TAXONOMY,
Caudiciforms in PPG I, 2016

 

Caudiciforms are not related, they just kind of look alike. The have been formed by nature within many different families. However, as these pages show, taxonomy changes through time.
With the DNA mapping, the latest system is PPG I for the spore-plants, just like APG IV 2016 for the Angiosperms; the flowering plants. The Gymnosperm; naked-seeds group is unchanged.
The Pteridophyte Phylogeny Group classification of 2016 (PPG I): Spore-plants covers the caudiciform members of the Equisetaceae, Isoetaceae, Marattiaceae, Polypodiaceae and Psilotaceae. They are found in their right place below.

CLADE CLASS SUBCLASS ORDER SUBORDER FAMILY
Tracheophytes -

Lycopodiopsida-

---

Lycopodiales --

---

Lycopodiaceae
   

I

Isoetales ---

---

Isoetaceae
   

I

Selaginellales --

---

Selaginellaceae
           
Euphyllophytes - Polypodiopsida - Equisetidae --- Equisetales ---

---

Equisetaceae
 

I

Ophioglossidae - Psilotales ---

---

Psilotaceae
 

I

I

Ophioglossales -

---

Ophioglossaceae
 

I

Marattiidae --- Marattiales ---

---

Marattiaceae
 

I

Polypodiidae --- Osmundales ---

---

Osmundaceae
   

I

Hymenophyllales-

---

Hymenophyllaceae
   

I

Gleicheniales ---

---

Dipteridaceae
   

I

 

I

Gleicheniaceae
   

I

 

I

Matoniaceae
   

I

Schizaeales ---

---

Anemiaceae
   

I

 

I

Lygodiaceae
   

I

 

I

Schizaeaceae
   

I

Salviniales ---

---

Marsileaceae
   

I

 

I

Salviniaceae
   

I

Cyatheales  ---

---

Cibotiaceae
   

I

 

I

Culcitaceae
   

I

 

I

Cyatheaceae
   

I

 

I

Dicksoniaceae
   

I

 

I

Loxsomataceae
   

I

 

I

Metaxyaceae
   

I

 

I

Plagiogyriaceae
   

I

 

I

Thyrsopteridaceae
   

I

Polypodiales --- Aspleniineae --- Aspleniaceae
       

I

Athyriaceae
       

I

Blechnaceae
       

I

Cystopteridaceae
       

I

Desmophlebiaceae
       

I

Diplaziopsidaceae
       

I

Hemidictyaceae
       

I

Onocleaceae
       

I

Rhachidosoraceae
       

I

Thelypteridaceae
       

I

Woodsiaceae
        Dennstaedtiineae- Dennstaedtiaceae
        Pteridineae --- Pteridaceae
        Polypodiineae --- Davalliaceae
       

I

Didymochlaenaceae
       

I

Dryopteridaceae
       

I

Hypodematiaceae
       

I

Lomariopsidaceae
       

I

Nephrolepidaceae
       

I

Oleandraceae
       

I

Polypodiaceae
       

I

Tectariaceae
        Lindsaeineae --- Cystodiaceae
       

I

Lonchitidaceae
       

I

Lindsaeaceae
        Saccolomatineae- Saccolomataceae