Species are listed in the left-hand column by letters, which also appear in the column headings. The column headed by an asterisk denotes those species which have hybrid origins, and gives the number of that hybrid.
Table of diploid Polypodium species
|
|
a. |
b. |
c. |
d. |
e. |
f. |
a. Polypodium amorphum |
Suksdorf |
|
|
|
|
2 |
3 |
b. Polypodium appalachianum |
Haufler & Windham |
|
|
|
|
5 |
4 |
c. Polypodium californicum |
Kaulfuss |
|
|
|
|
1 |
|
d. Polypodium cambricum* |
Linnaeus |
|
|
|
|
|
|
e. Polypodium glycyrrhiza |
D. C. Eaton |
2 |
5 |
1 |
|
|
|
f. Polypodium sibiricum |
Siplivinskij |
3 |
4 |
|
|
|
|
*also see #16
Primary hybrids: These are all tetraploids
1. Polypodium calirhiza S. A. Whitmore & A. R. Smith: P. glycyrrhiza x P. californicum (see #11)
2. Polypodium hesperium Maxon: P. glycyrrhiza x P. amorphum (see #11)
3. Polypodium saximontanum Windham: P. amorphum x P. sibiricum
4. Polypodium virginianum Linnaeus: P. appalachianum x P. sibiricum (see #13)
5. Polypodium vulgare Linnaeus: P. appalachianum x P. glycyrrhiza (see #12, #14, #15)
Secondary hybrids
11. Polypodium xaztecum Windham & Yatsk.: P. hesperium x ?P. calirhiza: allotetraploid
12. Polypodium xfont-queri Rothm. : P. cambricum x P. vulgare: ?allotriploid (see #14)
13. Polypodium xincognitum Cusick: P. appalachianum x P. virginianum: allotriploid
14. Polypodium interjectum Shivas: P. cambricum x P. vulgare: hexaploid (see #12, #15, #16)
15. Polypodium xmantoniae (Rothm.) Shivas: P. interjectum x P. vulgare: allopentaploid
16. Polypodium xshivasiae Rothm. : P. cambricum x P. interjectum, allotetraploid