168 CACTACEX OF WHIPPLE’S EXPEDITION. 
Sent from the Yellowstone by Dr. Hayden. A stout form. Joints 3 inches long, 23-2? wide; pulvilli 4-6 lines 
apart ; the dirty yellowish bristles visible only on the older joints. Central —_ single, or only on vigorous speci- 
mens on the upper pulvilli 2, mostly brownish, deeper colored on the margin. uit 8-9 lines long, umbilicus of the 
same diameter; spines only 1-3 lines long, deflexed. Seed 3 lines in es rim i ane narrower than in the 
first-mentioned form 
y. MICROSPERMA : articulis ut in precedente; stigmatibus 5; bacca ovata, umbilico parum depresso, pulvillis, 
20-30 setosis et breviter aculeolatis, seminibus anguste acuteque marginatis. (Plate XIV. figs. 5-7. 
n the Missouri, about Fort eagle Digits ce down ten years ago by the fur traders. Very similar to the last 
form in the general appearance. Also with only 1, or at most 2, central dark spines ; flowers only with 5 stigmata, 
otherwise same as the one described aed fruit short, oval, with 10-20 very short spines on the numerous pulvilli ; 
seed only 2 lines in diameter, more regular, thicker in proportion, with a narrow and acute rim. It might be 
supposed that these characters were important and constant enough for a specific difference, if we did not know 
the great variability in this genus, and if we did not find among Dr. Hayden’s plants seeds of intermediate shape 
and size. 
8. SUBINERMIS: articulis elongato-obovatis, pulvillis subremotis, inferioribus, inermibus, superioribus aculeos 
paucos breves gerentibus 
ght from the upper Missouri by Dr. Hayden ; remains constant in three years’ cultivation. Joints 
33-5 inches long, half as wide, gradually narrowed down at base ; leaves entirely similar to those of the common form; 
pulvilli 6-9 lines apart ; spines entirely wanting, or on the upper pulvilli 2 or 3 short and slender ones, rarely one or 
the others more robust, }-4 inch long. Flowers not seen. 
€. ALBISPINA : articulis late obovatis, setis stramineis, aculeis omnibus albis gracilioribus, exterioribus 6-10 seta- 
ceis, interioribus in Se superioribus 1-3 robustioribus elongatis deflexis s. patulis ; bacca ovata, seminibus magnis. 
(Plate XIV. figs. 8- 
Sandy bottoms er dry beds of streamlets on the upper Canadian, 250 miles east of the Pecos; on the Sandia 
mountains near Albuquerque; also on the upper Missouri. This was the first form of this species met with in travel- 
ling up the Canadian ; the stouter and more compact forms were found farther west, in higher elevations, Joints 
3-4 inches long, 23-3 wide: ; pulvilli 4-6 lines apart; spines all ivory white, rarely with a yellowish tinge, larger ones 
1-1} inch long; fruit with very shallow umbilicus, and very slender and short spines ; seed 3-33 lines in diameter, 
irregular, rim broad acutish. A form from the Sandia mountains — with pulvilli more remote, spines longer, more 
slender, some of them = ae ene to unite this with the next variety. 
¢. TRICHOPHORA : articulis ovatis, pulvillis confertis parce albo-tomentosis setas stramineis demum albidas 
breves gerentibus, omnibus armatis ; aculeis 10-18 setiformibus albis, exterioribus 8-12 brevioribus radiantibus, 
interioribus longioribus deflexis, rarius singulo suberecto; pulvillis in articulis vetustioribus lignosis confertissimis 
setas numerosas aculeosque 15-25 capillaceos elongatos flexuosos gerentibus; bacca ovata, umbilico parum immerso 
pulvillis 35-40 albo-tomentosis stramineo-setosis fasciculum aculeolorum 2 18 plerumque deflexorum gerentibus ; 
seminibus maximis valde compressis irregularibus latissime acuteque marginatis. (Plate XV. figs. 1-4 
Only on the volcanic rocks about Santa Fé, and on the Sandia mountains. The hoar  aapeameihe of the older 
joints is very characteristic, and reminds one strongly of Pilocereus senilis. These hairs are Be a few lines to 
2 or 2} inches in length, wad of the appearance and about as fine as an old man’s beard. The older 2 [47] 
become thick and of a solid ligneous substance, hap joints 44 inches a , 24 inches wide, or larger; p 
villi 4-5 lines apart ; exterior spines 3-6 lines, interior ones 9-18 lines long. Fruit ovate, 10 lines long, 7 in Aiaseots ; 
very slender and numerous spines, 3-6 lines long. Seeds, with those of 0. hystricina, the largest known to us, 3} lines 
in diameter, sometimes larger ; rim large, almost of the thickness of the seed itself. This is perhaps a distinct species, 
and must be further studied. 
14. O. SPHHROCARPA, iP. nov.: diffusa, articulis orbiculatis transversisve tuberculatis ; pulvillis confertis 
albo-tomentosis, setas stramin ot Deeves <oiaaetee plerisque inermibus, su marginalibus aculeos 
1-2 reflexos s. patulos, aca subinde 1-3 brevioribus a Si fiadea globosa, umbilico minore plano, pulvillis 
sub-25 tomentosis setosis vix aculeolatis, ailatiiee mediis acute marginatis. (Plate XIII. figs. 6-7. 
the eastern declivity of the Sandia mountains, near AToaneeraie: Joints in the specimen before us 3 inches 
wide, less in length, strongly tuberculated ; pulvilli 4-5 lines apart. Spines on the upper lateral pulvilli mostly 
single, deflexed, $ inch long; on the middle or lower ones none; on the uppermost and marginal ones mostly 2, 
rarely 3 lines long, reddish brown, with darker tip; 1-3 smaller additional spines, 2-4 lines long, also reddish. 
Fruit perfectly globose, 9 lines in diameter ; umbilicus 5-6 lines wide ; pulvilli bristly, but only the ee ones with 
1 or a few small spines. Seeds 2} lines in diameter, very irregular, with a rather narrow but sharp ri 
The arrangement of the spines is so different from any form of 0. Missouriensis —w va gente shows the 
