. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 33J ASSIMILATION. nutriment fi'om the decaj-ing or decayed remains of other plants ; while others, like Monotiopa uniflora and the Orobanchaceae, ob- tain part of their food from living plants. True parasites obtain their nourishment from living organisms, whereas humus-plants, or saprophytes, live upon the structures of dead ones. From the decaying vegetable mould thej' procure all the ternar3' substances needed for their own fabric, and also the nitrogenous s

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