From what I understand, D. sessifolia[Edit: D. sessilifolia] is a smaller plant than D. burmannii. Tre, my limited experience is that D. burmannii germinates like D. capensis, if ya know what I mean. Twice I have had high germination rates. In contrast, D. sessifolia[Edit: D. sessilifolia] seeds was 0 %. But that was my experience and limited at that.