6 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 13, No. 1 
the technical characters of the genus Allionia. It is not closely related to 
any previously known species, its most distinctive character being the 
large perianth. 
Albizzia tomentosa (Micheli) Standl. 
Pithecollobium tomentosum Micheli, Mém. Soc. Phys. Hist. Nat. Genéve 
34: 285. pl. 28. 1903. 
In a recently published part of a volume upon the woody plants of Mexico,” 
some doubt was expressed by the writer as to the proper generic position of 
the tree described by Micheli as Pithecollobium tomentosum. When the manu- 
script for the treatment of the genus was prepared, fruiting material of this 
species was not available. Specimens with both fruit and flowers, collected 
recently in the State of Sinaloa, Mexico, by Mr. Jestis G. Ortega (no. 4554), 
indicate that the proper place of the tree is in the genus Albizzia. The fruit 
is flat, about 11 em. long and 2 em. wide, and has thin, elastically dehiscent 
valves. The vernacular name used in Sinaloa is ‘“‘palo joso.”’ 
Caesalpinia ortegae Standl., sp. nov. 
Branchlets densely covered with stipitate black glands; leaves long- 
petiolate, the petioles and rachis covered with stipitate glands; pinnae usually 
3 pairs, the leaflets 7 or 8 pairs, oblong, 6-11 mm. long, 2.5-4 mm. wide, 
rounded at apex, thinly pilose with short slender stiff whitish subappressed 
hairs, beneath copiously furnished with sessile black glands; racemes elongate, 
densely covered on the rachis, pedicels, and calyx with black stipitate glands 
and also pilosulous with short spreading white hairs, the pedicels 5-10 mm. 
long, articulate below the middle; sepals entire; petals about 1 cm. long; 
fruit elastically dehiscent, flat, densely covered with short-stipitate black 
glands, faleate, about 6 em. long and 1.2 cm. wide; seeds strongly compressed, 
rounded-obovate, 7-8 mm. long. 
Type in the U. 8. National Herbarium, no. 1,083,885, collected in the 
State of Sinaloa, Mexico, by Jestis G. Ortega (no. 890). 
Well distinguished from the related Mexican species by the extraordinary 
abundance of stipitate glands on all parts of the plant. It is a pleasure to 
be able to name so well-marked a species in honor of its collector, who during 
the past few years has made many valuable contributions to the knowledge 
of the Sinaloan flora. 
Amyris conzattii Standl., sp. nov. 
Branchlets slender, grayish, glabrate; leaves alternate, the rachis slender, 
4-7 cm. long, thinly puberulent, the leaflets about 21, rhombic or ovaterhom- 
bic, 6-12 mm. long, 3-8 mm. wide, obtuse or rounded at apex, very oblique 
at base, entire or obscurely crenulate, glabrous or sometimes sparsely puberu- 
lent above, with very numerous large glands; flowers in lax terminal glabrous 
panicles, the fruiting pedicels 5-10 mm. long; drupes globose, 8-10 mm. 
in diameter, the pericarp filled with large and conspicuous oil glands. 
Type in the U. S. National Herbarium, no. 1,110,840, collected at Los 
Sabinos, between Juchatengo and Santa Ana, Oaxaca, Mexico, altitude 
1,000 meters, Dec. 29, 1921, by C. Conzatti (no. 4556). 
2 Contr. U.S. Nat. Herb. 23: 397. 1922. 
