mostly 6 lines, lower ones 6-10 lines, upper ones 8 -15 lines long; 
central spine, if present, 12- 15 lines long. 
§ 3. Pentalophi. 
23. C. Berlandieri, E. in B. C. R.: humilis, perviridis ; caule dif- 
fuso subtereti articulato ramosissimo ; tuberculis conicis 5 — 6-fariis ; 
aculeis 6-8 setaceis brevibus radiantibus albidis, centrali singulo 
multo longiore fusco ; floribus magnis; petalis angustis recurvatis; 
seminibus tuberculatis. 
On the Nueces, in Southern Texas: fl. May and June. — Stems 
- 6 inches long, one inch thick; radial spines 4^- 5 lines long, cen¬ 
tral one 6—12 lines long, toward the base of the branches shorter. 
Flower 2-4 inches long. 
24. C. procumbens, E. in PL Lindh. 1850: humilis, perviridis; 
caule diffuso subtereti 4-5 angulato articulato ramosissimo; aculeis 
4-6 radiantibus albidis, centrali nullo vel singulo paullo longiore ob- 
scuro ; floribus magnis; petalis obovato-spathulatis patulis seu sub- 
recurvis ; seminibus tenuissime verrucosis. 
On the Rio Grande, below Matamoras : fl. May and June. ■_ 
Similar to the last; but more slender, 6-8 lines in diameter ; radial 
spines 1-2 lines long, central one, if present, 2-3 lines long. Flower 
above 3 inches long. 
jv~ <3 
§ 4. Graciles. 
25. C. TUBERosus, Poselger: e radice tuberosa tenuissimus, teres, 
sursum incrassatus, demum articulatus, 8-cdstatus; aculeis minutis 
setaceis, 9—12 radiantibus, centrali singulo longiore sursum adpresso ; 
flore subterminali; seminibus minutis scrobiculatis. 
Between Laredo and Mier on the Rio Grande. , Tuberous root £- 
11 inches thick. Stem above 4,-8 lines thick; radial spines hardly 
1 line, central ones 2-3 lines long. Seed smaller than in any other 
Echinocereus , 0.4 line long, with the tubercles confluent. 
Subgen. 2. Eucereus. Caulis elongatus : fasciculi aculeorum ste- 
riles et florigeri similes: floris tubus elongatus, ssepissime aculeolis 
capillaceis munitus: stigmata pallida: semina l^evia seu raro ru- 
gosa: embryo hamatus. 
26. C. Emoryi, E. in Sill. Journ. 1852 : prostratus; ramis adscen- 
dentibus 15-costatis; areolis confertis; aculeis setaceis rigidis flavis, 
mmm 
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L_EHHHi 
0 1 J 
4 5 ( 
5 7 
’ 8 £ 
) 10 
Missouri 
cm 
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