204 Plante Lindheimeriane. 
albo-tomentosis; aculeis brevibus tenuibus albidis apice fus- 
cis, 5—6 radiantibus, centrali singulo erecto paulo longiore ; 
floribus diurnis ; ovario tuboque brevi pulvillis sub-40 albido- 
villosis setas spinescentes breviores fuscas 6—9 gerentibus 
stipato; sepalis interioribus sub-15 lineari-lanceolatis acumina- 
tis ; petalis 18—20 oblongo-linearibus acutis mucronatis sub- 
integris (violaceis) ; stigmate viridi infundibuliformi 10-par- 
tito stamina (pallide ~flavicantia) paulo superante.—On the 
lower Rio Grande, below Matamoras, collected by the St. Louis 
Volunteers, in 1846.— Plant spreading, 3—5 inches high: 
joints or branches 13-2 inches long, } inch in diameter, much 
contracted at the base: tubercles 4 or 5 lines distant from one 
another, often in 4 rows, whence the plant derives a distinctly 
quadrangular appearance, or in 5, when it is more cylindrical. 
Radial spines 6, or mostly only 5, the uppermost being fre- 
quently abortive, 1—1} lines long; central spine 1}-2, lines 
as long, stouter, directed upwards. Flower 3 inches long, and 
as wide when fully expanded, of a delicate purple color: petals 
4 lines wide, often, in a bright noonday sunshine, recurved. 
Bristles on the tube about twice as long as the wool, below 
1:—2, above 24-3, lines long. — We have in gardens in St. 
Louis a similar species in cultivation, under the name of C. 
Deppit ; but, as Prince Salm informs me, widely different from 
the true C. Deppii. It is not known whence it was obtained. 
It is distinguished from C. procumbens by the larger, thicker, 
more cylindric limbs: tubercles elevated, very distinct, in 5 or 
6 rows ; spines weaker and longer; 6—8 radial spines 5-6 
lines long; ventral spine from 5 to 14 lines long: flower with 
a shorter tube, fewer pulvilli, with shorter wool, but longer 
and weaker bristles. . . 
Cereus Remert (n. sp.): ovatus, e basi ramosus; costis 
sub-8 (7-9) tuberculatis interruptis; areolis orbiculatis, 
junioribus breviter tomentosis; aculeis albidis s. flavidulis 
demum cinereis teretibus, radialibus sub-8, centrali singulo 
robustiori porrecto; floribus diu noctuque apertis infundi- 
buliformibus, limbo erectiusculo; sepalis ovarii et tubi 17 
