According to this its,Centennial Characteristics : Pungent, Floral, Citrus
Centennial Hops
Characteristics
Centennial (once called CFJ90) is fast becoming one of the defining hops of the American Ale (APA & IPA) style. One of the "C" hops, along with Cascade, Chinook, and Columbus. Centennial imparts a pungent, citrus-like flavor and aroma. This particular "C" hop, however, is good when you are not looking to impart quite the floral aromas that you might find in Cascade.
Bitterness is between 9 to 12% AAU, making this a good dual purpose hop variety for either bittering or flavor/aroma additions.
If you're a fan of beers like Stone IPA or Bell's Two Hearted IPA - this is the hop for you my friend.
Specifications
Typical Use : Bitterness/Flavor/Aroma
Alpha Acid : 9 to 12% AAU
Origination : USA
Characteristics : Pungent, Floral, Citrus
Styles : American Pale Ale, American IPA
Similar Hops : Cascade, Chinook, Columbus
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Citra is>>>>>> Characteristics : Citrusy
Citra Hops
Characteristics
Citra is a new moderately-high acid (10-12%) US hop variety releaset sometime in 2008. Citra is a cross between several hop varieties including Hallertau Mittelfreuh, U.s. Tettnanger, E.K. Goldings, and other unknown varieties.
The aroma is reported to be very fruity (citrus fruits especially.) Descriptors I have seen used include: grapefruit, lime, melon, gooseberry, lychee fruit.
I haven't been able to purchase Citra yet, so I do not have a recipe or any personal experience. I first found out about the Citra hop when reading about the Sierra Nevada Torpedo IPA. If you get your hands on this hop and get to brew with it, please let me know how it turns out.
Specifications
Typical Use : Multi Purposse Alpha Acid : 10 to 12% AAU
Origination : USA
Characteristics : Citrusy
Styles : I've only heard of this in IPA
Similar Hops : Sierra Nevada Torpedo IPA