E^GELMANN—ADD. TO CACTUS-FLORA OF U. S. 199 
erect pointed cotyledons, and when a few weeks old begins 
to develop its then pubescent spines. 
Var. p. with smaller tubercles in - 2 8 T or LJ, or even %\ order, 
closely set, bearing smaller but often more numerous spines, 
(20-28 ext., 6-7 int.,) may be confounded with the simple 
mountain form of Mam. vivipara, from which, w T hen not in 
flower or fruit, only a close examination can distinguish it. 
8. Echinocactus pubispinus, spec, nov.: parvus turbina- 
tus; costis 13 subobliquis compressis interrupts; areolis 
orbiculatis; aculeis, breviusculis velutinis demum nudatis 
albidis apice adustis, radialibus inferioribus lateralibusque 
5-8 brevioribus, superioribus 1-2 robustioribus rectis curva- 
tis seu hamatis, central! deficiente seu singulo robustiore 
longiore arrecto sursum harnato. 
Pleasant Yalley, near Salt Lake Desert, found in May 
without flower or fruit, but exhibiting in the vestiges of the 
small supraspiral floriferous areolae the character of the genus. 
Perhaps the smallest species of the genus, 2 iflches high, 1-1 \ 
in diameter; ribs formed by compressed confluent tubercles; 
areolae 4-6 lines apart'; radial spines 1-4 1. long, more 
densely pubescent, or even tomentose, than I have seen them 
in any other Cactus ; on the lower areolae 5 or 6, on the upper 
ones 9-12; here and there a single central spine makes its 
appearance, 5-6 1. long, stouter, and always strongly.hooked. 
4. Echinocactus Whipplei, Engelm. & Bigelow , Cact. 
Whipp.p. 28, 1 .1 / Syn. Cact.,p. 15 ; Ives ’ Exped. Bot.,p. 12. 
Var. spinosior: acuieis radialibus 9—11, inferioribus saepe 
obscurioribus, reliquis longioribus niveis, summis 2 saepe elon- 
gatis latioribus curvatis; centralibus 4, summo longo piano 
flexuoso, caeteris paulo brevioribus obscuris, solo infimo seu 
omnibus hamatis. 
Desert Yalley, west of Camp Floyd, Utah, with the rem¬ 
nants of flowers and fruit, and with seeds hid between the 
spines, exactly like the seeds figured in the plate cited above ; 
embryo curved about around a large albumen ; stigmas 6-7. 
The locality is about 5 degrees north of the place where Dr. 
Bigelow, and afterwards Dr. Newberry, found the plant. 
5. Cereus viridielorus, Eng elm. ; evidently the most 
northern Cereus, found as far north as the Laramie region, 
and not rare in Colorado, where it occurs 1-3 inches high, 
mostly with 13 ribs, and with the greatest variability in the 
color of the radial spines, and in the presence of the 1-2 cen¬ 
tral ones. 
6. Cereus Engelmanni, Parry : in the Salt Lake Desert, 
far to the northwest of the country where it w r as originally 
discovered; always characterized by the cruciate central 
spines. 
7. Opuntia sphaerocarpa, Eng. & Big. var.? Utahen- 
sis : diffusa; articulis orbiculato-obovatis crassis, junioribus 
