The upper part of the inflorescences is densely covered with glandular trichomes while the lower part has fewer trichomes and is often glabrous. Individual flowers have rounded upper lips on the corolla instead of being lobed and a relatively straight spur.
The top portion of the flower clusters is densely packed with fine, hair-like structures, whereas the lower part is less hairy and may be entirely free of them. The individual flowers feature rounded edges on their upper lip, rather than being split, and have a relatively direct stalk.