Vol. 46 No. 6 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
JUNE, r919 

New and old species of Opuntia 
DAviIp GRIFFITHS 
(WITH PLATES 9 AND 10) 
It is desirable again to record a few facts resulting from our 
culture of species of Opuntia upon the Department of Agriculture 
grounds at Chico, California. The species here discussed have 
been under observation a long time. Eight are here described for 
the first time and two are recognized for the first time since 
originally described. 
Opuntia effulgia sp. nov. 
A glistening, dark green, compactly-branched, stocky, turgid 
species of the tree type, with heavy trunk and having a rounded 
bowl, height 1.5-2 m. aah. us now at six years of age, and having 
a spread of branch of about 2 m.; joints subcircular to broadly 
obovate, about 18 x 28 cm. thick, glossy, slightly raised at areoles 
and having a lighter indefinite spot on the tubercle below the 
aes finally becoming smooth surfaced; areoles at first brown 
ith prominent wool, 2-3 mm. in diameter, enlarging in age to 
: mm. or more and becoming gray; spicules scarcely visible except 
on old trunks where they become 2—3 mm. long, in a compact tuft 
in upper part of areole, brown to light brown; spines few, short, 
white or mostly dirty gray, none to 1 or 2, 5-15 mm. long, small, 
straight, stout, flattened and curved on old trunks where they 
become stouter and a little longer, but never numerous; flowers 
yellow, small, 4 cm. in diameter, the petals nearly erect, turning 
Seb ga late in the day, filaments at first greenish, style white, 
but both reddish-tinged in the afternoon; fruit subglobose, mostly 
[The BuLLETIN for May (46: 157-194. pl. 8) was issued May 23, 1919.] 

