a Young plant of C. abyssinica (N. Holstein 132). The first node is in the axilla where the glabrous cotyledons split off. The first nodes lack probracts and tendrils b Young plant of C. sessilifolia (N. Holstein 131). The first leaves in this species are petiolate, sessile leaves are produced later-on. The glabrous cotyledons are already dried (plant had the same age as the one in Fig. 4a).