(en) Lyndon Penner, The Prairie Short Season Yard: Quick and Beautiful on the Canadian Prairies, Brush Education, (ISBN978-1-55059-543-7, lire en ligne).
(en) Brett E. Serviss, James H. Peck et Kristen R. Benjamin, « Crocus Flavus: A New Genus and Species of Non-Native Iridaceae for the Arkansas (U.s.a.) Flora », Journal of the Botanical Research Institute of Texas, vol. 10, no 2, , p. 513–516 (ISSN1934-5259, JSTOR44858594, lire en ligne).
(en) Brett E. Serviss, James H. Peck et Kristen R. Benjamin, « Crocus Flavus: A New Genus and Species of Non-Native Iridaceae for the Arkansas (U.s.a.) Flora », Journal of the Botanical Research Institute of Texas, vol. 10, no 2, , p. 513–516 (ISSN1934-5259, JSTOR44858594, lire en ligne).
(en) Leo Jelitto (Wilhelm Schacht, Michael E. Epp, John Philip Baumgardt, Alfred Fessler), Hardy herbaceous perennials, Portland, Or., Timber Press, (ISBN0-88192-159-9, OCLC20012412, lire en ligne), p. 170