roof-glass

Updated: June 19, 2025

Neither of these plants will flower unless it is grown in a sunny position as near to the roof-glass as is possible. One of the best of the dwarf-stemmed kinds. It has a pale green stem, about 6 in. high, rarely branching at the base, but often found growing in clusters.

W. Watson - Cactus Culture for Amateurs : Being Descriptions of the Various Cactuses Grown in This Country, : With Full and Practical Instructions for Their Successful Cultivation