Floral Variation of Micheliα mαudiαe an Endemic Ornamental Tree Endemic in China
65 flowers from 10 plants of Michelia maudiae Dunn in Kunming arboretum were observed. The results show that the numerical, size characters and morphological of their floral parts are varied. There are flower brachyblast with 3 to 5 spathe-like bract scars, tepals 8 to 12, stamens 47 to 97, carpels 15 to 42, 2 to 13 ovules per acarpel. The length of internodes of floral brachyblast was 0.09~2.23 cm; peduncles 0~0.34 cm; length of tepals was 4.33 ~8.72 cm, and width 1.27~5.49 cm; length of stamens 1.00 ~2.34 cm, anthers 0.47 ~1.82 cm, connectivums 0.06 ~0.35 cm, carpels 0.36 ~0.77 cm, stigmas 0.2~0.5 cm. The color of receptacles is light green, yellow or fuchsia. Tepals are obovate, spathulate, oval or lanceolate in shape, white or light yellow, sometimes with yellow or purplish red flush in color. The numerical variance coefficient of floral parts is 7.24%~792.39%. The variance of foliiform scales (244.23%) and the 4th whorled tepals (792.39%) is huge. The variance coefficient of size characters is 13.99%~72.28%; among which the variance of peduncle is the biggest (72.28%). For morphological characters, the variance coefficient is 20.01%~55.64%. The mutation variations mainly occurred in iris flowers (48.79%), the iridescence of tepals (50.60%) and the shape of tepals (55.64%). Analysis of variance showed that variations of M. maudiae flowers mainly occur among strains, and the morphological diversity is very abundant. The research provide basis for the breeding of ornamental individuals or new varieties.
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万方数据
维普
