A species of plant mentioned in one version of the Narn i Chîn Húrin (UT/99), translated “snowthorn” and described as “like furze (gorse), but larger, and with white flowers” (UT/148 note #14). Aeglos was also the name of the spear of Gil-galad, translated as “Icicle” in The Lord of the Rings index (LotRI/Aeglos); it is possible this word can be used for ordinary icicles as well. In the Silmarillion index, it was translated more literally as “Snow-point” (SA/Aeglos), a combination of aeg “sharp” and loss “snow”.
Conceptual Development: G. helfingl or helfin(n) was the word for “icicle” in the Gnomish Lexicon of the 1910s (GL/48), probably a combination of ᴱ√HELE “freeze” with G. fingl “tress”.
A plant with red flowers growing on top of Amon Rûdh (S/203), whose name Tolkien translated as “blood of stone”, and described as “a plant of the kind called in English ‘stonecrop’; it had flowers of a deep red” (UT/148). This word is a combination of sereg “blood” and gond “stone” (SA/gond, sereg).