The appressorium is already larger than the parasite seed, the contact to the host vessels is established The justification of the term "tubercle" from a morphological point of view is doubtful, as the term "haustorium" covers this developmental stage From the practical side this terminology however is useful in the case of the chemical control of Orobanche
A round nodule, small eminence, or warty outgrowth found on bones especially for the attachment of a muscle or ligament. A small elevation on the surface of a tooth
A small knoblike prominence or excrescence, whether natural or morbid; as, a tubercle on a plant; a tubercle on a bone; the tubercles appearing on the body in leprosy