SETS eS 
FROM MISSOURI TO SANTA FE AND NORTHERN MEXICO. 45 
plete specimens obtained both by Dr. Wislizenus and Dr. Gregg, I am enabled to correct those 
errors. 1} 
Near Albuquerque a curious Opuntia was observed; it evidently belongs to Opuntia 
cylindracee, but has short clavate joints, which make the name of 0. clavata most [95 (11) ] 
appropriate. A singular plant, with the habit of a Ranunculus, but nearly related 
to Sawrurus, was also found in this neighborhood among grass on the banks of the Rio Grande. 
The genus has been described by Nuttall from specimens collected by him in California, but 
whether his Anemopsis Californica is specifically identical with the New Mexican plant, remains to 
be seen, as this last has regularly 6 leaved involucres, about 6 stamens, and is perfectly glabrous, 
While the last mentioned plants indicate that we approach another botanical region, we are 
surprised to meet here with Polygonum amphibium, common in the Old and in the New World, and 
Cephalanthus occidentalis, so widely diffused in the United States. 
The famous desert, the Jornada del Muerto, furnished, as was to be expected, its quota of 
interesting plants. A Crucifera near Biscutella, of Europe, but with very short styles and white 
flowers, was here met with abundantly. I had considered it as the type of a new genus, when I 
found in Hooker’s London Journal of Botany of February, 1845, Harvey's description of his new 
Californian genus Dithyrea,® which probably must be made to embrace our plant as a second 
species, . 
A new species of Talinum, with single axillary flowers, was found for the first time [96 (12) ] 
in the Jornada, but was again collected further south, towards Chihuahua. Dalea lanata, 
11 Curtopsis, Don, char. emend. Calyx ovatus plus minusve bilobus, lobo altero breviter 3-, altero 2-dentato; 
corolla basi tubulosa curvata, fauce dilatata campanulata, limbo 5-lobo, crispato-crenato; stamina 4 fertilia didynama, 
antherarum nudarum lobis ovatis, obtusis; quintum sterile brevius nudum; ovarium ovatum; stylus filiformis; stigma 
bilamellatum ; capsula siliqueeformis, elongata, bilocularis, septo contrario placentifero ; semina transversa margine 
utroque comosa. 
An erect Mexican shrub, 8 to 12 feet high, ends of branches often slightly twining ; branches smooth, and glu- 
tinous or rarely woolly; lower leaves somewhat opposite, upper ones sparse, lanceolate-linear, long-acuminate, glabrous 
or glutinous; racemes compound, terminal, pubescent; pedicels bracted, corolla rose colored or deeper red or purple. 
Along water-courses or in ravines, from Sabino, near Albuquerque to Chihuahua, Saltillo and Monterey. 
Leaves 2 to 4 inches long, 1 to 3 lines wide; flowers 1} to 1} inch long; fruit 6 to 10 inches long; seeds with the 
coma 6 lines long. - 
There are perhaps two species : one from the neighborhood of Saltillo, with larger, paler flowers, broader, not 
glutinous leaves, and woolly branchlets, perhaps the Ch. saligna Don; the other from New Mexico and Chihuahua, 
with longer, narrower glutinous leaves, perfectly glabrous, glutinous branchlets, and darker and smaller flowers, may 
be Ch. linearis, DC., or a new species, Ch. glutinosa. The calyx is variable in both. 
#2 OPUNTIA CLAVATA, n. sp.: prostrata, ramulis ascendentibus, obovato-clavatis, tuberculatis; areolis orbiculatis 
albo-tomentosis, margine superiore setas albas spinescentes gerentibus; aculeis albis complanatis, radiantibus, 6-12 
minoribus, centralibus 4-7 majoribus, longioribus deflexis; floribus terminalibus; areolis ovarii 30-45 -{50] albo-to- 
mentosis, setas albas 10-15 gerentibus; sepalis interioribus ovato-lanceolatis acuminatis s. cuspidatis; petalis obtusis, 
erosis, sepius mucronatis; stigmatibus 7-10 brevibus erectis ; bacca elongato-clavata, profunde umbilicata, setaceo- 
spin 
osa, 
About Albuquerque (W.), about Santa Fé, on the high plains, never on the mountains (Fendler). Mr. Fendler 
informs me that the ascending joints sprout from or near their base, and that in this manner they finally form a large 
ing mass, often 2 and even 4 feet in diameter, to which the white shining spines give a very pretty appearance. 
Joints or branchlets 1} to 2 inches long, tubercles at their base smaller, with shorter spines, towards the upper and 
thicker end larger, with stouter and longer spines; radial spines 2 to 4, central ones from 4 to 9 or 10 lines long; 
ovary 15 lines long, flower yellow, 2 inches in diameter; stigmas only 14 line long; fruit apparently dry and spiny, 
1} to 12 inch long ; seeds smoother than those of most other Opuntia, rostrate, with a circular embryo. Apparently 
near Opuntia platyacanthe, Salm.; but the tuberculated joints and the shape of the embryo approach it closely to 
O. cylindracee. 
 Dirnyrea, Harv., char. emendat. Sepala 4, basi aequalia, oblongo-linearia. Petala 4 spathulata, basi ampliata. 
Stamina 6 tetradynama, libera, edentula. Stylus brevissimus: stigma incrassatum. Silicula sessilis, biscutata, basi et 
