| Castilleja ambigua M.E.Jones | Castilleja nana Eastw. |
| Castilleja andrewsii L.F.Hend. | Castilleja rupicola Piper ex Fernald |
| Castilleja angustifolia A.Gray | Castilleja integra A.Gray |
| Castilleja angustifolia adenophora Fernald | Castilleja angustifolia (Nutt.) G.Don |
| Castilleja angustifolia hispida (Benth. ex Hook.) Fernald | Castilleja hispida Benth. |
| Castilleja annua Pennell | Castilleja pallida var. caudata Pennell |
| Castilleja applegatei martinii (Abrams) T.I.Chuang & Heckard | Castilleja martini Abrams |
| Castilleja arachnoidea schizotricha (Greenm.) Pennell | Castilleja schizotricha Greenm. |
| Castilleja bennittii A.Nelson & J.F.Macbr. | Castilleja angustifolia (Nutt.) G.Don |
| Castilleja brachyantha Rydb. | Castilleja flava S.Watson |
| Castilleja bradburii (Nutt.) G.Don | Castilleja angustifolia (Nutt.) G.Don |
| Castilleja breviflora A.Gray | Castilleja flava S.Watson |
| Castilleja breviflora Benth. | Castilleja fissifolia L.f. |
| Castilleja brooksii Eastw. | Castilleja applegatei Fernald |
| Castilleja buffumii A.Nelson | Castilleja angustifolia (Nutt.) G.Don |
| Castilleja caudata (Pennell) Rebrist. | Castilleja pallida var. caudata Pennell |
| Castilleja confusa Greene | Castilleja miniata Douglas ex Hook. |
| Castilleja coronopifolia Vent. | Castilleja fissifolia L.f. |
| Castilleja crispula Piper | Castilleja miniata Douglas ex Hook. |
| Castilleja culbertsonii Greene | Castilleja lemmonii A.Gray |
| Castilleja curticalyx A.Nelson & J.F.Macbr. | Castilleja flava S.Watson |
| Castilleja desertorum Geyer | Castilleja parviflora Bong. |
| Castilleja divaricata Benth. | Castilleja fissifolia L.f. |
| Castilleja dolichostylis Eastw. | Castilleja applegatei Fernald |
| Castilleja eastwoodiana Pennell | Castilleja arachnoidea Greenm. |
| Castilleja elkoensis Edwin | Castilleja flava S.Watson |
| Castilleja elongata Pennell | Castilleja integra A.Gray |
| Castilleja excelsa Eastw. | Castilleja applegatei Fernald |
| Castilleja fasciculata A.Nelson | Castilleja pallescens (A.Gray) Greenm. |
| Castilleja filifolia Eastw. | Castilleja arachnoidea Greenm. |
| Castilleja fissifolia angustifolia Benth. | Castilleja fissifolia L.f. |
| Castilleja fissifolia nubigena (Kunth) Wedd. | Castilleja nubigena Kunth |
| Castilleja fissifolia pumila (Benth.) Wedd. | Castilleja pumila (Benth.) Wedd. |
| Castilleja flavoviridis Kelso | Castilleja puberula Rydb. |
| Castilleja floccosa Pennell ex M.Peck | Castilleja arachnoidea Greenm. |
| Castilleja gloriosa Britton | Castilleja integra A.Gray |
| Castilleja gyroloba Pennell | Castilleja martini Abrams |
| Castilleja henryae Pennell | Castilleja parviflora Bong. |
| Castilleja hoffmannii Eastw. | Castilleja applegatei Fernald |
| Castilleja humilis Rydb. | Castilleja rhexiifolia Rydb. |
| Castilleja inconspicua A.Nelson & P.B.Kenn. | Castilleja nana Eastw. |
| Castilleja indecora Piper | Castilleja chrysantha Greenm. |
| Castilleja integra gloriosa (Britton) Cockerell | Castilleja integra A.Gray |
| Castilleja jusselii Eastw. | Castilleja pilosa (S.Watson) Rydb. |
| Castilleja kuschei Eastw. | Castilleja hyperborea Pennell |
| Castilleja labiata Pennell | Castilleja citrina Pennell |
| Castilleja lanceifolia Rydb. | Castilleja rhexiifolia Rydb. |
| Castilleja lapidicola A.Heller | Castilleja nana Eastw. |
| Castilleja lauta A.Nelson | Castilleja rhexiifolia Rydb. |
