CACTACER. B5 
bluish-green in Parry’s specimens, with 25-30, in Schott’s with 35-40 scales; seed 0.8 lines 
long, very minutely but distinctly pitted. 
11. E. cyzrypracevs, E. in Sillim. Journ., 1852, sub EZ. viridescente: ovatus seu ovato-cylin- 
dricus, simplex seu plerumque e basi ramosus ; vertice breviter tomentello costis 21 seu pluri- 
bus rectis seu obliquis obtuse tuberculatis ; areolis ovatis ; aculeis robustis compressis annulatis 
plus minus curvatis flexuosisve rubellis apice corneis, radialibus 12 seepe cum aculeis graciliori- 
bus sub-5 summe areole insertis, lateralibus tenuioribus, infimo robusto breviori decurvato- 
hamato ; aculeis centralibus 4 robustissimis 4~angulatis compressis cruciatis, superiore latiore 
sursum suberecto, inferiore deorsum curvato; flore flavo; bacca subglobosa carnosa pallide 
virescente sepalis semilunatis fimbriatis stipata, floris rudimentis coronata. (Tab. XXX.) 
Rocky ravines near San Felipe, on the eastern slope of the California hmountains, in latitude 
33°, Dr. Parry ; also seen by Dr. Le Conte. Young plants globose, older ones ovate and cylin- 
dric ; the former have 13 ribs, the latter from 20 to 27 ; the largest specimens seen were 3 feet 
high and a foot in diameter. They often branch out at base, which by Dr. Parry is ascribed to 
the action of fire, crippling the original stem. Ribs somewhat interruptedly tuberculated ; 
tubercles flattened horizontally. In the youngest specimens are found already 7 radial and 4 » 
central spines, the lower radial spine much the stoutest and quite curved, the 3 upper central 
spines almost radiating, the lower one erect, all stout, and 1-14 inch long. In older speci- 
mens (the one before me is globose, 4 inches in diameter, with 13 ribs) the areolw are 6-8 
lines long, 34-4 lines wide ; the radial spines (together with the 3-5 slender additional ones 
on the upper edge of the areola) 12-18; the lowest one is stout and much hooked, and the 
shortest of all; the others are from 1}~2 inches long; the 4 central spines are 1-1} line 
broad, and about 2 inches long; in the most fully developed bunches of spines the 3 upper 
radial spines are pushed into the inner circle, so that then the number of centrals appear to be 
7. The upper central spine is the broadest one, almost straight and erect ; the lower one 
has mostly a strong downward curve. The fruit is described by Dr. Parry as a green, juicy 
berry, about an inch indiameter, in the axils of the uppermost spines, with yellow remains of 
the corolla; seed black, ‘‘ intermediate in size between that of E. viridescens and E. Wislizeni.’’ 
I was inclined to consider this plant as a form of Z. viridescens, but Dr. Parry, who has seen 
numerous specimens of it, is satisfied that it is quite a distinct species. It is characterized by 
the cylindrical growth, more obtuse ribs, more numerous, longer, and more curved spines, of 
which the upper, not the lower one, is the largest and broadest. It is quite remarkable that 
we have three So similar species on both sides of the Californian mountains as the two just 
mentioned and £. polycephalus ; the western one globose, the two eastern ones cylindrical and 
many-headed ; these entirely dissimilar in flower and fruit, and one of the eastern and the 
western one so much alike. It is an interesting observation that similar but quite distinct 
species occur on both sides of the mountains, not only in this genus, but also in Mamillaria 
and Opuntia ; and that no species crosses that mountain range. 
12. E. potycepnatus, Engelm. and Bigelow, in Pacific Railroad Report, found by Mr. Schott 
on the Gila and lower Colorado. He notes the cespitose growth, and the heads 5-8 inches in dia- 
meter, 10-15 inches long, with 10-15 ribs. Dr. Bigelow’s specimens from the Mojave river were 
much larger, but the fruit sent by Mr. Schott leaves no doubt about their identity, 
13. E. Parryi (sp. nov.): simplex, globosus seu depressus; costis 13 acutis tuberculato-inter- 
ruptis, seepe obliquis; areolis orbiculatis, seu ar orifera contigua mi ddita, ovatis albo- 
we 
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