RHIPSALIS. 
KEY TO SPECIES—continued. 
II. All areoles with appressed bristles.............. 19. 
GG. Ultimate joints 8 to 12 mm. thick. Series 6, Grandiflorae. 
Flowers 2 to 2.5 cm. broad.................00000 000. 20 
Flowers up to 4.cm. broad ................-.00000.. 21 
oe wa 22 
Joints 3 mm. thick; areoles without bristles............... 23 
DD. Flowering areoles large, very woolly, depressed. Series 8, Floccosae 
Ultimate joints much shorter than others; verticillate; plants stiff 24 
Ultimate joints not much shorter than others; plants weak. 
Main branches stout, 8 to 10 mm. in diameter. 
Fruit pure white; Venezuelan species..................0-0000. 25. 
Fruit red or tinged with red; Brazilian and Argentine species. 
Fruit bright red... 2... cece cc cece ceueuee 26. 
Fruit whitish but when mature tinged with red or purple. 
Fruit 5 mm. in diameter; flowers white, becoming yellowish... 27. 
Fruit 8 to ro mm. in diameter; flowers tinged with red, larger 
than the last...................... 28. 
All branches slender, 3 to 6 mm. in diameter. 
Flowers white. ......... 000... ccc cece cece neue ee eeeeeaenenens 29. 
Petals with red tips....... 0.0... ccc cece cece cece ee eeseees 30. 
BB. Joints ribbed or angled, at least when old. 
C. Some joints bristly, others unarmed, ribbed when old. Series 9, Dissimiles.. 31. 
CC. All joints unarmed, angled or winged. 
Joints 5-angled or 5-winged. 
Joints 5-winged; wings crenate. Series 10, Pentapterae............... 32. 
Joints 5-angled; ribs nearly continuous. Series 11, Sulcatae.......... 33. 
Joints 3-angled. 
Angles of joints continuous, wingless. Series 12, Trigonae............ 34. 
Angles of joints interrupted, winged. Series 13, Paradoxae........... 35. 
AA. At least some of joints flat, on same plant or on different plants. 
B. Joints deeply serrate; flowers nodding. Series 14, Houlletianae................ 36. 
BB. Joints repand, entire or crenate; flowers not nodding. 
C. Joints linear to linear-lanceolate. Series 15, Lorentztanae. 
D. Joints both flat and 3-angled or rarely 4-angled, mostly narrowly linear. 
Fruit black. 
Joints 10 mm. wide or less; fruit 5 to 6 mm. in diameter.......... 37. 
Joints 10 to 15 mm. wide; fruit about 10 mm. in diameter......... 38. 
Fruit white to reddish. 
Joints long-acuminate. ......... 0. ccc eee ee ee ce ee ee eee eees 39. 
Joints blunt. 
Joints scarcely crenate; Ecuadorean and Peruvian species....... 40. 
Joints definitely crenate; Costa Rican species................-: 41. 
DD. All joints flat, linear-lanceolate to oblong. 
Joints deeply crenate, the lobes rounded. ..............020-00005 42. 
Joints repand, low-crenate, or nearly entire. 
Joints coriaceous, distinctly crenate............ 6.0. ee eee eee eee 43. 
Joints thin in texture, merely repand or low-crenate. 
Bolivian species... 0.0.0.0... c ce eee ee ee ee eee eee nee 44. 
West Indian and Central American species. 
Larger joints 3 cm. wide....... 0... ... eee cee ee eee eee 45. 
Joints 0.5 to 2.5 cm. wide. 
Perianth-segments 7 to 8 mm. long, greenish white or pinkish 46. 
Perianth-segments 5 to 6 mm. long, green.........-...--- 47. 
CC. Joints elliptic to oblong. Series 16, Crispatae. 
Joints thick, coriaceous. 
Joints oblong, cuneate at base. 
Flowers and fruit usually solitary at areoles...........-.-20+ e202 00> 48. 
Flowers several at an areole. ........ 0... ce eee eee ee eee eens 49. 
Terminal joints short-oblong to elliptic. 
Fruit red... ee ce ce ce ee ee eee eee eee ee teen renee 50. 
Fruit white. .... 0... ccc ccc ee ee ee ce ee eee teen eee ne en ee eeeee 51. 
Joints thin. . 
Brazilian species. 
Joints purplish green, obovate. .......... eee cece ee eee errr eees 52. 
Joints bright green or reddish. | ; 
Joints reddish green, the margins much crisped Lecce eee nee eeees 53- 
Joints bright green, the margins slightly crisped. 
Ultimate joints broad, elliptic to obovate. .........++--+++++- 54. 
Ultimate joints narrow, oblong to narrowly obovate........-- . 55. 
Bolivian species. ..... 6.0. eee e cece eee ee eee e eens neers eens 56. 
AAA. Species not grouped. ......... cece cece eee rece e eee eee een e nee e eer seeerees 57- 
a> AW AH 
OD 
RRR OR wy OR OR 
Dy Dm OR RW RR RW RP 
mm RO 
221 
aculeata 
. grandiflora 
. megalantha 
. leucorhaphis 
. loefgrenti 
neves-armondit 
pittiert 
pulvinigera 
floccosa 
tucumanensis 
gibberula 
punticeo-discus 
dissimilis 
. pentaptera 
. sulcata 
. trigona 
. paradoxa 
. houlletiana 
warmingiana 
gonocarpa 
linearis 
micrantha 
tonduzit 
boliviana 
lorentziana 
ramulosa 
purpusit 
coriacea 
jamatcensts 
. platycarpa 
. russellit 
. elliptica 
pachypter. 
rhombea 
. crispimarginata 
crispata 
. oblonga 
. cuneata 
. roseana 
