Studies on the Constituents of Alpinia. XII. : On the Constituents of the Seeds of Alpinia Katsumadai HAYATA. (1).
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From the seeds of Alpinia katsumadai HAYATA, alpinetin (A) (7-hydroxy-5-methoxyflavanone) and a compound (B), whose structure has been established as 2', 4'-dihydroxy-6'-methoxychalcone by both spectroscopic methods and derivation from the known compound (A), were isolated by chromatography. The compound (B) was named cardamomin.Keywords:
Alpinia
Zingiberaceae
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lectotypitied many of the taxon names.However, three Australian species names remain to be lectoty pitied.This is accomplished here.
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Alpinia
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Alpinia
Zingiberaceae
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Alpinia
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Zingiberaceae
Alpinia
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Zingiberaceae
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We studied the light effects on style curvature and anther dehiscence of Alpinia mutica.The results showed that light did not change the style movement directions of cata鄄morph, neither the anther opening time.The first style curvature of ana鄄morph moved downwards in darkness, and moved upwards in light.Meanwhile, the an鄄 ther did not dehisce in darkness, but dehisced in light.The second style curvature of ana鄄morph depended on the light condition of first curvature.If kept in darkness all the time after first downward curvature, the styles did not move upwards and the anther did not dehisce.If first curvature occurred in light, the styles curved downwards both in darkness and light conditions.This research indicated that under different light conditions the combinations of style and anther states in two morphs made the stigma untouch the pollen from the same flower and therefore guaran鄄 teed the herkogamy and dichogamy.Although the behavior of style and anther in two morphs were similar, the mech鄄 anisms that regulated these behavior were different.
Zingiberaceae
Alpinia
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Alpinia
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Zingiberaceae
Alpinia
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Alpinia newmanii , a new species from central Vietnam, is described and illustrated. A morphological comparison with the most closely related species and a key to the species of Alpinia subsection Catimbium in Vietnam are provided.
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Zingiberaceae
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