Malva alcea Malva alcea Malva alcea (greater musk-mallow, cut-leaved mallow, vervain mallow or hollyhock mallow) is a plant in the mallow family native to southwestern, central and eastern Europe and southwestern Asia, from Spain north to southern Sweden and east to Russia and Turkey. It is a herbaceous perennial plant growing to 50–125 cm tall, with stems covered in stellate hairs, meaning they branch at the free end into several strands. The leaves are 2–8 cm long and 2–8 cm broad, palmately lobed with five to seven blunt lobes; basal leaves on the lower stem are very shallowly lobed, those higher on
Pityriasis rosea which cause roseola in infants. Experienced practitioners may make the diagnosis clinically. If the diagnosis is in doubt, tests may be performed to rule out similar conditions such as Lyme disease, ringworm, guttate psoriasis, nummular or discoid eczema, drug eruptions, other viral exanthems. The clinical appearance of pityriasis rosea is similar to that of secondary syphilis, and rapid plasma reagin testing should be performed if there is any clinical concern for syphilis. A biopsy of the lesions will show extravasated erythrocytes within dermal papillae and dyskeratotic cells within the dermis. A set of validated diagnostic criteria for pityriasis rosea is