182 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
DOUBTFUL SPECIES. 
ERYTHRINA DIVARICATA DC, Prodr. 2: 414. 1825. 
Based upon one of Sessé and Mocifio’s plates,’ and said to be a Mexican plant. 
The standard, as illustrated, is very broad, and the plate does not agree with 
any material seen by the writer. 
ERYTHRINA LONGIPES DC. Prodr. 2: 418. 1825. 
This, too, was based upon one of Sessé and Mociiio’s plates.” The copy of 
the plate seen by the writer is poorly drawn, and it is impossible to place the 
plant with certainty. 
EXRYTHRINA PRINCEPS Dietr. in Otto & Dietr. Allg. Gartenz. 2: 305, 1834. 
Described from Mexico. Not identifiable from the description. 
ERYTHRINA ROSEA Dietr. in Otto & Dietr, Allg. Gartenz. 2: 253. 1834. 
Described from Mexico. Identity doubtful. 
FOUR NEW SPECIES OF CAPPARIDACEAE FROM MEXICO AND 
CENTRAL AMERICA. 
The family Capparidacese is extensively represented in Mexico by 
both herbaceous and arborescent species. One of the most interesting 
of these is a new genus described a few years ago by Brandegee ® 
under the name Setchellanthus. The most noteworthy of those here 
described are the two species of Forchammeria, a very abnormal 
genus, concerning whose systematic position there has been great 
difference of opinion. Forchammeria is confined to Mexico, and only 
three older species are known. 
Capparis discolor Standl., sp. nov. 
Tree, 8 to 10 meters high, glabrous throughout, the branchlets slender, black- 
ish brown; petioles slender, 2 to 7.38 cm. long; leaf blades elliptic-oblong, 10.5 to 
15 cm. long, 3 to 6 cm. wide, narrowed to the obtuse base, acutely acuminate at 
the apex, broadest at the middle, bright green above, sublustrous, the venation 
prominent, closely reticulate, pale and brownish beneath, the costa and lateral 
nerves salient; flowers few, white, in a terminal raceme, the pedicels 3.5 to 
4.3 cm. long; calyx lobes deltoid, subacute, 2 mm. long, reflexed in anthesis; 
petals elliptic-oblong, 12 to 15 mm. long, obtuse; stamens numerous (about 40), 
the filaments 3 to 4.5 cm. long, tortuous or spirally coiled, glabrous, the anthers 
about 2 mm. long; ovary ellipsoid, the stipe about as long as the filaments. 
Type in the U. S. National Herbarium, no. 385447, collected on the banks of 
the Rio Petatlin, Guerrero, Mexico, altitude 450 meters, November 24, 1898, by 
KE. Langlassé (no. 558). 
A species of the section Capparidastrum. It differs from the previously de- 
scribed Mexican and Central American species of that group in the very long 
petioles, those of the other species being only 1 cm. long or often much shorter. 
C. macrophylla H. B. K., of Colombia, also has long petioles, but the leaf blades 
are much larger and proportionally broader. 
*Calq. Dess. Fl. Mex. pl. 256. 
* Calg. Dess. Fl, Mex. pl. 254. 
* Univ. Calif, Publ. Bot. 3: 878. 1909. 
