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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.

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A correlational study of scores on the McCarthy Scales of Children's Abilities and the Wechsler Intelligence Scale for Children and the Stanford-Binet was conducted as an effort to demonstrate validity for the McCarthy scales. While the Binet IQ was related to the McCarthy Verbal score and General Cognitive Index, the WISC subtest scores and IQs were significantly related to McCarthy scale scores. The results indicated a lack of specificity among McCarthy scale index measures and an ambiguous definition of the General Cognitive Index.

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