DISOCACTUS. 201 
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 schlimmi superbissimus 
CACTUS ENSIFORMIS Biden, Gard. Chron, II. 20: 53. 1883. 
This is evidently some Epiphyllum 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. 
Fic. 203.—Tip of branch with flower of Disocactus biformis. X 0.8. 
(/ { D) 5. DISOCACTUS Lindley in Edwards’s Bot. Reg. 31: pl. 9. 1845. 
: Disisocactus 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. 
Fic. 204.—Disocactus biformis. 
Type species: Cereus biformis Lindley. 
We recognize two species, both from Central America. —_ 
The name is from dis twice, and xaxros cactus, and was given because the perianth- 
segments of the inner and outer series were equal in the type specimens. 
