Teas are small to medium-sized plants to 4 feet tall. From the rose Autumn Damask, comes a short lived class called portlands . Portlands were popular in the mid to late 1800's. There are less than 20 portlands commercially available today. An alleged chance cross between Autumn Damask and a china resulted in the bourbon class.
Bourbons are a varied class.
Most are repeat-blooming plants from 2 to 15 feet tall, with fragrant, full, and often quartered blooms. They were popular from the mid to late 1800's. Hybrid perpetuals are the most commonly grown OGR's and the ones most likely to be seen at shows. They were very popular in the mid to late 1880's when there were more than 4,000 varieties available. Most hybrid perpetuals are repeat blooming, tall plants over 6-feet, with full, fragrant blooms in mostly pinks and reds.