Hybrids of Northern Temperate Cystopteris Species
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 Cystopteris species
| Species |
|
a. |
b. |
c. |
d. |
| a. Cystopteris
bulbifera* |
(Linnaeus)
Bernhardi |
|
|
2
|
4
|
| b. Cystopteris
"hemifragilis"# |
|
|
|
3
|
1
|
| c. Cystopteris
protrusa** |
(Weatherby)
Blasdell |
2
|
3
|
|
|
| d. Cystopteris
reevesiana*** |
Lellinger |
4
|
1
|
|
|
#"hemifragilis" is a provisional name for an apparently extinct species with no known fossil record
*also see 11, 12, 20
**also see 15, 17
***also see 16, 19
Primary hybrids (all tetraploid species):
- 1. Cystopteris fragilis (Linnaeus) Bernhardi: C. "hemifragilis" X C. reevesiana; also see 12, 13, 14, 18, 19, 21
- 2. Cystopteris tennesseensis Shaver: C. bulbifera X C. protrusa; also see 13, 15, 20
- 3. Cystopteris tenuis (Michaux) Desvaux: C. "hemifragilis" X C. protrusa; also see 11, 13, 14, 17
- 4. Cystopteris utahensis Windham & Haufler: C. reevesiana X C. bulbifera; also see 16
Secondary hybrids:
- 11. Cystopteris Xillinoensis R.C. Moran: C. bulbifera X C. tenuis; allotriploid
- 12. Cystopteris laurentiana (Weatherby) Blasdell: C. bulbifera X C. fragilis; allohexaploid: see also 18
- 13. Cystopteris Xwagneri R.C. Moran: C. tennesseensis X C. tenuis; allo-allotetraploid
- 14. Unnamed hybrid: C. fragilis X C. tenuis; allo-allotetraploid
- 15. Unnamed hybrid: C. protrusa X C. tennesseensis; allotriploid
- 16. Unnamed hybrid: C. reevesiana X C. utahensis; allotriploid
- 17. Unnamed hybrid: C. protrusa X C. tenuis: allotriploid
- 18. Unnamed hybrid: C. fragilis X C. laurentiana: allopentaploid
- 19. Unnamed hybrid: C. fragilis X C. reevesiana: allotriploid
- 20. Unnamed hybrid: C. bulbifera X C. tennesseensis: allotriploid
Notes: Some authors treat Cystopteris dickeana as a synonym of C. fragilis, but it may be a separate species;
there is a supposed hybrid reported between the two, C. Xmontserratii.
Cystopteris Xchristii Hahne is a hybrid between C. fragilis X C. myrrhidifolia?
Cystopteris montana (Lam.) Bernh. ex Desv. may be a parent of the European species Cystopteris alpina (Jacq.) Desv.