Sirenflower is an I.C.E. Age plant resembling a snapdragon with one large blossom. The lightest breeze will make it produce a sound resembling the keening, sad song of a woman, forming a chorus when clustered together. They grow in the wild and often are found next to graveyards and ancient battle grounds. Its presence in The Graveyard is one of the details in the room painting hinting at the bog, which is a flooded cemetery, being the site of the battle where Kestrel Etrevion used demons and was killed in his field tent by his brother. It might also symbolize with the dirges simultaneous wrath and sullenness.
I.C.E. Age Example
Sirenflower is on page 12 of the Shadow World Master Atlas: Inhabitants Guide (1989). It is not a toxic plant, unlike most of the ones in The Graveyard.
[Graveyard, Bog] Strangely carved tombstones with fiendish faces and creatures incised upon them bear epitaphs in long-forgotten scripts. Mute testament to slain heroes and fallen villains, the unearthly silence is broken only by the eerie rustlings of the sirenflower plants growing among the gravesites. Obvious paths: south, west >search You look over the graves carefully, but don't find anything of interest.
Behind the Scenes
Sirenflower was supposed to be converted to mournbloom in the De-ICE transition. Both words persisted in the game itself, and became separate plants when the modern documentation was written. Sirenflower kept the sound premise and was given Ashrim lore related to Jastev and prophecy, but the emphasis was shifted to a purported ability to signal (i.e. siren of danger) that spirits or demons are drawing near when rustling on windless days. Grishom Stone is associated with sirenflowers. Mournbloom kept the sad sound and mourning premise, and was then associated with the sylvans.