(Ahem) Roses don’t have thorns, Thorns are modified modified stems. Spines (as in cacti) are modified leaves. The projections on roses etc. are technically prickles, i.e., they are modifications of the epidermis (or bark).
January 10, 2015
June 13, 2017
October 16, 2017
(Ahem) Roses don’t have thorns, Thorns are modified modified stems. Spines (as in cacti) are modified leaves. The projections on roses etc. are technically prickles, i.e., they are modifications of the epidermis (or bark).