The photosynthetically efficientC4 plantsviz Amaranthus viridis, Euphorbia hirta and aC3 plant,Acalypha indica with mosaic leaf pattern showed the maximum amount ofB vitamins when compared to the otherC3 plants. It is observed that photosynthesis and vitamin synthesis go hand-in-hand showing close correlation. The results also indicate that there is a close relation between chlorophyll content and vitamin content. However, there appears to be no relation between phyllotaxy and photosynthesis. Between the twoC3 plants,viz., Acalypha andCarica, the photosynthetic inefficiency of the latter might be due to more of chlorophyllb and less of chlorophylla as seen from chlorophylla/chlorophyllb ratios.