Lasthenia?
In Athens, Lasthenia of Mantinea was a woman of the Stranger (outsider) class. She shunned the protection of legal status typically sought through association with a male Athenian of the Citizen class. Instead, she dressed as a man; and openly attended Plato's Academy.
The eponymous botanical genus Lasthenia encompasses species that live primarily within the California Floristic Province, many endemically. Also known as "goldfields" and usually gregarious, they are short, small, bright yellow flowers, though the modest L. glaberrima and L. microglossa may exhibit nary more than the central disc definitive of the Asteraceae family.
Lasthenia graphic t-shirts are designed in Oakland, "Athens of the Pacific", and printed locally (Oakland, Berkeley, Emeryville). Whether fixin' down in the Town, risin' up in the Oakropolis, or just chillin' out in your present locale, Lasthenia designs may be worn openly, or modestly, in class, with class, or otherwise.