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- Cystopteris_protrusa abstract "Cystopteris protrusa is a common fern of eastern North America. Throughout much of its range, it is the most common Cystopteris. It is commonly known as the lowland brittle fern or lowland fragile fern. The specific name, protrusa, refers to the fact that the rhizome protrudes a short distance beyond the current year's fronds to form the following year's leaf buds. This protrusion is a positive diagnostic in the field. Sori are round and covered in a bladder-like indusium.Unlike most species of this genus, this fern is exclusively terrestrial, often forming large, dense colonies. It is also largely a spring ephemeral. Some fronds may remain by late summer, but most have disappeared.C. protrusa was originally considered only a variety of Cystopteris fragilis. However, it is now known that this is a diploid species, while C. fragilis (ss) is a polyploid species of hybrid origin. C. protrusa is a parent of the hybrid species Cystopteris tennesseensis and Cystopteris tenuis. Also see Cystopteris hybrid complex.".
- Cystopteris_protrusa binomialAuthority Charles_Alfred_Weatherby.
- Cystopteris_protrusa class Leptosporangiate_fern.
- Cystopteris_protrusa division Fern.
- Cystopteris_protrusa family Dryopteridaceae.
- Cystopteris_protrusa genus Cystopteris.
- Cystopteris_protrusa kingdom Plant.
- Cystopteris_protrusa order Polypodiales.
- Cystopteris_protrusa thumbnail Cystopteris_protrusa-fronds.gif?width=300.
- Cystopteris_protrusa wikiPageID "25231910".
- Cystopteris_protrusa wikiPageRevisionID "603402397".
- Cystopteris_protrusa binomial "Cystopteris protrusa".
- Cystopteris_protrusa binomialAuthority "Blasdell".
- Cystopteris_protrusa classis Leptosporangiate_fern.
- Cystopteris_protrusa divisio Fern.
- Cystopteris_protrusa familia Dryopteridaceae.
- Cystopteris_protrusa genus "Cystopteris".
- Cystopteris_protrusa hasPhotoCollection Cystopteris_protrusa.
- Cystopteris_protrusa imageCaption "C. protrusa fronds".
- Cystopteris_protrusa ordo Polypodiales.
- Cystopteris_protrusa regnum "Plantae".
- Cystopteris_protrusa species "C. protrusa".
- Cystopteris_protrusa title "Lowland fragile fern".
- Cystopteris_protrusa subject Category:Cystopteris.
- Cystopteris_protrusa subject Category:Fern_species.
- Cystopteris_protrusa subject Category:Ferns_of_Delaware.
- Cystopteris_protrusa subject Category:Ferns_of_the_United_States.
- Cystopteris_protrusa subject Category:Flora_of_Kentucky.
- Cystopteris_protrusa subject Category:Flora_of_Missouri.
- Cystopteris_protrusa subject Category:Flora_of_Ohio.
- Cystopteris_protrusa subject Category:Flora_of_Pennsylvania.
- Cystopteris_protrusa subject Category:Flora_of_West_Virginia.
- Cystopteris_protrusa subject Category:Plants_described_in_1935.
- Cystopteris_protrusa type Fern111545714.
- Cystopteris_protrusa type FernsOfTheUnitedStates.
- Cystopteris_protrusa type LivingThing100004258.
- Cystopteris_protrusa type Object100002684.
- Cystopteris_protrusa type Organism100004475.
- Cystopteris_protrusa type PhysicalEntity100001930.
- Cystopteris_protrusa type Plant100017222.
- Cystopteris_protrusa type Pteridophyte111545524.
- Cystopteris_protrusa type VascularPlant113083586.
- Cystopteris_protrusa type Whole100003553.
- Cystopteris_protrusa type Eukaryote.
- Cystopteris_protrusa type Fern.
- Cystopteris_protrusa type Plant.
- Cystopteris_protrusa type Species.
- Cystopteris_protrusa type Fern.
- Cystopteris_protrusa type Organism.
- Cystopteris_protrusa comment "Cystopteris protrusa is a common fern of eastern North America. Throughout much of its range, it is the most common Cystopteris. It is commonly known as the lowland brittle fern or lowland fragile fern. The specific name, protrusa, refers to the fact that the rhizome protrudes a short distance beyond the current year's fronds to form the following year's leaf buds. This protrusion is a positive diagnostic in the field.".
- Cystopteris_protrusa label "Cystopteris protrusa".
- Cystopteris_protrusa sameAs 3BVRZ.
- Cystopteris_protrusa sameAs m.09g7wtt.
- Cystopteris_protrusa sameAs Q5201283.
- Cystopteris_protrusa sameAs Q5201283.
- Cystopteris_protrusa sameAs Cystopteris_protrusa.
- Cystopteris_protrusa wasDerivedFrom Cystopteris_protrusa?oldid=603402397.
- Cystopteris_protrusa depiction Cystopteris_protrusa-fronds.gif.
- Cystopteris_protrusa isPrimaryTopicOf Cystopteris_protrusa.