Mr. C. RUNGE, San Antonio, Texas.

Messrs. REASONER BROTHERS, Florida.

SPECIES INDEX

Species are listed alphabetically according to Watson's nomenclature. The name(s) that is more likely to be recognised by modern readers is listed in brackets. I have used Anderson's book—The Cactus Family (Timber Press, 2001)—as my main guide. Monographs by Craig and by Pilbeam were invaluable in identifying 'Mamillarias'.

* Plants illustrated in the text.