Some new species and distribution records of Rhizopogon in North America

Abstract

The following 12 new species and two varieties of Rhizopogon are described from collections made around Nelson, British Columbia, and Santa Fe, New Mexico: R.amoenus Harrison and Smith, R.armeniacus Harrison and Smith, R. canadensis Harrison and Smith, R. cinnamomeus Harrison and Smith, R. columbianus Harrison and Smith, R. inversus Harrison and Smith, R. pachydermus Harrison and Smith, R. pinyonensis Harrison and Smith var. pinyonensis, R. pinyonensis var. sublutescens Harrison and Smith, R. pinyonensis var. albidus Harrison and Smith, R. praestans Harrison and Smith, R. singularis Harrison and Smith, R. tephrogleba Harrison and Smith, and R. vestitus Harrison and Smith. Additional information is presented on four recently described species, and the ranges of 29 species are extended. It has been found that, when rainfall conditions are favorable, a distinctive and characteristic Rhizopogon flora occurs under pinyon pines in the pinyon pine – juniper forests of the arid regions of the south west.