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 upper part of the inflorescences is densely covered with fine hairs, while the lower section has fewer hairs and may be smooth. Individual flowers have rounded edges on the upper lip of the corolla, as opposed to being divided, and have a straight spur.