I found this:
USDA ACCESSION No.: 21499
SELECTION: no published information available
GENUS: humulus
SPECIES: lupulus
CULTIVAR: Zenith
PEDIGREE: no published information available
PRIMARY SITE USDA-OSU Hop Research Farm, East Farm, Corvallis, OR
ORIGIN: seedling selection from a cross made at Wye College,
England in the 1970s
DATE RECEIVED: spring 1987
METHOD RECEIVED: rhizomes
AVAILBILITY: no restrictions, commercial variety
REFERENCES: Neve, R.A., and P. Darby. Wye College Annual Report for
Hop Research, 1983, page 39.
Neve, R.A. Hops. Chapman and Hall. London, New York
1991.
Various USDA Annual Reports for Hop Research starting in
1987.
MATURITY: medium early
LEAF COLOR: green
SEX: female
DISEASES: Downy mildew: resistant
Powdery mildew: resistant
Verticillium Wilt: susceptible
Viruses: Free of all major hop viruses when received
VIGOR: fair to good
YIELD: fair to poor in USDA test plots at Corvallis, good in
England.
SIDE ARM LENGTH: 12 to 20 inches
ALPHA ACIDS: 9 to 11%
BETA ACIDS: 3%
COHUMULONE: 25%
STORAGE STABILITY: very good, retained 82% of original alpha acids after
6 months room temperature storage
OIL: 1.76 ml/100 g. Humulene 18.4%; caryophyllene 6.9%
Myrcene 52.3%; farnesene trace. H/C ratio = 3.24
MAJOR TRAITS: high alpha acids content, resistance to both Downy and
Powdery mildew.
OTHER INFORMATION: valuable for mildew disease reistant hops