Final answer:
The subcutaneous disease with an endogenous origin most commonly mentioned is sporotrichosis, caused by the fungus Sporothrix schenckii and known as rose gardener's disease.
Step-by-step explanation:
Subcutaneous mycoses are infections caused by fungi that penetrate the skin's surface and reach the underlying tissues. The most common subcutaneous mycosis with an endogenous origin, which means it originates within the body, is sporotrichosis. This infection is caused by the fungus Sporothrix schenckii. It is also known as rose gardener's disease because individuals often contract it while handling soil, plants, or timber, especially when they come into contact with thorns or splinters. This condition leads to skin lesions and can spread to the lymphatic system. It is, however, not the only subcutaneous mycosis. Others, such as blastomycosis and chromoblastomycosis, are similarly severe, but sporotrichosis is the most common and directly answers the student's question.