pulcherrimus 



roseus miniatus 



schmidtii 



tettani 



quilliardetti 



roseus splendidus 



sellowii 



tricolor 



raveaudii 



roydii 



specillimus 



undiflorus 



rebuti 



ruber 



speciosissimus 



vandesii 



reichei 



ruber perfectus 



speciosissimus grandiflorus 



vonhoffini 



reineckii 



ruber violaceus 



speciosus roseus 



vitellinus 



roseus carmineus 



sarniensis 



splendens 



warscewiczii 



roseus carneus 



schaffieri 



splendidus 



wittmackianus 



roseus floribundus 



schallerianus 



stenesi 





roseus grandidissimus 



schlinuni 



superbissimus 





Cactus ensiformis Biden, Card. Chron, II. 20: 53. 1883. 



This is evidently some Epiphyllmn hybrid. It was sent to H. B. Biden from Manchester, 

 England, in 1883 and flowered the same year. Its flowers were described as 6 inches 

 across, white, richly scented, and remaining open for 3 days. 



Cactus speciosus grandiflorus (Monatsschr. Kakteenk. 14: 11. 1904) is supposed to be 

 some hybrid Epiphyllum. 



Fig. 203. — Tip of branch with flower of Disocactus biformis. X 0.8. 



5. DISOCACTUS Lindley in Edwards's Bot. Reg. 31 : pi. 9. 1845. 

 Disisocaclus Kunze, Bot. Zeit. 3: 533. 1845. 

 Irregularly branching, spineless epiphytes, the stem terete; branches numerous, flattened; 

 areoles marginal; flowers diurnal, borne near tips of branches, nearly regular; tube shorter than 

 limb; perianth-segments few, elongated, spreading; ovary small, cylindric, elongated, bearing a 

 few minute scales; fruit globular to ovoid, not at all angled. 



Fig. 204. — Disocactus biformis. 



Type species : Cereus biformis Lindley. 

 We recognize two species, both from Central America. 



The name is from 8is twice, and kolktos cactus, and was given because the perianth- 

 segments of the inner and outer series were equal in the type specimens. 



