Elementary botany (1898) Elementary botany elementarybotany00atki Year: 1898 #i^^ r:..c 4x9, Section ol fruit body or apothecium of lichen (parmelia), showing asci and spores of the fungus. distinct from that of either of the organisms forming the component parts. This community of existence between two different organisms is called by some vtutuaiism, or 1 Nitrogen gatherers. 599. How clovers, peas, and other legumes gather nitrogen. It has long been known that clover plants, peas, beans, and many other Leguminous plants arc often able to thrive in soil where the cereals do but poorly. So
Elementary botany (1898) Elementary botany elementarybotany00atki Year: 1898 #i^^ r:..c 4x9, Section ol fruit body or apothecium of lichen (parmelia), showing asci and spores of the fungus. distinct from that of either of the organisms forming the component parts. This community of existence between two different organisms is called by some vtutuaiism, or 1 Nitrogen gatherers. 599. How clovers, peas, and other legumes gather nitrogen. It has long been known that clover plants, peas, beans, and many other Leguminous plants arc often able to thrive in soil where the cereals do but poorly. Soil poor in nitrogenous plant food becomes richer in this substance where clovers, peas. are grown, ami the} are often planted tor the purpose o( enriching the soil. Leguminous plants, espe- ^ ciallv in poor soil, are almost certain to have en- largements, in the form of nodules, or •• root tubercles.' A root k^[ the common vetch with some ot these root tubercles is shown in fig, 420. 600. A fungal or bacterial organism in these root tubercles. If we cut one ot these root tuber- cles open, and mount a small portion o[ the in- terior in water tor examination with the micro- SCOpe, we will find -mall nut-shaped bodies,
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