CORYPHANTHA. 
HH. Central spines one to several. 
I. Central spines strongly hooked................. 23 
II. Central spines straight or at most curved. 
J. Central spines more or less curved. 
Central spine one, sometimes more in No. 25. 
Radial spines nearly as long as central.... 24. 
Radial spines about half as long as central.. 25. 
Central spines several. 
Radial spines 20 Or more................ 26 
Radial spines 12 or fewer................ 27 
JJ. Central spines straight. 
Radial spines, two kinds (to belooked forhere). 5. 
Radial spines of one kind. 
Plant almost hidden under mass of spines; 
fruit oblong............... 0.020 e eee 
Plant not hidden under mass of spines; fruit 
globular 
DD. Outer perianth-segments ciliate. 
Flowers yellow......... 0... e cece eee eee eect ee ee tee eerececees 
Flowers purplish to pink. 
Inner perianth-segments linear or lanceolate. 
Stigma-lobes purple, apiculate........... 0.0.0... e eee ee eee 
Stigma-lobes white, obtuse or notched. 
Flowers 4 to 7 cm. broad, rose to purple. 
ee 
Plants mostly solitary; inner perianth-segments broadly linear 32. 
25 
. C. palmeri 
C. cornifera 
C. salm-dyckiana 
. C. pallida 
. C. pycnacantha 
C. poselgeriana 
. C. echinus 
. C. durangensis 
. C. chlorantha 
. C. vivipara 
C. neo-mexicana 
Plants mostly cespitose; inner segments linear-lanceolate.... 33. C. arizonica 
Flowers very short, 3 cm. broad, light pink................ 34. C. deserti 
Inner perianth-segments oblanceolate....................000005 35. C. aggregata 
AAA. Seeds black, angled; flowers minute. Series Cubenses.........0.200 cece cee ecaeee 36. C. cubensis 
AA. Ungrouped species......... 0... c ccc ccc ence cette ete eee e ene eeeeeees 37. C. sulcata 
me 1. Coryphantha macromeris (Engelmann) Lemaire, Cactées 35. 1868. 
{ ~ > Mammillaria macromeris Engelmann in Wislizenus, Mem. Tour North. Mex. 97. 1848. 
Mammillaria heteromorpha Scheer in Salm-Dyck. Cact. Hort. Dyck. 1849. 128. 1850. 
1853. 
1853. 
Echinocactus macromerts Poselger, Allg. Gartenz. 21: 102. 
Echinocactus heteromorphus Poselger, Allg. Gartenz. 21; 126. 
Mammillaria dactylithele Labouret, Monogr. Cact. 146. 1853. 
Cactus macromeris Kuntze, Rev. Gen. Pl. 1: 260. 1891. 
Cactus heteromorphus Kuntze, Rev. Gen. Pl. 1: 260. 
Plant branching at base, often many-headed, up to 
2 dm. long; tubercles large, soft, loosely arranged, elon- 
gated, 12 to 30m long, grooved on upper side about 
__two-thirds of their length; spines 10 to 17, slender, the 
radials white; central spines several, black, the longer ones 
5 cm. long; flowers large, purple, 6 to 8 cm. broad; scales 
on flower-tube ciliate; ovary bearing a few scales with 
hairy axils; fruit 15 to 25 mm. long; seeds globose, 
brown but sometimes described as yellow, smooth. 
Type locality: Near Dofiana, New Mexico. 
Distribution: Southern New Mexico, western 
Texas, and Chihuahua, south to Zacatecas, Mexico. 
This species and the following one are not 
closely related to the others of this genus. The 
tubercles are much more elongated and flattened, 
and the groove on the upper surface never extends 
to the base. Sometimes a branch or bulblet is pro- 
duced instead of a flower. 
Here may belong Coryphantha heteromorpha 
Lemaire (Cactées 34. 1868) ; this name is apparently 
erroneously referred to in the Index Kewensis (1: 
624) as Coryphantha heterophylla (see Ariocarpus 
fissuratus, Cactaceae 3: 83). 
1891. 
Fic. 25.—Tubercles of Coryphantha macromeris. 
Mammillaria brownit Toumey was erroneously referred here by Schumann. 
Mammillaria macromeris var. longispina and var. nigrispina are mentioned by Schelle 
(Handb. Kakteenk. 237. 1907). 
