|Title||A preliminary account of the North American species of Leccinum, sections Luteoscabra and Scabra|
|Publication Type||Journal Article|
|Year of Publication||1967|
|Authors||Smith AH, Thiers HD, Watling R|
The present paper, in which sections Luteoscabra and Scabra are treated, is a continuation of our studies on Leccinum directed toward an eventual monograph. The problems encountered are generally similar to those discussed previously for section Leccinum. We encountered certain variations in the color of the spore deposit which we regard as significant, and have had the same difficulties in the interpretation of the blue staining of the flesh when injured and hence have avoided emphasizing this feature at the species level. In some species pleurocystidia apparently are lacking but we have not emphasized this feature in delimiting taxa as we believe many more observations are necessary before the absence of such cystidia can be established as a constant character. In Leccinum leptocystidia are typically present though at times difficult to demonstrate. As we found when studying section Leccinum the structure of pileus cuticle is of the utmost importance in the taxonomy of the group.