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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 setigeris ; 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 ssepe 1-2 superiori- 
bus rectis; floribus lateralibus rubicundis; bacca ovata virescente; 
seminibus minutis scrobiculatis nigris. 
Mountains from El Paso 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. Wrightil, 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 
New Mexico, on the Pecos and near the Copper Mines. — Plants 
\\ -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. Goodrich, Scheer: ovato-globosa, subsimplex; tuberculis 
fat 
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