From the Greek erion, wool, and from the Latin achaenium
, a type of fruit, by the villose fruits.
3 mm latum at basis, pyramide trigona minuscula terminata; setae 6 brevibus vix scabrae, achaenium
From the Greek makros, big, and achaena or achaenium
, the typical fruit of Asteraceae, in reference to the size of the cypselae.