This view of the necessity of a large stock of the same species for its preservation, explains, I believe, some singular facts in nature such as that of very rare plants being sometimes extremely abundant, in the few spots where they do exist; and that of some social plants being social, that is abounding in individuals, even on the extreme verge of their range. For in such cases, we may believe, that a plant could exist only where the conditions of its life were so favourable that many could exist together, and thus save the species from utter destruction.
Espezieak irauteko espezie bereko banako asko behar dituela dioen teoria honek azaltzen du, nik uste, natur egoeran gertatzen den zenbait egitate arraro, esate baterako, bakan-bakanak diren zenbait landare noizbehinka oso ugariak izatea aurkitzen diren leku urrietan: edo zenbait landare sozial-sozialak izatea, hau da aletan ugariak, beren barreiapen-eremuko ertz urrunenean ere; izan ere, horrelako kasuetan pentsa dezakegu landare espezie bat, ale asko batera bizi izanik espeziea erabateko suntsipenetik salbatzeko moduko tokian ez bestetan bizi izan zitekeela.