Biennial herbs with prickly stems and leaves; leaves opposite, simple, the opposite pairs often fused at the bases; flowers bisexual, irregular, in bracteate heads; fruit a nutlet.2 members in the Family
Biennial herbs with prickly stems and leaves; leaves opposite, simple, the opposite pairs often fused at the bases; flowers bisexual, irregular, in bracteate heads; fruit a nutlet.2 members in the Family