| Castilleja leonardii Rydb. | Castilleja rhexiifolia Rydb. |
| Castilleja linoides A.Gray | Castilleja flava S.Watson |
| Castilleja magna Rydb. | Castilleja rhexiifolia Rydb. |
| Castilleja magnistylis Edwin | Castilleja viscidula A.Gray |
| Castilleja mearnsii Pennell | Castilleja lindheimeri A.Gray |
| Castilleja mexiae (Pennell) Eastw. | Castilleja elegans Malte |
| Castilleja miniata alpina Suksd. | Castilleja parviflora Bong. |
| Castilleja muelleri Pennell | Castilleja pallida var. yukonis (Pennell) J.M.Egger |
| Castilleja multisecta A,Nelson | Castilleja covilleana L.F.Hend. |
| Castilleja nubigena pumila Benth., Prodr. [A.P.de Candolle] 10: 543 (1846) | Castilleja pumila (Benth.) Wedd. |
| Castilleja obtusiloba Rydb. | Castilleja rhexiifolia Rydb. |
| Castilleja ochracea Eastw. | Castilleja pilosa (S.Watson) Rydb. |
| Castilleja olympica G.N.Jones, Univ. Wash. Publ. Biol. 5: 231 (1936) | Castilleja parviflora Bong. |
| Castilleja oregonensis Gand. | Castilleja rhexiifolia Rydb. |
| Castilleja oreopola albida Pennell, Proc. Acad. Nat. Sci. Philadeplhia 99: 188 (1947) | Castilleja parviflora Bong. |
| Castilleja ownbeyana Pennell | Castilleja chrysantha Greenm. |
| Castilleja pallida auricoma Pennell | Castilleja pallida var. caudata Pennell |
| Castilleja pallida elegans (Malte) Pennell | Castilleja elegans Malte |
| Castilleja pallida haydenii A.Gray, Syn. Fl. N. Amer. 2(1): 297 (1878) | Castilleja haydenii (A.Gray) Cockerell |
| Castilleja pallida miniata (Douglas ex Benth.) A.Gray | Castilleja miniata Douglas ex Hook. |
| Castilleja parvula revealii (N.H.Holmgren) N.D.Atwood | Castilleja revealii N.H.Holmgren |
| Castilleja payneae Eastw. | Castilleja arachnoidea Greenm. |
| Castilleja pecten Rydb. | Castilleja flava S.Watson |
| Castilleja pilosa jusselii (Eastw.) Munz | Castilleja pilosa (S.Watson) Rydb. |
| Castilleja pratensis A.Heller | Castilleja pilosa (S.Watson) Rydb. |
| Castilleja psittacina (Eastw.) Pennell | Castilleja pilosa (S.Watson) Rydb. |
| Castilleja pulchella acutina E.H.Kelso | Castilleja pulchella Rydb. |
| Castilleja pumicicola Pennell | Castilleja arachnoidea Greenm. |
| Castilleja purpurea citrina (Pennell) Shinners | Castilleja citrina Pennell |
| Castilleja purpurea corallina Waterf. | Castilleja purpurea (Nutt.) G.Don |
| Castilleja purpurea lindheimeri (A.Gray) Shinners | Castilleja lindheimeri A.Gray |
| Castilleja remota Greene | Castilleja hispida Benth. |
| Castilleja roseana Eastw. | Castilleja martini Abrams |
| Castilleja rubida monoensis (Jeps.) Edwin | Castilleja pilosa (S.Watson) Rydb. |
| Castilleja stricta Benth. | Castilleja fissifolia L.f. |
| Castilleja subcinerea Rydb. | Castilleja angustifolia (Nutt.) G.Don |
| Castilleja subpurpurascens Rydb. | Castilleja rhexiifolia Rydb. |
| Castilleja toluccensis Cham. & Schltdl. | Castilleja parviflora Bong. |
| Castilleja trifida Willd. ex Walp. | Castilleja nubigena Kunth |
| Castilleja trisecta Greene | Castilleja applegatei Fernald |
| Castilleja tweedyi Rydb. | Castilleja miniata Douglas ex Hook. |
| Castilleja villosissima Pennell | Castilleja hyperborea Pennell |
| Castilleja vilosissima Pennell | Castilleja hyperborea Pennell |
| Castilleja williamsii Pennell | Castilleja purpurea (Nutt.) G.Don |
| Castilleja yukonis Pennell | Castilleja pallida var. yukonis (Pennell) J.M.Egger |
| Castilleja zionis Eastw. | Castilleja scabrida Eastw. |