Fedde's 1901 monograph includes a brief mention of stipules in his Latin description (p. 71):
petiolis ad foliorum insertiones articulatis, saepe articulato nodosis infima parte dilatatis vel subdilatatis et stipulis duobus filiformibus praeditis, rarius carum carentibus.
with rachis ["Blattspindel"] to the leaves inserted articulated, frequently divided with nodes the basal portion of which is broadened ["ein wenig scheidenartig" = sheathlike] or nearly so, and provided with two filiform stipules ["fadenf