Discussion
With respect to adhesion and cohesion of stamens, identify the INCORRECT statements.
P. Adnation of stamens to petals is described as epiphyllous stamens
Q. In Calotropis, stamens and carpels are united to form gynostegium
R. In syngenesious stamens, filaments are united to form a bundle while the anthers are free
S. Synandrous stamens found in Cucurbita represent the union of filaments as well as anthers
Answer: B
The incorrect statements are P, R.
P is incorrect: stamens attached to petals are epipetalous. 'Epiphyllous' is used for stamens attached to the perianth (tepals), as in lilies, where petals and sepals are not distinct. R is incorrect because it reverses the definition: in syngenesious stamens the anthers are united into a tube while the filaments stay free, as in the sunflower family. Filaments united into a bundle with free anthers is the adelphous condition.
Q is correct: in Calotropis the stamens fuse with the stigma to form a gynostegium. S is correct: in synandrous stamens, as in Cucurbita, both filaments and anthers are fused.
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