: An Illustrated Flora of the Northern United States and Canada [17] Authors : Nathaniel Lord Britton and Addison Brown [17]
: A highly regarded, detailed botanical guide covering various plant species, such as Mammillaria rhodantha (cacti) found in regions like Mexico [5.1, 5.4].
The phrase "" appears to be a descriptive label for a specific digital archive or file (likely named 22642.rar ) containing a high-quality scan or comprehensive digital version of this three-volume work [17]. Reference Details