CACTACEZ OF THE BOUNDARY. 189 
distantibus ; sepalis inferioribus 20-30 cordato-auriculatis, superioribus 15-20 lanceolatis basi auriculatis margine 
membranaceis ; petalis 20-25 lanceolatis sulphureis ; stylo longe supra stamina exserto ; stigmatibus 8-12 apiculatis 
erecto-patulis ; bacca ovata squamis 7-10 munita viridi ; seminibus obovatis seu lenticularibus hilo oblongo sub- 
basilari excisis lucidis sub lente minutissime punctatis. (Tab. LX XIV. fig. 11-14 
ecos, San Pedro, and Rio Grande rivers; Wright, Schott. —I have above given a careful description. of 
this plant, because it is so nearly allied to the foregoing and especially to the next species, which Dr. Poselger thinks 
it connects. With the former it has in common only the compressed ribs and the setaceous radial spines, but is dis- 
tinguished by its size, the central spines, the fruit, and especially the seed. From the next species, which it much 
more closely resembles, it is distinguished by the compressed ribs, the slender radial spines, the smaller number of all 
arts of the flower, the small fait = the smaller very finely punctate seed. My specimens are 4 or 5 inches in 
diameter, while Dr, Poselger’s were 8 inches thick. Areole 8-10 lines apart ; itt spines smooth, purplish-brown, 
lighter at top, #-1 inch ioag: lateral ses puberulent, straw-colored, 1-1} inch long; central spines puberulent, 
3 upper ones yellowish, generally darker at base, 13-2 inches La ; lower central spine much stouter 
and longer than all the others, and flattened or even channelled, pale-yellowish, often purplish at base, flexuous, [22] 
more or less hooked, sometimes straight, 2—4 inches long. owers 2-3 inches long, yellow, apparently without 
the scarlet base of the petals, which I always find i in both the allied species externally greenish. Fruit oval, 8-9 lines 
long, with 7-12 nenee: ; green when ripe. Seeds 0.4-0.6 line long. Dr. Poselger describes another form under the 
name of £. setispinus 5. robustus, which is said to have all 4 dtntcal: and often the 3 lower radial spines also, more or 
less hooked. The oa which he has sent to me leaves no doubt in my mind that it is a form of EZ. sinuatus. In my 
specimens only the lateral spines sometimes are flexuous, or hooked, or almost curled. 
ONGEHAMATUS, Galeotti: subglobosus seu demum ovatus, lete-viridis ; costis 13-17 sepe obliquis 
tuberculatornterruptis latioribus obtusis ; tuberculis ovatis supra brevissime sulcatis ; areolis ovatis seu suborbiculatis 
distantibus ; aculeis junioribus plerisque purpureis, adultis demum totis cinereis ; radialibus 8-12 rectis curvatis 
flexuosisve ii superioribus gracilioribus pallidioribus, infinmio brevi, lateralibus longioribus subannulatis ; aculeis 
centralibus 4 (1-4 superioribus ee subinde adjectis) angulatis compressis —- quorum superiores recti 
seu curvati seu contorti sursum versi, infiraus robustior plerumque longissimus spe flexuosus plus minus uncinatus 
porrectus vel deflexus ; floribus ab etre culeifera vix sejunctis infundibuliformibus, Timbo patulo ; ovario 
sepalis scarioso- saigiratls ciliatis, inferioribus 30-60 squamiformibus reniformibus, wen 10-20 obovato-spathulatis, 
superioribus 15-20 demum oblongo-obovatis obtusis cuspidatis ; petalis 20-30 Secreta obtusis vel retusis denticu- 
latis cuspidatis seu mucronatis sulphureis ima basi coccineis et sepius dorso rubellis ; stigmatibus 15-18 obtusis 
sulphureis patulis ; bacca ovata squamosa viridi ; seminibus globoso-obovatis ‘bilo ovato subbasilari oblique excisis 
scrobiculatis lucidis. (Tab. XX ¥.) 
. @ CRASSISPINUS. LE. flexispinus, E. in Wisliz. Rep. non Salm.: aculeis robustissimis, radialibus 8-11, 
sguaceaiy 4 pi aes infimo flexuoso plus minus hamato. 
LIsPINuS: aculeis gracilioribus 16-20, exterioribus 12-14, centralibus 4-8, infimo elongato hamato. 
E. en “Mashlen of, 
Var. y. BREVISPINUS : aculeis gracilioribus, radialibus 8-11, centralibus 4 teretibus cum infimo hamato radiales 
vix superantibus, 
Along the middle course of the Rio Grande and near the Pecos and San Pedro rivers, on _ mountains of the 
Limpia, and near Presidio del Norte, and southward into Mexico, but not as far west as El Paso; Wright, Bigelow. 
Flowers June and July. — Heads } to 2 feet high, but flowering often when not more than 2 Rae high 5 ribs. usually 
13; areole roundish in younger, more elongated in older della often only 6-10 lines, but in vigorous plants 
1-1} inch apart. Spines glabrous, or only the lower central one scabrous peru lateral spines whitish ; all the 
others purplish or variegated, with paler semitransparent tips. The forms 8. and y. are those which occur in our terri- 
tory ; they differ in the length and number of spines, but not at all in flower and fruit. In var. 8 the lower and 
upper radial spines are 1-3 inches, the lateral ones 2-3} inc hes long; upper central spines 2-5, and lower one 
3-6} inches long. Var. y. is perhaps the young plant, as these feb otin flower when yet quite young, and before 
the character of the mature plant is yet fully developed. This in a very mar arked degree is the case with EZ. wncinatus, 
var., which begins to bloom while the central spine is yet “dite short and terete. Lower radial spines in var. y 
i inch, upper ones 1}-2 inches long ; lateral ones 13-1} inch, and central spines all 13-2 inches long. sais 
form a groove just above the spines, separated from the Got foros areola by 2-5 obtuse cylindric glandul: 
bodies, which when young exude a clear viscous liquid. I find them also in £. setispinus, E. Emory, and [23] 
numerous others, and they correspond, no doubt, with the glands in the groove of Mamillaria Scheerti and 
others. They appear with the flower, and are soft and fleshy at that time ; afterward they become hardened, of the 
texture of the spines themselves, and are persistent. Flowers 2}-3} inches long, externally greenish-yellow and red, 
internally yellow, with a red base. Fruit 1-2 inches long, coated with 25 or 40 or more scales, crowded with the 
