She was also well-known to have had a wound over the heart as a result of an ecstasy in which an angel pierced it with a dart.
"The Ecstasy of St. Teresa" by Bernini
Your source seems to be discussing many different phenomena as "stigmata" and doesn't necessary distinguish clearly between them - it seems to term anyone bearing any visible mark (not necessarily the Five Wounds) as a "stigmatist". So under that somewhat expanded definition St. Teresa qualifies - but her picture would not show wounds on her hands.