262 PROCEEDINGS OP THE AMERICAN ACADEMY 



Cosiquiriachi, west of Chihuahua. This species has borne flower 

 and fruit with me, and my notes and my recollections indicate that 

 they were central : hence the mark of doubt above, as to the proper 

 position of this species here, where all the other closely allied 

 forms belong. 



5. M. PHELLOSPERMA, E. in B. C. R. (M. tetrancistra, E. in part, Sill. 

 Jour. Nov. 1852) : ovata, subsimplex ; tuberculis teretibus axilla la- 

 nata setigerls ; aculeis radiantibus 40 - 60 biseriatis, exterioribus brevi- 

 oribus tenuioribus, centralibus 3-4 robustioribus atrofuscis inferiore 

 s. pluribus hamatis ; floribus lateralibus ; bacca pyriformi subsicca coc- 

 cinea ; seminibus globosis rugosis nigris massa fusca suberosa majore 

 arilliformi auctis. 



From the Gila to the eastern slope of the California mountains. 

 — The name originally given had to be altered, because very rarely, 

 if ever, are 4 hooked spines seen. In the original description this 

 and the next species were confounded. — Plant 2-4 inches high. 

 Radial spines 4-6 lines, central ones 5-9 lines long. — Apparently 

 near M. ancistroides, Lem., which, however, has the radial spines 

 all homogeneous. 



6. M. Grahami, E. 1. c. : subglobosa, simplex s. demum e basi ra- 

 mosa ; tuberculis ovatis, axilla nudis ; aculeis radiantibus 20-30 uni- 

 seriatis, centrali sursum hamato fuscato, additis sajpe 1-2 superiori- 

 bus rectis ; floribus lateralibus rubicundis ; bacca ovata virescente ; 

 seminibus minutis scrobiculatis nigris. 



Mountains from El Ejxso southward and westward to the Gila and 

 Colorado, and up the latter river : fl. from June or July to August. — 

 Plant 1-3 inches high ; hooks much longer than the radial spines, 

 which are 3-6 lines long. Flowers below the top, nearly one inch 

 in diameter. Berry and seed small, the latter only 0.4 line long. 



7. M. Wrightii, E. 1. c. : depresso-globosa, simplex ; tuberculis 

 teretibus axilla nudis ; aculeis radiantibus sub 12 albidis ; centralibus 

 sub-binis uncinatis fuscis vix longioribus ; floribus lateralibus (?) pur- 

 pureis ; bacca subgloboso-ovata majuscula ; seminibus scrobiculatis 



. nigris. 



New Mexico, on the Pecos and near the Copper Mines. — Plants 

 1|- 3 inches in diameter. Spines 4-6 lines long. Flowers fully 

 one inch in diameter, bright purple, with narrow acuminate petals. 

 Berry large and purple : seed 0.7 line long. 



8. M. GooDRicHii, Scheer : ovato-globosa, subsimplex ; tuberculis 



