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Aggressive Type
This group is recognized for its aggressive lateral growth habit and development of a turf with very high shoot density. Examples: Limousine, Julius, P-104, and Touchdown
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American Type
Within the Compact Type a number of varieties exhibit growth and performance similar to American. These varieties have fine leaf texture and higher tiller density than other compact type varieties. American Types in contrast to Midnight Types have good resistance to powdery mildew. Examples: Apollo, American, Unique, Mystere, and Bedazzled
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Bellevue Type
Turf with medium to low growth, medium to wide leaves and medium density. Excellent cool-season vigor exists in this group, which is evident by excellent color retention and turf quality during winter and early spring green-up. This group has good recovery to summer stress, good resistance to stripe smut disease, but is highly susceptible to billbug damage.
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BVMG Type
Dragon, Baron, Victa, Merit, Gnome types. This group has high speed yield potential and generally produces medium to good quality turf in the absence of stripe smut. The BVMG Types generally are very stemmy in early spring. This group also has poor winter color, long winter dormancy, and suffers from significant billbug damage.
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CELA Type
Cultivars of this type exhibit early spring green-up similar to Bellevue Types, but tend to have less seed head formation under mowed turf conditions than cultivars within the Bellevue Type. Examples: Challenger, Eclipse, Liberty, and Adelphia
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Cheri Type
They will produce a turf of medium-low growth and medium density with medium wide leaves. These cultivars have moderate resistance to stripe smut and are moderately susceptible to dollar spot. Seed yield potential of these cultivars is relatively high.
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Common Type
Generally erect growing types with narrow leaf blades. All common types are susceptible to leaf spot and may be extensively damaged by this disease during the cool, humid conditions of winter and spring.
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Compact Type
Low compact growth and good leaf spot resistance. This group has long winter dormancy (except P-105) and good stripe smut resistance. Examples: Princeton-105, Diva, Moonlight, Blackstone, Apex, Glade, Alpine
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Julia Type
These cultivars form a high quality turf, but have moderate winter performance. They also exhibit good resistance to leaf spot, but can be damaged significantly by brown patch.
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Mid-Atlantic Type
This group forms vigorous turf of medium density with deep, extensive root and rhizome systems. This group has moderate susceptibility to leaf spot, but has excellent ability to recover from leaf spot and other stress due to the deep extensive rhizomes system. This group has great tolerance to heat and summer stress. Examples: Eagleton, Preakness, Hunnington, and Livingston
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Midnight Type
Within the Compact Type family, this group has very long winter dormancy, late spring green-up, very dark green turf color, good heat tolerance, but are susceptible to powdery mildew. Examples: Ginney, Alexa, Midnight, NuGlade, Quantum Leap, Total Eclipse, and Award
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Shamrock Type
Similar to the BVMG Types with high seed yield potential, but unlike the BVMG, Shamrock types exhibit good resistance to stripe smut. Examples: Guinness and Shamrock
