Crinum yemense alba

0407: field collector took one from Yemen and one from Aden. Unfortunately neither has flowered for me, even though I have cultivated the one from Yemen for 15 years. The latter is certainly large enough to flower now, and I was hoping (again) this year that it would. Both bulbs are episodic in growth pattern; they want to go dormant after 2-3 months of leaf growth, and they are not evergreen. Usually there are two growth cycles per year. They do differ from C.moorei in several aspects though: 1) the bulbs do not form an above ground leaf column like C.moorei; i.e., the leaves die back to the ground surface; 2) the leaves are undulant; and 3) neither bulb has even formed an offset; C.moorei readily offsets in cultivation. There is a recent, large pictorial publication on the flora of Saudi Arabia (don't know the title) that has a field photo of a bulb in bloom. Perhaps you could locate a copy in a botanical library. Dave Lehmiller
0202: Geoff Wilson Austr The blooms of C.yemense are larger,the petals tend to fold back more.As the blooms open they tend to lose all there light pink shading.
I also believe the musk perfume is stronger on C. yemense.
I find the main difference is in the leaves C.moori grows out horizontally were as C. yemense has a more vertical in growth, also there leaves are a lot more tolerant to hot burning summer afternoon sun