SCHLUMBERGERA. 183 
of that species by Regel. In 1890 Schumann considered them distinct species but congen- 
eric; in 1897 he referred them to different genera. Both species are native of Brazil. 
These plants have usually been associated with Zygocactus truncatus and all included 
in Epiphyllum. . Although resembling Zygocactus very much in habit, they differ from it in 
flower and fruit characters. The flowers are nearly regular, not strongly oblique; are 
nearly rotate, not elongated; the stamens are of equal length and in a cylindric cluster 
shorter than the style, not of unequal lengths and in a flattened cluster, not extending 
beyond the style; the ovary and fruit are strongly angled, not terete. 
Lemaire named the genus for Frederick Schlumberger, an amateur student of plants 
and a collector of cacti, begonias, and bromelias. 
Key TO SPECIES. 
Flowers scarlet... 0. cc cece cece eee ee teen ee ee ee eee eee n eee teen en ee eres en eres enens 1. S. gaertnert 
Flowers purplish. ........ 00. e cee cee cece eee eee eee cnet teen ener ne eeen nesses eernnes 2. S. russelliana 
1. Schlumbergera gaertneri (Regel) Britton and Rose, Contr. U. S. Nat. Herb. 16: 260. 1913. 
Epiphyllum russellianum gaertnert Regel, Gartenflora 33: 323. 1884. 
Epiphyllum makoyanum W. Watson, Gard. and For. 2: 243. 1889. 
Epiphyllum gaertneri Schumann in Martius, Fl. Bras. 47: 218. 1890. 
Phyllocactus gaertnert Schumann in Riimpler, Sukkulenten 147. 1892. 
Fic. 192.—Schlumbergera gaertneri. 
Branches spreading, the terminal ones often pendent; joints usually flattened, but sometime: 
3 to 6-angled, fleshy, 5 cm. long or more by 2 cm. broad, dull green except t e purplish c 
margins; areoles small, with short white wool and a few yellowish bristles; flowers I to 3, usua y 
all at distal end of the terminal branches, 4 cm. long, dark scarlet; outermost perianth-segmen’s 
usually 5, short, thick, triangular, drying separately from the others; outer pete vsegmen s 
spreading; innermost perianth-segments more erect, nearly distinct, acute; al of 7 segments, 
except the 5 outer ones, more or less coalesce and withering, remaining on top of ov ary oO ary ‘owned 
by a slightly depressed disk or umbilicus with upturned margin, which passes into . flow ue 
on the margin are borne the free stamens; style slender, 1.5 cm. long, red; stigma: oO ; , ine rs 
cream-colored; ovary dark red, angled, 12 mm. long; fruit red, oblong, 15 mm. long, depress 
apex, in cultivation ripening in July. | 
