Skullcap Explained

Skullcap or skull cap usually refers to various types of headgear. Specifically it may refer to:

Headwear

Beanie (seamed cap)
Biretta, forming part of some clerical, academic or legal dress
Calotte (Belgium), a skullcap worn by students at Catholic universities in Belgium
Capeline, worn under civilian hats during early modern periods
Cervelliere, a medieval metal helmet
Jeep cap
Kerchief or durag, as stereotypically worn by pirates and often featuring actual skull print
Kippah or yarmulke, worn by Jewish men
Kufi, worn primarily by men of West African heritage
Scrub cap, worn by healthcare professionals while performing procedures
Scrum cap, worn by rugby players
Sindhi cap worn by Sindhi people of Pakistan, and others
Taqiyah (cap), worn by some Muslim men
Tubeteika, a Central Asian cap
Tuque, a knit hat
Zucchetto, worn by Catholic clergy

Galerina marginata, a poisonous mushroom also known as "deadly skullcap" or "autumn skullcap"
Scutellaria, a genus of flowering plants also known as "skullcaps"
- Scutellaria baicalensis ("Baikal skullcap", "Chinese skullcap"), an herb native to eastern Asia
- Scutellaria lateriflora ("blue skullcap", "American skullcap", "mad dog skullcap", "side-flowering skullcap"), a perennial herb native to North America