Hello: Here is another article which might help. But it's just a cache files.(The seconed link is the cache.) http://google.com/url/… http://72.14.253.104/search/… Here is the some conclusion maybe someone would be interested in. "The duration between flower or inflorescence initiation and anthesis varies greatly between genera (Table 1.3). Amaryllis belladonna, Hae- manthus/Scadoxus, Hippeastrum, Leucojum, and Nerine require a min- imum of 12 months to differentiate and develop an inflorescence. For the other genera, the period is less than 12 months. In Haemanthus/Sca- doxus ‘König Albert’, the youngest floret is at “Stage G” in late summer, six months after inflorescence initiation, but during the remainder of the cycle (9 to 10 months) limited development takes place (Peters 1971). In hardy Narcissus, the period from initiation to “Stage Pc” is only 2 to 3 months (Cremer et al. 1974). However, to reach anthesis requires eight more months. In Hippeastrum, the time to reach “Stage G” (VI) is only three months (Blaauw 1931), while in Leucojum aestivum it is only two months (Luyten and Van Waveren 1938). In Amaryllis belladonna (Hartsema and Leupen 1942), Hippeastrum (Blaauw 1931), and N. bowdenii (Theron and Jacobs 1994a), reproduc- tive development begins immediately after the initiation of the last leaf primordium. In contrast, with Galanthus nivalis (Luyten and Van Wav- eren 1952), Haemanthus/Scadoxus ‘König Albert’ (Peters 1971), and Lycoris species (Mori and Sakanishi 1977), several months occur between the initiation of the last leaf primordium and inflorescence ini- tiation. In all genera reviewed, the new vegetative cycle begins imme- diately after the initiation of the flower or inflorescence. The average number of appendages in a vegetative cycle of the bulbous Amaryllidaceae varies greatly. In Amaryllis belladonna, it is 11 (Hart- sema and Leupen 1942), 3 in Galanthus nivalis (Luyten and Van Wav- eren 1952), 15 in Haemanthus/Scadoxus ‘König Albert’ (Peters 1971), 4 in Hippeastrum (Blaauw 1931), 7 to 8 in Leucojum aestivum (Luyten and Van Waveren 1938), 5 to 10 in Lycoris (Mori and Sakanishi 1977), and 6 to 10 in Nerine bowdenii (Rees 1985d; Theron and Jacobs 1996a). The genera bear inflorescences consisting of 1 to over 100 florets (Table 1.4). The number, and in some cases flower size, is dependent on bulb size. These florets are very often arranged in two bostryces. How- ever, some species have florets that are not arranged in this manner. Genera that originate in climatic regions with dry, warm summers, e.g., Amaryllis belladonna, Narcissus spp., Nerine sarniensis, and N. flexuosa, require warm storage temperatures during summer (Table 1.7)." I thinks that: And the temperature range and length which is sufficient are also very important. Just as the lilium bulbs in a temperature around 0-5 degree C need 2-3 month(By variety) to break dormancy. But in the natural environment, the temperature periods which below the 0 C will freeze all activities (lengthen the time to wake up) and the temperature too high will cause a reverse action such as devernalization. Not only the major temperature range is sufficient, but also the extreme periods are also a factor. Fierycloud, Taiwan (USDA Z11+, AHS Z12+) ____________________________________________________________________________________ 杜絕網路駭客，保障帳號安全 - 馬上設定 Yahoo!奇摩安全圖章http://tw.info.yahoo.com/seal/index.html