Gnaphalium coarctatum Willd. is a synonym of Gamochaeta americana (Mill.) Wedd.；https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:315885-2

Gnaphalium coarctatum Willd. is an accepted name；http://www.plantlist.org/tpl1.1/record/gcc-131674

Gnaphalium coarctatum Willd., Sp. Pl., ed. 4 [Willdenow] 3(3): 1886 (1803).；https://www.biodiversitylibrary.org/page/667275#page/412/mode/1up
- Gnaphalium spicatum Lam., Encycl. [J. Lamarck & al.] 2(2): 757 (1788), nom. illeg.；https://www.biodiversitylibrary.org/page/721411#page/759/mode/1up

Gnaphalium coarctatum Willd.；Pruski & Nesom, Sida 21: 713 2004；https://www.biodiversitylibrary.org/page/9310941#page/733/mode/1up
Gnaphalium coarctatum Willd.；Singh & Sharma, Bull. Bot. Surv. India 30: 181 f.1-7 1988；Singh, Harinder & M. Sharma 1988Gnaphalium coarctatum Willd. - A South American Taxon Naturalised in Chamba District (Himachal Pradesh), India Bull. Bot. Surv. India 30: 181-184
Gnaphalium coarctatum Willd.；Hilliard, Fl. S. Africa 33,7: 28 1983；https://www.biodiversitylibrary.org/page/51373401#page/40/mode/1up
Gnaphalium coarctatum Willd.；Todd, Muelleria 6: 67 1984；https://www.biodiversitylibrary.org/page/50960194#page/71/mode/1up
Gnaphalium coarctatum Willd.；Kunth, Nov. Gen. Sp. [Folio] 4: 67 1820；https://www.biodiversitylibrary.org/page/58751467#page/135/mode/1up

Gnaphalium spicatum Lam. is a synonym of Gnaphalium coarctatum Willd.；http://www.plantlist.org/tpl1.1/record/gcc-104085

Gnaphalium spicatum Lam., Encycl. [J. Lamarck & al.] 2(2): 757 (1788), nom. illeg.；https://www.biodiversitylibrary.org/page/721411#page/759/mode/1up

Gnaphalium spicatum Lam.；DC., Prodr. 6: 232 (1837)；DC., Prodr. [A. P. de Candolle] 6: 232 1838；https://www.biodiversitylibrary.org/page/150177#page/237/mode/1up
- Gnaphalium coarctatum Willd., Sp. Pl., ed. 4 [Willdenow] 3(3): 1886 (1803).；https://www.biodiversitylibrary.org/page/667275#page/412/mode/1up
Gnaphalium spicatum Lam.；Cabrera, Comp. Bonar.: 169, f. 46-B (1941)；Cabrera, A. L. 1941 Compuestas bonaerenses: revisión de las compuestas de la provincia de Buenos Aires, la capital federal y la isla Martín García Revista del Museo de La Plata, sec. Botánica 4: 1-450
Gnaphalium spicatum Lam.；Drury in New Zealand J. Bot. 9: 178, f. 8 1971；Drury, D. G. 1971 The American spicate cudweeds adventive to New Zealand: (Gnaphalium section Gamochaeta—Compositae) New Zealand J. Bot. 9 (1): 157-185
Gnaphalium spicatum Lam.；Grierson, Notes Roy. Bot. Gard. Edinburgh 31(1): 138 1971；https://archive.org/details/notes-from-royal-botanic-garden-edinburgh-31-001-135-138/page/n3/mode/1up

SYN

Gnaphalium spicatum Lam.；Walp., Repert. Bot. Syst. (Walpers) 6: 245 1846；https://www.biodiversitylibrary.org/page/7357903#page/257/mode/1up
- Gnaphalium coarctatum Willd.；Hilliard, Fl. S. Africa 33,7: 28 1983；https://www.biodiversitylibrary.org/page/51373401#page/40/mode/1up
- Gnaphalium consanguineum Gaudich., Ann. Sci. Nat. (Paris) 5: 103 1825；https://www.biodiversitylibrary.org/page/2429892#page/109/mode/1up

Gnaphalium consanguineum Gaudich. is a synonym of Gnaphalium americanum Mill.；http://www.plantlist.org/tpl1.1/record/gcc-91729: Chile

Gamochaeta coarctata (Willd.) Kerguélen is a synonym of Gnaphalium coarctatum Willd.；http://www.plantlist.org/tpl1.1/record/gcc-88050

Gamochaeta coarctata (Willd.) Kerguélen, Lejeunia 120: 104 1987；Kerguélen, M. 1987 Donnees taxonomiques, nomenclaturales et chorologigues pour une revision de la flore de France Lejeunia 120:1-264.

Gamochaeta coarctata (Willd.) Kerguélen；Pruski, Sida 21: 713 2004；https://www.biodiversitylibrary.org/page/9310941#page/733/mode/1up
Gamochaeta coarctata (Willd.) Kerguélen；Nesom, Sida 21: 1183 2004；https://www.biodiversitylibrary.org/page/9311413#page/1203/mode/1up

Gnaphalium purpureum var. spicatum (Lam.) Baker is a synonym of Gnaphalium coarctatum Willd.；http://www.plantlist.org/tpl1.1/record/gcc-68381

Gnaphalium purpureum var. spicatum (Lam.) Baker；Fl. Bras. 6(3): 124 1882；https://www.biodiversitylibrary.org/page/139977#page/69/mode/1up

Pterocaulon virgatum

Pterocaulon virgatum (L.) DC. is an accepted name；http://www.plantlist.org/tpl1.1/record/gcc-96472

Pterocaulon virgatum (L.) DC., Prodr. [A. P. de Candolle] 5: 454 (1836)；https://www.biodiversitylibrary.org/page/151889#page/459/mode/1up
- Gnaphalium virgatum L., Syst. Nat., ed. 10. 2: 1211 (1759)；https://www.biodiversitylibrary.org/page/587130#page/391/mode/1up

Gnaphalium spicatum Mill. is a synonym of Pterocaulon virgatum (L.) DC.；http://www.plantlist.org/tpl1.1/record/gcc-15725

Ifloga spicata

Ifloga spicata (Forssk.) Sch.Bip. is an accepted name；http://www.plantlist.org/tpl1.1/record/gcc-13191

Gnaphalium spicatum (Forssk.) Vahl is a synonym of Ifloga spicata (Forssk.) Sch.Bip.；http://www.plantlist.org/tpl1.1/record/gcc-86629

Gnaphalium spicatum (Forssk.) Vahl；Muschler, Mann. Fl. Egypt 2: 973 1912；https://www.biodiversitylibrary.org/page/11450471#page/307/mode/1up

Gnaphalium spicatum (Forssk.) Vahl；Sp. Pl., ed. 4 [Willdenow] 3(3): 1886 (1803).；https://www.biodiversitylibrary.org/page/667275#page/412/mode/1up