110 J. N. Rose. 
Sphinctospermum Rose, gen. nov., l. c., p. 107. 
Calyx teeth 5, acuminate, the 2 upper more united than the others; 
petals nearly equal in length; banner nearly orbicular; wings oblong; 
stamens 10, one free to the base, style slender, hairy near the top; 
ovaries sessile, many-ovuled; pods linear, 2-valved, septate between the 
seeds, 6 to 10-seeded; seeds shortly oblong, 4-angled, constricted in 
the middle suggesting miniature vertebrae, dull-colored and minutely 
roughened. 
Annuals with simple linear leaves and single (rarely paired) axillary 
flowers, In its flowers and pods suggesting some species of Cracca 
(Tephrosia), such as C. tenella. Its annual habit, simple leaves, and 
axillary flowers, and ar its most remarkable seeds, exclude it 
positively from. Cracca. 
27. Sphinctospermum constrictum (S. Wats.) Rose, |. c. p. 107, 
pl. XXXIV. 
Syn.: Tephrosia constricta S, Wats. Proc. Am. Acad., XXIV, 46, 1889. 
Reported from western Sonora and Lower California. 
XXXIV. J. N. Rose, Caesalpiniaceae novae mexicanae. 
(Ex: J. N. Rose, Contributions of Mexican and Central American plants, No. 5, 
in Contr. Unit. St. Nat. Herb., X, pt. 3 [1906], pp. 97, 98, pl. XXIX.) 
1. Bauhinia confusa Rose, l. c., p. 97. 
Shrub about 2 meters high; pubescence on young branches short 
and dense; leaves 5 to 6 cm long, either rounded at base or with a 
broad sinus, the terminal lobes about, one-third the length of the blade, 
slightly spreading, acute, slightly hairy above, pubescent on the veins 
beneath; petiole shorter than the blade, pubescent; inflorescence a dense 
raceme becoming 4 to 5 em long; braets long-acuminate; buds elongated, 
with long free tips; calyx spathaceous; corolla white, 15 mm long, 
tapering at base into a slender claw, long-acuminate; perfect stamens 
one, glabrous; ovary on a long slender stipe, pubescent; pods 10 to 
12 cm long, 10 to 12 mm broad, flat, glabrate. 
San Luis Potosi: Tamasopa Cafion, C. G. Pringle, June 25, 1890 
(no. 3104); San Dieguito, Dr. E. Palmer, June, 1904 (no. 126); near 
Tancanhuitz, E. W. Nelson, May 1898 (no. 4363). 
2. Bauhinia goldmani Rose, l. c., p. 97. 
A small tree 6 to 8 meters high; young branches pubescent; 
petioles 6 to 10 mm long; leaves slightly cordate at base, 5 to 7 cm 
long, the lobes one-third the length of the blade, ovate, ascending and 
obtuse, glabrate above, softly pubescent beneath, reticulate; racemes short 
and compact; peduncles 15 to 18 mm long; calyx tips free, filiform; 
petals narrow, glabrous, about 25 mm long, purple; perfect stamen 1; 
