Pfeiffera monacantha

(Gris)Heath

◊ Calyx 4(4):158 (1994)
◊◊ Rhipsalis monacantha Griseb - Abb. Köfn. Ges. Wiss. Göttingen 24:140 (1879)
Hariota monacantha (Gris)Küntze - Rev. Gen. Plant. 1:263 (1891)
Acanthorhipsalis monacantha (Griseb)Br&R - Cact. 4: 212 (1923)
Acanthorhipsalis incahuasina Card - Cactus (Paris) 5(34):127 (1952)
Rhipsalis monacantha samaipatana Card - NCSJ 12: 85 (1957)
Acanthorhipsalis monacantha samaipatana (Card)Backbg - Backeberg 2:701 (1959)
Lepismium monacanthum (Gris)Barth - Bradleya 5:97-100 (1987)
Pfeiffera incahuasina (Card)Heath - Calyx 4(4):158 (1994)

- Upright, later hanging. Laterally branching from the lower areoles, sometimes more apically. Stems 2-3 cm br, up to 45 cm long, flat or with three or more angles, serrate. Areoles 1 mm diameter, up to 2 cm apart. Spines 0-6, up to 1 cm long, yellowish or whitish, upright or spreading. Older areoles have more spines. Flower lateral, up to 1.5 cm long, 1.2 cm diameter, orange. Ovary 6 mm diameter, green or reddish, sharply four- to five-angled, with 2-5 scales and felt. Petals 1 cm long, 0.5 cm broad. Stamens whitish, style white or cream. Fruit orange, later light pink, up to 1 cm diameter. Seed dark brown, pear-shaped, 1.5 mm.

- Bolivia: Cochabamba, La Paz, Santa Cruz, Chuquisaca, Tarija; Argentina: Jujuy (Calilegua), Salta (T: San Andrés, west of San Ramón de la Nueva). Epifytic, 300.2000 m. Flowering period southern winter and spring.

Cact. 4:212"
An. Mus. Hist. Nat. Buenos Aires 32:477 (1925)
Backeberg 2:701
CSJ(USA) 24():176; 55(4):177; 67():37-39
Succulenta 66(1):20"
Bradleya 5:97-100"; 13:45"; 18:10
KuaS 37:0"; 43():94-95; 49(1):2",5"; 50(5):127
EPIG 8(4):132"; 10(3):77|, 83'
NCL 232"