222 THE CACTACEAE. 



1. RhipsaKs mesembryanthemoides * Haworth, Rev. PI. Succ. 71. 1821. 



Rliipsalis salicornioides* (variety B) Haworth, Suppl. PI. Succ. 83. 1819. 

 Hariola mesembrianthemoides j Lemaire, Cact. Gen. Nov. Sp. 74. 1839. 



Branches very dissimilar; main branches elongated, slender, terete, more or less setose, often 

 bearing aerial roots, covered with short stubby branchlets; these sometimes also bearing short 

 joints, usually less than i cm. long, more or less angled, often with short setae from the small 

 areoles; flower-buds small, pinkish; flowers solitary at areoles of the branchlets, opening in early 

 morning, rather large, 1.5 cm. broad, white or light pink; petals 5, spreading, acute; stamens about 

 20, erect, white; stjde white; stigma-lobes 3, white; fruit short-oblong, 5 mm. long, white or tinged 

 with red. 



Type locality: Not cited where published. 



Distribution: Rio de Janeiro, Brazil. 



The plant is common in cultivation ; in nature it grows in dense masses on trunks of 

 trees. It first flowered in cultivation in England in 1831. Its short joints have a fancied 

 resemblance to species of Mesembryanthemum. 



A dried specimen of Haworth's plant is still preserved in London and through the 

 kindness of N. E. Brown we have a photograph of it. 



Rhipsalis echinata was published as a synonym by PfeifFer (Enum. Cact. 136. 1837). 



Illustrations: Cact. Journ. i : 180; Curtis'sBot. Mag. 58: pi. 3078; Schumann, Gesamtb. 

 Kakteen 633. f. 98, G; Monatsschr. Kakteenk. 2: 9; 4: 59; Arch. Jard. Bot. Rio de Janeiro 

 i: pi. 11; Goebel, Pflanz. Schild. i: pi. 4, f. 7; Loddiges, Bot. Cab. 20: pi. 1920: Thomas, 

 Zimmerkultur Kakteen 58. 



Plate XXIV, figure 9, shows a fruiting plant obtained by Dr. Rose in Rio de Janeiro 

 in 1915 (No. 20246) ; figure 10 shows a flowering plant sent by Alwin Berger in 1908. 



2. Rhipsalis cereuscida Haworth, Phil. Mag. 7: 112. 1830. 



Hariota saglionis Lemaire, Cact. Aliq. 39. 1838. 



Rhipsalis saglionis Otto in Walpers, Repert. Bot. 2: 936. 1843. 



Rhipsalis brachiata Hooker in Curtis's Bot. Mag. 69: pi. 4039. 1843. 



Hariota cereuscula Kuntze, Rev. Gen. PI. i: 262. 1891. 



Rhipsalis saglionis rubrodiscus Lofgren, Arch. Jard. Bot. Rio de Janeiro i : 80. 1915. 



Stems and branches terete ; stem slender, usually elongate, often erect, sometimes 6 dm. high, 

 crowned by a cluster of short branches; upper branches short, 2 to 6 times as long as thick, some- 

 what angled, the areoles bearing 2 to 4 short bristles; flowers terminal or near the ends of the 

 branches, 16 mm. broad; petals about 12, spreading, pinkish to white with yellowish midrib; stigma- 

 lobes 3 or 4; berries white. 



Type locality: Brazil. 



Distribution: Uruguay to central Brazil. 



Illustrations: Curtis's Bot. Mag. 69; pi. 4039; Loudon, Encycl. PI. ed. 3. 1380. f. 

 19408, as Rhipsalis brachiata; Cycl. Amer. Hort. Bailey 4: f. 2101; Stand. Cycl. Hort. 

 Bailey 5: f. 3377; Cact. Journ. i : 180; Monatsschr. Kakteenk. 4: 75, as R. saglionis. 



Plate XXVII, figure 3, is of a plant which flowered in the New York Botanical Garden in 

 March 19 12. Figure 221 is from a photograph of a flowering plant from Misiones, obtained 

 by Dr. Rose in 1915 from Dr. Spegazzini. 



3. Rhipsalis prismatica Riimpler in Forster, Handb. Cact. ed. 2. 884. 1885. 



Hariota prismatica Lemaire, Illustr. Hort. 10: Misc. 84. 1863. 

 Rhipsalis suarezianat Weber, Rev. Hort. 64: 425. 1892. 

 Rhipsalis tetragona Weber, Rev. Hort. 64: 428. 1892. 



Very much branched, prostrate; lower branches elongated and terete; upper branches short 

 and somewhat angled; areoles more or less setose; flowers white; petals usually 5, obtuse; fruit 

 small, pinkish to white, globose. 



* Haworth spelled this R. mesembryanthoides and also R. salicornoides. 



t The Index Kewensis gives the place of publication erroneously as Lemaire, Cact. Aliq. Nov. 39. 1838. 



X According to the Index Kewensis, Rhipsalis suarensis Weber (Diet. Hort. Bois 1046. 1898) is the same. 



