The status of the names of Crinums related to Crinum delagoense is a bit unclear. According to Nikaya Grovender, of the Natal Herbarium, writing in SABONET NEWS, vol. 7 No. 1, pp. 19-20 (March 2002), Archer and Archer established that C. delagoense is a synonym of Crinum stuhlmannii. There is also the possibility that C. graminicola may be a subspecies of C. stuhlmannii, but that has not been established in print as of this date (March 2002).

Incidentally, David Lehmiller says this species should be known as Crinum forbesii. He discusses this in HERBERTIA, Vol 48, pp. 86-90,(1992).

Literature references:

Archer, R.H. & Archer, C. 1996. Notes on African Plants: Should Crinum forbesii (Lindl.) Schult. & Schult.f. be reinstated? Bothalia 26, 2: 153.

Pooley, E. 1998. A field guide to wild flowers --KwaZulu-Natal and the eastern region. Natal Floral Publications Trust, Durban, pp. 350-351.

Verdoorn, I.C. 1962. Crinum delagoense. The Flowering Plants of Africa 35:t. 1389.

Verdoorn, I.C. 1973. The genus Crinum in Southern Africa. Bothalia 11: 27-52.

Other Sources of Information

RHS Manual of Bulbs, John Bryan and Mark Griffiths, Eds., Timber Press (1995).
Bulbous Plants of Southern Africa, by Neil du Plessis and Graham Duncan, Tafelberg Pub. Ltd., Cape Town (1989).
Bulbs for Warm Climates, by Thad M. Howard, University of Texas Press, Austin (2001).
Bulbs, Revised Edition, by John E. Bryan, Timber Press, Portland (2002).