Alyssum idaeum Boiss. & Heldr. in Boiss., Diagn. Pl. Orient. 8: 35. 1849.

Type: “Hab. ad saxa cacuminum montis Idae act 6000' rarum (Heldreich)”.

Holotypus: GREECE: “ Creta in saxosis montis Ida ”, 6000' [1830 m], 28.V.1846, Heldreich 1509 (G-BOIS [G00332382]; iso-: B [B100244988], BM [BM000750129], G [G00389046, G00446190], GH [GH00018547], GOET [GOET002688], K [K000484586, K000484587, K000484588, K000484589], W [W00075613], WU [WU0076290]) .

Notes. – The holotype sheet has two labels, of which the one written by Heldreich (“in saxis. Mt Ida – sommités”) has the collection number and day, and the other is mimeographed written by Boissier as above but lacks both. However, the locality, elevation, month, and year in both are identical.

All isotypes, except for the BM and K000484588 that carry Heldreich’s writing, have the mimeographed Boissier label.