> I can't understand anything.
Is the typical botanical idiomatic problem.
Petiolate: Leaves join the stem by a narrow "tail".
oblong-elliptic: Shape of the leaf, self-explanatory, also indicates that the leaf is entire (blade shaped as one continuous structure)
acute on both ends: blade leaf starts and ends in a point (that is short in both cases).
glabrous above: upper surface smooth
slightly hairy below: surface below covered by tiny "bumps" or vesicles to protect from dry or chill conditions (feels hairy to the touch)
Peduncles thickened at the apex: Ambiguous, but that "tail" is more thick in one extreme (probably before to join the leaf blade).
Hemispherical capitula: Flowers "glued together" over a disk, and arranged as a half sphere. Is not exactly like a daisy, but you pick the idea.
involucre with lanceolate acuminate leaves subequal to the flowers:
That "disk" has also spear-shaped bracts (accessory small leaves) that are more or less as long as the flowers are.
Flowers subvillous-tomentose with yellowish pubescence
Flowers in this genus have a strange (and pleasant) plush texture. They are covered by a dense layer of short yellow (or red) hairs. Is very strange the first time that you see it, but also adds a lot of charm and coolness to the species.