Boston Early Music Festival’s presentation of two Marc-Antoine Charpentier chamber operas took us from the playful, elegant, high baroque world of the court of Louis XIV, into something more serious and grave, and then back out again. First we were given most of La Couronne de Fleurs, a Pastoral probably not meant for full staging, where Flore, goddess of spring—well sung, and acted with spirit, by soprano Mireille Asselin—summons up the season and then proposes to shepherds and shepherdesses a contest to praise Louis XIV’s military triumphs, the winner to receive the crown of flowers of the title. After the conventional tributes are made, the production turns to the short opera La Descente d’Orphée aux Enfers, presenting it as a further entry in the poetic contest, though this is done a bit awkwardly, since the piece does not refer to Louis. The Orpheus opera seems not to have been finished by Charpentier, having only two acts instead of the usual three, and stopping with the beginning of Orpheus’s ascent from the Underworld with his lover Euridice rescued from death. We do not get the familiar incident of his prohibited looking back at her and thus permanent loss of her.