S’more Spores

It’s the time of year when plants get ready to go dormant here in North Carolina.

This means in addition to losing leaves, plants set seed or form spores.  This hopefully ensures another generation of plants.

This November is a little unusual because it has been so warm that we still have flowers blooming and bees buzzing.  I have even had second generation seeds germinate and flower this season.

I will take you on a tour of s’more spores.  Seeds will follow in another post.

Sensitive fern/Onoclea sensibilis sends up its own spores on a stick.  These are referred to as beads.

img_5715

Its fronds are sterile, i.e. do not produce spores.

img_5705

Chain fern/ Woodwardia areolata has a separate spore bearing structure, also.

img_5709

Its fronds do not produce spores either.

img_5698

The Japanese Holly fern/Cyrtomium falcatum has a sporadic spore arrangement.  No pun intended.

img_5710

Its fronds are evergreen.

img_5701

Here is one sorus from the Japanese Holly fern under the microscope.

20161106_135337.jpg

Stay tuned for seeds.

FLOWER

The Disappearing Fern

My first orders of business when I return from a trip are to check on the bunnies

img_5531

and then to tour my plants to check for any changes.

To my shock and horror, when I peered into the baby fern box

img_5510

my prized Dragon’s Tail fern/Aspleniaceae x Ebenoides was missing many fronds.

Not whole fronds. The midribs remained sticking out nakedly brown without the lovely green scales.

img_5508

Something had eaten the Dragon’s Tails down to the bones.

There were droppings left on the dish below.  Evidence.

img_5504

A hungry caterpillar was feasting on my favorite fern.

I searched the soil before examining each frond.

I found a small green snacker, but knew he was not large enough to produce the poop.

img_5503

Ah Ha!    Bad, Bad Larva Brown.  He and his little Green Sidekick were escorted outside.

Go pick on a bigger fern you bullies.

img_5507

I hope little Dragon’s Tail can recover from this shock.

FERN MAMA

Fern Fiddles

Baby fern fronds are called fiddleheads.

IMG_8195

They unfurl from the earth, unrolling and lengthening as they spread out their leaflets.

IMG_8197

A cross-section looks like that of a chambered nautilus.

IMG_8206

 

This fiddle is from one of my favorite ferns, the Japanese holly fern/Cyrtomium falcatum. 

IMG_6693

One reason I love this fern is its random arrangement of sori on the underside of the fronds.

IMG_6694IMG_6695

No nice little rows for this fern.

IMG_8263

When the fiddles unfurl, spring has sprung.

Wait for it…

Follow the Flower

 

 

 

 

My Favorite Fern

My favorite type of fern is the Autumn Fern, also known as the Japanese Shield Fern.

Autumn Ferns
Autumn Ferns

It is my favorite because it is lovely in fall and winter, when most of my other plants are dead or depressingly dormant.  It loves shade and moisture. It needs protection from wind to get this big without damage.

three-foot-long frond
three-foot-long frond

 

The fronds are bipinnate/twice-cut, which means there are two divisions of leaflets on the frond stem divisions. They are also triangular.

 

triangular shaped frond
triangular shaped frond

The sori are arranged in neat little rows along underside of the leaflets.

sori in rows
sori in rows

Its species name is Dryopteris erythrosora.   In Latin that means tree/fern/red/sorus.

A sorus is a packet of spores that looks like a rust spot this time of year.

Here are three sori under a microscope.  Each is a complicated system of catapults. The curled arms unfurl and sling the spores away from the parent plant.

empty sori
empty sori “catapults”

Fresh sori are light colored or transparent. These still contain spores.

wpid-20151120_112137.jpg

Spores are not seeds. They only have half the genetic material of the fern. These germinate into tiny “boy and girl” gametophytes,  which then get together and make the big “baby” sporophytes that we call ferns.

This ancient and strange life cycle is called “alternation of generations.”

I look at my ferns and feel a connection with prehistoric life.

Follow the FERN!