Cystopteris bulbifera

Bulblet fern
Conservation status
	; Secure (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Aspleniineae
Family:	Cystopteridaceae
Genus:	Cystopteris
Species:	C. bulbifera
Binomial name
	Cystopteris bulbifera; (L.) Bernh.
Synonyms
	Aspidium bulbiferum (L.) Sw. ; Cystea bulbifera (L.) Watt ; Cystopteris atomaria C. Presl ; Filix bulbifera (L.) Underw. ; Polypodium bulbiferum L.;

Cystopteris bulbifera, with the common name bulblet fern, bulblet bladderfern, or bulblet fragile fern is a fern in the family Cystopteridaceae.

Distribution

The fern is native to eastern Canada, the Midwestern and Eastern United States, and two disjunct populations in the Southwestern United States.

It is found only on calcareous substrates such as limestone. It commonly festoons limestone cave openings. While most commonly found on vertical rock faces, it also grows in rocky scree.

Description

Cystopteris bulbifera is a low-growing rock fern with creeping stems and narrow elongate deltate fronds which grow to 75 cm (30 in). C. bulbifera is unusual among ferns in producing bulblets along the bottom of the fronds. This is one of the easiest Cystopteris species to identify.

Closeup of bulblet

Hybrids

This species is known to hybridize with Cystopteris fragilis, Cystopteris protrusa, Cystopteris reevesiana, and Cystopteris tenuis. Hybrids with C. fragilis have given rise to the allohexaploid species Cystopteris laurentiana. Hybrids with Cystopteris protrusa have given rise to the allotetraploid species Cystopteris tennesseensis. The hybrid with C. reevesiana has given rise to the allotetraploid species Cystopteris utahensis. The hybrid with C. tenuis is known as C. × illinoensis, an allotriploid. Also see Cystopteris hybrid complex.

References

^ "NatureServe Explorer 2.0 - Cystopteris bulbifera Bulblet Fern". explorer.natureserve.org. Retrieved 9 October 2020.
^ synonyms Tropicos.org. Missouri Botanical Garden. 24 Dec 2011

External links

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[1] "NatureServe Explorer 2.0 - Cystopteris bulbifera Bulblet Fern". explorer.natureserve.org. Retrieved 9 October 2020.

[2] synonyms Tropicos.org. Missouri Botanical Garden. 24 Dec 2011

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