Anastraphia obovata Urb. & Ekman (original description)
Artemisia stipularis Urb. & Ekman (original description)
Bidens monophyllus Urb. (original description)
Chaptalia azuensis Urb. & Ekman (original description)
Chaptalia crispata Urb. & Ekman (original description)
Chaptalia denticellata Urb. & Ekman (original description)
Chaptalia dolichopoda Urb. & Ekman (original description)
Chaptalia flavicans Urb. & Ekman (original description)
Chaptalia latipes Urb. & Ekman (original description)
Chaptalia mornicola Urb. & Ekman (original description)
Chaptalia undulata Urb. & Ekman (original description)
Chaptalia vegaensis Urb. & Ekman (original description)
Erigeron ocoensis Urb. & Ekman (original description)
Erigeron psilocaulis Urb. (original description)
Eupatorium bullulatum Urb. & Ekman (original description)
Eupatorium cabaionum Urb. & Ekman accepted as Koanophyllon cabaionum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium chabrense Urb. & Ekman accepted as Koanophyllon chabrense (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium delpechianum Urb. & Ekman accepted as Koanophyllon delpechianum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium flavidulum Urb. & Ekman accepted as Koanophyllon flavidulum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium heterosquameum Urb. & Ekman accepted as Chromolaena heterosquamea (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium hotteanum Urb. & Ekman accepted as Koanophyllon hotteanum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium iteophyllum Urb. & Ekman accepted as Koanophyllon iteophyllum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium microchaeteum Urb. & Ekman accepted as Koanophyllon microchaeteum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium paucicrenatum Urb. & Ekman accepted as Koanophyllon paucicrenatum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium phanioides Urb. & Ekman accepted as Koanophyllon phanioides (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium pitonianum Urb. & Ekman accepted as Koanophyllon pitonianum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium porphyrocladum Urb. & Ekman accepted as Koanophyllon porphyrocladum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium quinqueflorum Urb. & Ekman accepted as Eupatorium mohrii Greene (original description)
Eupatorium rubroviolaceum Urb. & Ekman accepted as Koanophyllon rubroviolaceum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium scabriusculum Urb. & Ekman accepted as Koanophyllon scabriusculum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium sinuatum var. viscigerum Urb. & Ekman (original description)
Eupatorium stigmaticum Urb. & Ekman accepted as Critonia stigmatica (Urb. & Ekman) R.M.King & H.Rob. (original description)
Eupatorium subpurpureum Urb. & Ekman accepted as Koanophyllon subpurpureum (Urb. & Ekman) R.M.King & H.Rob. (original description)
Gnaphalium acutiusculum Urb. & Ekman (original description)
Gnaphalium selleanum Urb. & Ekman (original description)
Gundlachia compacta Urb. & Ekman accepted as Gundlachia corymbosa var. compacta (Urb. & Ekman) M.A.Lane (original description)
Gundlachia ocoana Urb. & Ekman accepted as Gundlachia corymbosa var. ocoana (Urb. & Ekman) M.A.Lane (original description)
Hieracium ekmanii Zahn (original description)
Liabum barahonense Urb. (original description)
Liabum oblanceolatum Urb. & Ekman (original description)
Liabum ovatifolium Urb. (original description)
Liabum poiteaui (Cass.) Urb. (original description)
Liabum polycephalum Urb. & Ekman (original description)
Liabum selleanum Urb. (original description)
Mattfeldia Urb. (original description)
Mattfeldia triplinervis Urb. (original description)
Mikania cyanosma Urb. & Ekman (original description)
Mikania dissecta Urb. & Ekman (original description)
Mikania hotteana Urb. & Ekman (original description)
Mikania platyloba Urb. & Ekman (original description)
Mikania producta Urb. & Ekman (original description)
Mikania rhomboidea Urb. & Ekman (original description)
Pectis mornicloa Urb. & Ekman (original description)
Pectis mornicola Urb. & Ekman (original description)
Pectis purpurascens Urb. & Ekman (original description)
Pectis subeglandulosa Urb. & Ekman (original description)
Piptocoma antillana Urb. (original description)
Proustia stenophylla Urb., Ekman & Urb. (original description)
Senecio barahonensis Urb. (original description)
Senecio hotteanus Urb. & Ekman (original description)
Senecio kuekenthalii Urb. & Ekman (original description)
Senecio marcianus Urb. & Ekman (original description)
Verbesina ekmanii Urb. (original description)