ECHINOPSIS. 61 
KEY To SPECIES—continued. 
Stems globular or thicker than long or sometimes clavate, never slender. 
Flowers red. 
Flower-tube distinctly enlarged above, its scales distant, large......... 6. E. multiplex 
Flower-tube slender, nearly cylindric, its scales numerous, small......... 7. E. oxygona 
Flowers white. 
Inner perianth-segments acuminate. 
Spines very short or none. 
Areoles nearly spineless. ..........0000 0. cee eee ce eee ee eee ees 8. E. eyriesii 
Areoles with several spines, 4 to 7 mm.long...................... 9. E. turbinata 
Spines subulate, 10 to 12 mm. long................................10. E, tubiflora 
Inner perianth-segments not acuminate. 
Spines becoming white................00 000 e cece e eee ee eee sees ees dd. E, albispinosa 
Spines yellow to gray or brown. 
Inner perianth-segments obtuse...............0..020200200......12. E, silvestrit 
Inner perianth-segments acute. 
Plant small, 9 cm. in diameter or less; flower 16 cm. long........13. E. calochlora 
Plant 4 to 5 dm. high, 3 te 3.5 dm. thick; flower 20 to 22 cm. long. .14. E. cordobensis 
CC. Spines more or less curved. 
Spines very delicate, central one hooked............. 000020500 ee eeeeeeess 15. E, ancistrophora 
Spines stout. 
Central spine solitary. 
Radial spines straight. 
Plant about 9 cm. thick, 3 dm. high orless...............-...........16, E. spegazsiniana 
Plant up to 1.5 meters high, 16 to 18 cm. in diameter..................17. E. shaferi 
Radial spines curved. . 
Ribs strongly crenate......... 0000 c eee cee eee eee ce eee TB. E. frebrigii 
Ribs not strongly crenate. . 
Flowers 15 cm. long or less.........- 020 e eee ee teeter e eee ees 19 E. rhodotricha 
Flowers 20 cm. long or more. 
Central spine up to 10 cm. long... .........6 20-26 ee ee eee 20. E. leucantha 
Central spine about 2.5 cm. long...........- 62-000 e eee eee 20. E. obrepanda 
Central spines several. oo, 
Ribs 16; spines at first rose......--. 0.0.05 ee ee 22. E, intricatissima 
Ribs 13 or 14; spines gray to blackish. 
Flowers straight... ..........).+5+805- .23. E. molesta 
Flowers curved... ....cccccece cee cecc settee rete teeter eee 2h. E, baldiana 
BB. Flowers yellow............0 00:2 cece e rece teeters Doce cecevevess.s «25. E. aurea 
AA. Tube of perianth not longer than limb. . . 
Ribs not undulate ..... ccc. cece cece cc cece eee e eee eee eee t eee eee es 26, E, bridgesti 
Ribs undulate .......... cece cece ect teen eect eee nee te ee BT E. mamillosa 
_....28. E. formosa 
AAA. Species not grouped... 0.0.0.0... ce cee cnet teen eet enn e ees rene 
1. Echinopsis meyeri Heese, Gartenflora 56:1. 1907. 
Stems globose or somewhat depressed at apex, 10 cm. in diameter, pale green; ribs 14 to 16, 
acute, usually straight; spines subulate, all straight, rosy below, brown or black above, but in age 
nearly white; radial spines 7 or 8; central spine solitary, flowers numerous, lateral, 15 to 20 cm. long ; 
all perianth-segments long, threadlike, twisted, the outer ones brownish, the inner dull white; axils 
of scales on ovary and flower-tube bearing many long hairs; stigma-lobes cream-colored. 
Type locality: Paraguay. 
Distribution: Paraguay. . 
We have not seen specimens of this species, but the type was illustrated; so far as we 
know it is not in cultivation. This should not be confused with the Echinopsis meyert 
which is grown in gardens and which, according to Berger, is a hybrid between FE. eyriesi 
and £. leucantha. . 
This plant is remarkable among cacti for its very narrow perianth-segments. 
Haage and Schmidt offer a plant under this name for sale. It suckers very freely, 
both on the side and near the top of the plant and these begin to send out roots while still 
attached to the parent plant. They are covered with short brown spines. We do not 
know the origin of Haage and Schmidt’s consignment and we have seen only very small 
plants from it. As these all show several central spines, while the E. meyert Heese is 
known to have a single central spine, there may be doubt as to their identification. 
Illustration: Gartenflora 56: pl. 1558. 
Figure 80 is from a photographic copy of the illustration above cited. 
