Formosa Oolong is the style of brown oolong that generations of AMerican have loved, especially for its toasty flavor. Don't worry about the stems; the tea is traditionally made this way in Taiwan. A Harney & Sons Fine Tea
This tea was quite popular in the US for several decades. A British entrepreneur named John Dodd developed it in the middle of the nineteenth century. It is oxidized to about 75%, so it is darker than most other oolongs.