Thyrsanthemum macrophyllum is treated as a synonym of Thyrsanthemum floribundum in this recent monograph of the genus
Recircumscription and synopsis of Thyrsanthemum and Weldenia
(Commelinaceae), two narrow endemic genera from Mesoamerica
Article in Kew Bulletin · July 2021
Unintended disagreements occur when a parent (B) is
thinned by swapping a child (E) to another part of the
taxonomic tree, resulting in existing IDs of the parent being interpreted
as disagreements with existing IDs of the swapped child.
Identification
ID 2 of taxon E will be an unintended disagreement with ID 1 of taxon B after the taxon swap
If thinning a parent results in more than 10 unintended disagreements, you
should split the parent after swapping the child to replace existing IDs
of the parent (B) with IDs that don't disagree.
Can only see it under T. longifolium as in POWO:
"1.4. Thyrsanthemum longifolium (M.Martens &
Galeotti) M.Pell. & Espejo, comb. nov.
http://www.ipni.org/urn:lsid:ipni.org:names:77216909-1
Tradescantia dracaenoides (C.B.Clarke) Greenm.
(Greenman 1903: 70). Tradescantia longifolia
(M.Martens & Galeotti) Greenm. (Greenman
1898: 471), nom. illegit., non T. longifolia Sessé &
Moc., nec T. longifolia Small. Tradescantia holosericea
var. dracaenoides C.B.Clarke in A.DC. & C.DC.
(1881: 302). Dichorisandra longifolia M.Martens &
Galeotti, Bull. Acad. Roy. Sci. Bruxelles 9: 378 (1842).
Type: Mexico. Hidalgo: Metztitlán, San Pedrito,
1840, fl., H. G. Galeotti 4942 (holotype: BR barcode
BR0000008577955!).
Thyrsanthemum macrophyllum (Greenm.) Rohweder
(1956: 166), as “macrophylla”. Aneilema greenmanii
Woodson (1942: 147). Tradescantia macrophylla
Greenm. (Greenman 1898: 472), synon. nov. T"