Abstract
A re-examination of populations of Aloina bifrons from the Mojave Desert of Nevada was prompted by observations of frequent sporophytic populations. Sporophytic populations are unusual for xeric dioicous species. Aloina bifrons, previously described as dioicous, was found to be occasionally rhizoautoicous. Ramets bearing perichaetia and ramets bearing perigonia were at times connected beneath the ground surface by single rhizoids, rhizoid strands, or by masses of rhizoids. Rhizoautoicy probably functions in increasing spore production in environments unconducive to fertilization.
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