The noun is collective, a single flower being lotheg
Sindarin
lotheg
noun. single flower, single [small] flower, *floret
lotheg
noun. (single) flower
loth
noun. flower, inflorescence, a head of small flowers
loth
noun. flower
_n._flower, a single bloom. Q. lóte, lōs.
lotheg
single flower
lotheg, lothod (”singulars” derived from the more collective term loth; it is unclear whether lotheg, lothod can themselves have ”plural” forms. If so it would be lethig, lethyd, for archaic löthig, löthyd.) (VT42:18, VT45:29) Another word for a single flower is elloth (pl. ellyth) (VT42:18). An alternative to loth is loss (construct los; pl. lyss), but the form loth seems to be more common (and loss also means ”fallen snow” and ”wilderness”). COLLECTION OF FLOWERS gwaloth (i **waloth) (blossom), pl. gwelyth (in gwelyth). Also goloth (i **oloth) (blossom), pl. gelyth (i ngelyth = i ñelyth). Archaic pl. gölyth. (VT42:18)._ _Specific flowers, see DAISY, GLADDEN, SNOWDROP, FLOWER OF GOLD, HORNFLOWER.
lotheg
single flower
lothod (”singulars” derived from the more collective term loth; it is unclear whether lotheg, lothod can themselves have ”plural” forms. If so it would be lethig, lethyd, for archaic löthig, löthyd.) (VT42:18, VT45:29) Another word for a single flower is elloth (pl. ellyth) (VT42:18). An alternative to loth is loss (construct los; pl. lyss), but the form loth seems to be more common (and loss also means ”fallen snow” and ”wilderness”).
loth
flower
loth, pl. lyth (but loth is also glossed ”blossom” and may itself function as a collective term: all the flowers of a plant. For individual flowers cf. the following:)
loth
flower
pl. lyth (but loth is also glossed ”blossom” and may itself function as a collective term: all the flowers of a plant. For individual flowers cf. the following:)
alf
noun. flower
elanor
noun. a flower, a kind of enlarged pimpernel bearing golden and silver flowers
elloth
noun. (single) flower
elloth
noun. single flower
A word for a “single flower” in note from the late 1960s, a combination of er “one” and loth “flower(s)” (VT42/18), where *rl* became *ll* as sometimes happened in (old) Sindarin compounds. This word can be necessary because loth refers to both a single flower or a group of flowers; see that entry for details.
mallos
noun. a golden flower
ninglor
noun. golden water-flower, gladden
niphredil
noun. a pale winter flower, snowdrop
edlothia
flower
(verb) #edlothia- (i edlothia, in edlothiar) (to blossom);
edlothia
flower
(i edlothia, in edlothiar) (to blossom);
edlothiad
flowering
(blossoming), pl. edlothiaid if there is a pl.**
gwaloth
collection of flowers
(i ’waloth) (blossom), pl. gwelyth (in gwelyth). Also goloth (i ’oloth) (blossom), pl. gelyth (i ngelyth = i ñelyth). Archaic pl. gölyth. (VT42:18). Specific flowers, see
A word for a single flower in notes from the late 1960s, a singular form of loth (VT42/18). This word is sometimes necessary because loth can refer to either a single flower or a collection of flowers; see that entry for details.
Conceptual Development: The Etymologies of the 1930s had N. lhothod as a singular form of N. lhoth “flower(s)” under the root ᴹ√LOT(H) (EtyAC/LOT(H)). The Gnomish Lexicon of the 1910s had G. lothli “floret”, perhaps a diminutive form of G. lôs “flower” (GL/54) with *sl* > *thl*.
Neo-Sindarin: Since -eg acts as both a singular suffix and a diminutive suffix, I would assume lotheg refers to single smaller flower or floret, as opposed to elloth for a larger individual flower.