252 FIELD COLUMBIAN MUSEUM BOTANY, VOL. II. 



collected at Cordoba by Dr. Asa Gray and referred by him to the 

 above species, although no published record of them has been 

 found by the writer, bear somewhat larger fruit than my num- 

 ber 124, but differ in no other apparent regard. 



Caesalpinia yucatanensis Greenman, sp. nov. 



Shrub or small tree: stem covered with a light gray bark, 

 dotted with numerous lenticels, glabrous; cortex defoliating 

 in thin scarious layers; ultimate branchlets puberulent; leaves 

 alternate, bipinnate, petiolate, unarmed; petioles 2 to 6 cm. 

 long; pinnae 2 to 3 pairs; leaflets 2 to 4 pairs, oblong-elliptic, 

 1.5 to 4 cm. long, 0.7 to 2.5 cm. broad, obtuse to rounded at 

 both ends or slightly retuse at the apex, entire, glabrous on both 

 surfaces or somewhat pubescent in the early stages and glabrate; 

 midrib slightly sunken from the upper surface and, as well as the 

 lateral nerves, somewhat prominent beneath; petiolules i to 1.5 

 mm. long: inflorescence usually in terminal panicles, 0.5 to 1.5 

 dm. in length, occasionally terminating the lateral branches 

 in simple racemes, finely pubescent; pedicels i to 2 cm. long, 

 jointed above the middle, pubescent: calyx about i cm. long, 

 5 -parted; segments oblong-rotund, imbricated, densely soft- 

 pubescent on the outer surface: petals oblong to oblong-obovate, 

 about 1.5 cm. long, 8 to 10 mm. broad, narrowed at the base into 

 a villous-pubescent claw, chocolate-brown or dark red in color 

 and margined with pale yellow, covered externally in the lower 

 half with sessile or short-stipitate glands; the uppermost petal 

 producing a short fold on the inside near the base: stamens 

 barely exserted; filaments pubescent with more or less matted 

 hairs: ovary and lower part of the style densely pubescent: 

 mature fruit sessile, oblong, slightly oblique, 6 to 12 cm. long, 

 2 to 2.5 cm. broad, short-pubescent and closely beset with stipi- 

 tate tack-shaped glands; seeds suborbicular, flat, about i cm. 

 in diameter, smooth. Caesalpinia exostemma Millsp. Field 

 Col. Mus. Bot. Ser. i. 21 (1895), not Moc. & Sesse ex DC. 

 MEXICO. State of Yucatan: vicinity of Izamal, collection of 

 1895, Dr. Geo. F. Gaunter, no. 371 (hb. Field Mus.), type; near 

 Izamal, 13 January, 1895, Dr. C. F. Millspaugh, no. 75 (hb. Field 

 Mus.); Izamal, 22 February, 1906, /. M. Greenman, no. 417 

 (hb. Field Mus.); San Anselmo, Dr. Geo. F. Gaumer, no. 1715 

 (hb. Field Mus.); near Merida, Dr. A. Schott, without number 

 (hb. Field Mus.) ; on old hennequin plantations near Merida, 

 February, 1903, C. & E. Seler, no. 3844 (hb. Field Mus.) ; Colonia 

 San Cosme, 20 February, 1906, /. M. Greenman, no. 349 (hb. 

 Field Mus.); Itzimna, 19 February, 1906, /. M. Greenman, no. 

 335 (hb. Field Mus.); near Progresso, 5 March, 1899, Dr. C. F. 

 Millspaugh, no. 1660 (hb. Field Mus.); without definite locality, 

 coll. of 1896, Sr. Porfirio Valdez, no. 7 in part (hb. Field Mus.). 

 State of Campeche: without locality, Dr. Henry Perrine (hb. 

 Gray, and hb. Torrey). 



This species is related to C. exostemma Moc. & Sesse ex DC. 



