44 BOTANY OF DR. A. WISLIZENUS’S EXPEDITION 
After leaving Santa Fé, Dr. Wislizenus directed his course southward along the Rio Grande. 
The country was partly mountainous and rocky; partly, and principally along the river, sandy ; on 
an average between 4,000 and 5,000 feet above the ocean. Here we find again some of the plants 
of the plains and of Texas, as Polanisia trachysperma, T. and G.; Hoffmanseggia Jamesii, T. and G. 
An interesting Prosopis with screw-shaped legumes nearly allied to P. odorata, Torr. and Frem., of 
California, was the first shrubby mimoseous plant observed during the journey, a tribe which 
hereafter becomes more and more abundant ; Mentzelia sp. Cosmidium gracile, Eustoma, Heliotropium 
currasavicum, Maurandia antirrhiniflora, a beautiful large flowered Datura, Abronia, Hendecandra 
Texensis, and many others. Near Olla the first specimens appeared of a new species of 
Larrea,” the first and most northern form of the shrubby Zygophyllacew, more abundant [94 (10)] 
farther south. In the same neighborhood the mezquite tree or shrub was first met with, 
probably Algarobia glandulosa, T. and G. From here the mezquite was abundantly found down to 
Matamoros, but the specimens collected appear to indicate that there are at least two different 
species. . 
On the next day, near Sabino, an interesting bignoniaceous shrub was collected for the first 
time, undoubtedly the Chilopsis of Don, which farther south appears more abundantly. Its slightly 
twining branches, willow-like slender glutinous leaves, and large paler or darker red flowers, render 
it a very remarkable shrub. Dr. Gregg mentions it under the name of “ Mimbre,’ as one of the 
most beautiful shrubs of northern Mexico. The character given by Don, and that of De Candolle, 
appear defective, though I cannot doubt that both had our plant in view. From the very com- 
floribus lateralibus, tubo pulvillis 15-20 albo-tomentosis setas spinosas apice fuscas 2-5 gerentibus stipato; sepalis 
interioribus sub-12 oblongo-linearibus obtusis ; petalis 12-15 obovatis obtusis; staminibus petala subaquantibus ; 
stigmatibus 8~10 virescentibus, 
On Wolf Creek, in pine woods, flowers in June; Santa Fé (Fendler) 4 to 6 inches high, 2 to 2} in diameter; 
spines in young specimens 4 to 6, in older ones generally 3, two lateral ones 8 to 14 lines long, one bent down only 
6 to 8 lines long. Flowers 2 to 24 inches long, 2 inches in diameter; setose spines of tube 3 to 6 or 7 lines long; 
petals deep crimson, 6 to 7 lines wide; filaments and anthers red. In specimens from Santa Fé, collected by Mr. 
Fendler, the flowers are near 3 inches long, the petals 8 to 9 lines wide, and the setae on the tube are spinous, with 
brownish points. 
EcHINOCEREUS COCCINEUS, n. sp.: globoso ovatus, 9-11 costatus, costis tuberculosis subinterruptis; areolis ovatis 
junioribus albo-tomentosis; aculeis radialibus 9-10 albidis, rectis, oblique porrectis, superioribus brevioribus; centrali- 
bus 1-3 longioribus albidis s, corneis; floribus lateralibus; tubo pulvillis 18-25 albo-tomentosis, setas tenues albidas 
8-11 gerentibus stipato; sepalis interioribus 8-10 oblongo linearibus obtusis; petalis 10-12 obovatis obtusis; stamini- 
bus brevioribus; stigmatibus 6-8 virescentibus. 
With the foregoing, also about Santa Fé. — Only 1} to 2 inches high, 14 to 1} inch in diameter; like most other 
species of this genus, either single or generally branching from the base and cespitose, sometimes forming clusters of 
10 to 15 heads. Spines terete all more or less erect, none appressed as in many other species; radiating ones 3 to 6, 
central ones 8 to 10 lines long. Flowers 14 to 1} inch long, and 1 to 14 wide when fully expanded; bristles of tube 
3 to 6 lines long; petals deep crimson 4 to 5 lines wide; filaments red, anthers red or yellow. The flowers resemble 
ranch those of the last species, but the plant is very different. 
10 LARREA GLUTINOSA, n. sp.: divaricato-ramosissima, ad nodos glutinosa ; foliis breviter petiolatis, bifoliolatis, 
foliolis oblique ovatis mucronatis, nervosis, coriaceis, adpresse pilosis glutinosis; floribus inter folia opposita solitaris; 
ructu 5-cocco villoso. : 
Common from Olla and Fray Cristobal, in New Mexico, to Chihuahua and Saltillo; also about Presidio 
(Dr. Gregg); flowers in March and April; fruit ripe in July. Shrub 5 to 8 feet high, very much branched, very 
glutinous ; used as a sudorifie and diuretic, and called gobernadora, or in the north guamis, according to Dr. Gregg 
Leaflets 3 to 6 lines Jong and half as wide, cuspidate or mucronate; ovary 5-celled, each cell with 3 or 4 ovules ; 
fruit 3 lines in diameter, globose, attenuated at base; seeds by abortion only one in each cell, faleate, smooth, 
shining.* 
* This ‘‘seems to be Larrea Mexicana of Moricand, described and figured in a work to which Dr. E. had not access,” 
according to Dr. Torrey, in a note appended to the paper by Wislizenus. — Eps. 
NTI Ce sera eng rnc 
