ECHINOPSIS. 
6l 
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. 
Flower-tube slender, nearly cylindric, its scales numerous, small. 
Flowers white. 
Inner perianth-segments acuminate. 
Spines very short or none. 
Areoles nearly spineless. 
Areoles with several spines, 4 to 7 mm. long. 
Spines subulate, 10 to 12 mm. long. 
Inner perianth-segments not acuminate. 
Spines becoming white. 
Spines yellow to gray or brown. 
Inner perianth-segments acute. 
Plant small, 9 cm. in diameter or less; flower 16 cm. long. 
Plant 4 to 5 dm. high, 3 to 3.5 dm. thick; flower 20 to 22 cm. long. 
CC. Spines more or less curved. 
Spines very delicate, central one hooked. 
Spines stout. 
Central spine solitary. 
Radial spines straight. 
Plant about 9 cm. thick, 3 dm. high or less. 
Plant up to 1.5 meters high, 16 to 18 cm. in diameter. 
Radial spines curved. 
Ribs strongly crenate. 
Ribs not strongly crenate. 
Flowers 15 cm. long or less. 
Flowers 20 cm. long or more. 
Central spines several. 
Ribs 13 or 14; spines gray to blackish. 
Flowers straight. 
Flowers curved. 
BB. Flowers yellow. 
A A. Tube of perianth not longer than limb. 
Ribs undulate .. 
AAA. Species not grouped . 
.. 6 . 
E. multiplex 
■ 7 - 
E. oxygona 
. 8 . 
E. eyriesii 
• 9 - 
E. turbinate. 
. 10. 
E. tubiflora 
E. albispinosa 
. 12. 
E. silvestrii 
. 13. 
E. calochlora 
• 14- 
E. cordobensis 
• 15 - 
E. ancistrophora 
. l6. 
E. spegazziniana 
■ 17 - 
E. shaferi 
. 18. 
E. fiebrigii 
■ 19 . 
E. rhodotricha 
. 20. 
E. leucantha 
.2 1. 
E. obrepanda 
.22. 
E. intricatissima 
■ 23- 
E. molesta 
.24. 
E. baldiana 
■ 25. 
E. aurea 
. 26. 
E. bridgesii 
.27. 
E. mamillosa 
.28. 
E. formosa 
1. Echinopsis meyeri Heese, Gartenflora 56: 1. 1907. 
Stems globose or somewhat depressed at apex, xo 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 meyeri 
which is grown in gardens and which, according to Berger, is a hybrid between E. eyriesii 
and E. 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. meyeri Heese is 
kn own to have a single central spine, there may be doubt as to their identification. 
Illustration: Gartenflora 56: pi. 1558. 
Figure 80 is from a photographic copy of the illustration above cited. 
