212 ; THE CACTACEAE. 
nearly related to Rhipsalis. This view was taken by Schumann, who had labeled it 
Rhipsalis peruviana Schumann (Vaupel, Bot. Jahrb. Engler 50: Beibl. 111: 19. 1913). 
The plant was collected by A. Weberbauer July 31, 1902 (No. 1353); a fragment of 
the type, which is in the Berlin Herbarium, was sent us by Dr. Vaupel in 1920. 
Figure 211 is from a photograph of a part of the type specimen now in the National 
Herbarium at Washington. 
2. Acanthorhipsalis crenata (Britton). 
Hartota crenata* Britton, Bull. Torr. Club 18:35. 1891. 
Branches lateral, narrowly oblong, very flat, obtuse, 20 to 30 cm. long, 3 to 6 cm. broad, 
strongly crenate, with a stout central axis; areoles between crenations rather large, filled with 
wool and bearing 3 to 8 spines, these 2 to 4 mm. long; flowers red, lateral, small; berry 7 mm. in 
diameter. 
Type locality: Yungas, Bolivia. 
Distribution: Known only from the type locality. 
When first described, this species was thought to be nearest the Brazilian Rhipsalis 
platycarpa, which it resembles, but that species has no spines. 
Figure 212 is from a photograph of Dr. Rusby’s herbarium specimen (No. 2047). 
Fic. 213.—Acanthorhipsalis monacantha. 
3. Acanthorhipsalis monacantha (Grisebach). 
Rhipsalis monacantha Grisebach, Abh. Ges. Wi vyge . 
1 Epiphytic, branching; branches flat and thin, linear-oblong, 2 cm. broad, sometimes 8 dm. 
one obtuse, cuneate at base; serrate (acuminate says Schumann, but figured by him as obtuse); 
areoles white-felted and spiny, spines 1 to 6, but usually only 1 or 2, 5 to 10 mm. long, yellow; 
flowers solitar y at the areoles lateral white i i i eter 
° . D ’ , I cm. lon ; f . in diameter, 
whit 5 is bl kis itt id. g; fruit globular, 8 to 10 mm. 1 
Type locality: Oran, near San Andrés, Argentina. 
Distribution: Northern Argentina. 
. PL: ar ; ; 
This name is printed H. cinerea in the Index Kewensis. 
