond (left), sterile frond (middle) and juvenile frond (right)
(photo, I MacDonald)

Blechnum filaforme, thread fern - Fronds from both juvenile and mature plants are divided into leaflets but these differ in size and shape.

More on this group of ferns 

Fronds of the juvenile plant

Juvenile plant with fronds
(photo, L Jensen)

Arthropteris tenella, jointed fern - Fronds from juvenile plants are undivided or partially divided into small, round leaflets.

More on this fern 

Fronds of the mature plant

Mature plant with fronds
(photo, L Jensen)

Arthropteris tenella - Fronds from mature plants are much larger and entirely pinnate with numerous long, narrow leaflets.