NEOMAMMILLARIA. 



79 



Type locality: Not cited. 



Distribution: Central Mexico. 



This plant is very common in central Mexico, especially in the Valley of Mexico, 

 about Tula, farther north, and also east of the City of Mexico. It makes large cespitose 

 mounds, sometimes with many-headed branches, and has peculiar incurved spines and 

 small flowers. It is frequently collected and has been shipped abundantly to Europe, 

 where it has been much named, often from single joints. Our synonymy shows 34 specific 

 names under Mammillaria and nearly as many under Cactus. Some writers have given 

 these names varietal rank, so that this species now has about 100 names. It is a very 

 characteristic plant and, while it may easily be confused with other species, yet, when 

 clearly understood, its distinctness is evident. 



Mammillaria zooderi was referred by Schumann (Gesamtb. Kakteen 582. 1898) as a 

 synonym of M. centricirrha but the Index Kewensis Suppl. 5. cites Schelle (Handb. 

 Kakteenk. 268. 1907), who gives it as a synonym of M. centricirrha zooderi. Neither the 

 specific nor the varietal name can be considered published. 



Schelle (Handb. Kakteenk. 266 to 268. 1907) lists 62 varietal names of Mammillaria 

 centricirrha, all but one or two of which are based on species of the same name. Some of 

 these perhaps are to be referred elsewhere, but we have listed them here as follows: 



amoena 



falcata 



lactescens 



posteriana 



arietina 



foersteri 



lehmannii 



pulchra 



bockii 



gebweileriana 



longispina 



recurva 



bouchcana 



gladiata 



macracantha 



schiedeana 



ceratophora 



glauca 



magnimamma 



schmidtii 



cirrhosa 



globosa 



megacantha 



spinosior 



conopsea 



grandidens 



microceras 



subcurvata 



cristata 



guilleminiana 



montsii 



tetracantha 



deflexispina 



hopfferiana 



moritziana 



uberimamma 



destorum 



hystrix 



neiunanniana 



valida 



de tampico 



hystrix grandicornis 



nordmannii 



versicolor 



diacantha 



hystrix longispina 



obconella 



viridis 



diadema 



jorderi 



pachythele 



zooderi 



divaricata 



krameri 



pazzanii 



zuccariniana 



divergens 



krameri longispina 



pentacantha 





ehrenbergii 



krausei 



polygona 





The following garden names arc listed by Schumann (Gesamtb. Kakteen 582 

 belonging to this species: 



1S98) as 



boucheana 



hystrix 



moritziana 



tetracantha 



destorum 



jorderi 



nordmannii 



viridis 



de tampico 



lehmannii 



obconella 



zooderi 



grandicornis 



longispina 



posteriana 





grandidens 



montsii 



spinosior 





Illustrations: Hort. Beige 5: pi. 6, as Mammillaria conopsea; Reiche, Elem. Bot. f. 

 166, as M. centricirrha. Schelle's figure (Handb. Kakteenk. 268. f. 189) we are not able to 

 place. The illustration in Bliihende Kakteen (i : pi. 32) as M. centricirrha var. does not 

 seem to be of this relationship. 



Plate XI, figure i, shows a small potted plant which flowered in the New York Botanical 

 Garden, May 6, 1913. Figure 71 is from a photograph of a plant obtained on the pedregal 

 near San Angel, Valley of Mexico, by O. Solis in 19 19. 



14. Neomammillaria macracantha (De Candolle). 



Mammillaria macracantha De Candolle, Mem. Mus. Hist. Nat. Paris 17: 113. 1828. 



Cactus macracanthus Kuntze, Rev. Gen. PI. i: 260. 1891. 



Cactus alternalus Coulter, Contr. U. S. Nat. Herb. 3: 95. 1894. 



Mammillaria centricirrha macracantha Schxmiann, Gesamtb. Kakteen 582. 1898. 



Depressed-globose, 2 to 3 cm. high, 6 to 15 cm. in diameter; axils of old tubercles naked, of 

 young ones densely lanate; tubercles ovoid, somewhat 4-sided; young spine-areoles somewhat 

 tomentose; spines i or 2, somewhat angled, elongated, the longest 5 cm. long (but not elongated 



