Key 1: Plants without developed leaves, which are very reduced in size or have become spines

1		Plant is ground-growing (sometimes slightly prostrated or leaning), without spreading tendrils		Leptocereus ekmanii
		Epiphytic, semiepiphytic or climbing plants, with spreading tendrils		2
2 (1)		Stems slim (less than 1 cm diameter), cylindrical, smooth; flowers and fruits small (less than 1 cm)		Rhipsalis baccifera
		Stems over 1 cm diameter, angular or ribbed, flowers and fruits large (more than 4 cm)		Selenicereus grandiflorus