flA. iv- <2^- 
I y 
*k A 
ssepe 2 - 3 minoribus; stigmatibus 8; bacca obovata ; seminibus un- 
dulato-marginatis majusculis. 
Var. j3. Montana : subiqermis ; stramineo-setosa. 
Along the Canadian River east of the Llano Estacado,-and on that 
plain. Var. p. near Albuquerque. — Joints 2£ - 3 inches in diameter, 
in jS, larger; longer spines 1-2 inches long. Fruit short, pulpy, 
sweet. Seed 2£ lines in diameter, with a very sharp irregularly wavy 
or twisted border. — The var. /3. seems to unite the common O. Raji - 
nesquii with this form. 
O. stenochila, E. & B. 1. c. : prostrata ; articulis obovatis ; pulvil- 
lis remotis stramineo-setosis, superioribus solum armatis ; aculeis sin¬ 
gulis albidis patulis, 1-2 minoribus deflexis ssepe adjectis ; bacca obo¬ 
vata clavata ; seminibus crassis anguste marginatis. 
Zuni, Western New Mexico. — Joints 4 inches long and 3 wide; 
spines 1-1£ inches long. Fruit green or pale red, very juicy, If or 
sometimes even 2£ inches long. Seeds quite peculiar, regular, much 
thicker in proportion than those of most other Opuntice , and with a 
very narrow edge. —Another form, with smaller and rounder joints, 
more spines, smaller fruit, but similar seeds, was found ^in the same 
neighborhood. 
All the forms described above have fibrous roots. The following 
are principally characterized by their bulbous or tuberous roots, but 
can hardly be otherwise distinguished from the forms already de¬ 
scribed. Both are found westward of the range of O. Rajinesquii 
proper, and may be considered as subspecies, the peculiarities of 
which are readily propagated by seeds. 
O. macrorhiza, E. in PI. Lindh. part 1 : prostrata, ssepe adscen- 
dens, radicibus tuberosis; articulis obovato-orbiculatis perviridibus; 
pulvillis subremotis rufo-setosis, superioribus solum armatis; aculeis 
singulis validis ssepe variegatis patulis, 1-2 gracilioribus deflexis sub- 
inde additis ; alabastro acuminato ; petalis circiter 8 sulphureis basi 
miniatis; stigmatibus 5 ; bacca obovata basi clavata, umbilico lato; 
seminibus subregularibus compressis minoribus. 
Sterile, rocky places on the Upper Guadalupe River, in Texas : fl. 
May a^id June. — Roots in young specimens fusiform, in old ones 
enlarged to fleshy tubers, sometimes 2 or 3 inches in diameter. 
Joints 2^-3J inches long, the leaves and bristles the same as in 0. 
Rajinesquii. Flowers 3 inches in diameter. Fruit green or pale 
purple, smaller and sweeter than that of O. Rajinesquii. 
Botanical 
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