Definition of "griesly"

Where I was wont to ſeeke the honey Bee, / Working her formall rowmes in Wexen frame: / The grieſlie Todeſtoole growne there mought I ſe / And loathed Paddocks lording on the ſame.Where I was wont to seek the honey bee, / Working her formal rooms in waxen frame: / The grisly toadstool grown there might I see / And loathed paddocks lording on the same.

1579, Immeritô [pseudonym; Edmund Spenser], “December. Aegloga Duodecima.”, in The Shepheardes Calender: […], London: […] Hugh Singleton, […]; reprinted as H[einrich] Oskar Sommer, editor, The Shepheardes Calender […], London: John C. Nimmo, […], 1890, folio 49, verso

And his faire lockes […] He let to grow and griesly to concrew.

1596, Edmund Spenser, “Book IV, Canto VII”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, stanza 40