354. JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES’ VOL. 13, No. 15 
Avicennia bicolor Standl., sp. nov. 
Tree or shrub, the young branchlets glabrous; petioles very stout, 4 to 15 
mm. long; leaf blades broadly elliptic to elliptic-ovate or oval-ovate 7 to 13 
em. long, 3.5 to 7 em. wide, rounded or obtuse at apex, obtuse at base and 
usually abruptly short-decurrent, glabrous and lustrous above, with promi- 
nent venation, beneath densely covered with a minute whitish tomentum; 
flowers spicate, opposite, the rachis elongate and the pairs of flowers distant 
5 to 8mm. from each other, the spikes numerous, forming lax panicles 5 to 17 
em. long; branches of the panicles minutely tomentose; bracts and bractlets 
rounded, obtuse, tomentulose; corolla 4 mm. long, the tube glabrous, the lobes 
obovate, subtruncate at apex, sericeous outside, glabrous within; style nearly 
obsolete. 
Type in the U. 8S. National Herbarium, no. 715142, collected in mangrove 
swamp at Aguadulee, Province of Coclé, Panama, December 5, 1911, by H. 
Pittier (no. 4968). The following additional specimens have been examined: 
Satvapor: Coast of Departamento de Ahuachapan, Padilla 333. 
PanaMa: Punta Paitilla, Herzberto 206. 
It seems remarkable that a form so distinct as this should not have been 
named long ago, but it may well be that it is of somewhat rare occurrence, 
although the specimens cited indicate that it has a rather wide range. 
Avicennia bicolor is related to the South American A. tomentosa Jacq. (which 
has been reported from various parts of Mexico and Central America, and 
even from Florida, although probably erroneously), but differs in its large, 
broad leaves and, more conspicuously, in the distinct form of the inflorescence. 
In A. tomentosa the flowers are few and the inflorescence is short and congested. 
Dr. Padilla reports that in Salvador this species is known by the vernacular 
name of ‘‘mangle negro.” 
BOTANY.—WNew species of Urticaceae from Colombia.’ EKLLSworTH 
P. Kinurp, U. 8. National Museum. 
While on a recent expedition to Colombia for the U. S. National 
Museum, the Gray Herbarium, the New York Botanical Garden, and 
the Philadelphia Academy of Sciences, Dr. Francis W. Pennell and 
myself gave particular attention to the family Urticaceae, collecting 
about 70 numbers of this group. Most of the species here proposed 
as new are based upon material collected on this expedition, which 
clearly are not referable to any of the species contained in the com- 
prehensive monograph of Urticaceae by Weddell,? or to the com- 
paratively small number described since the publication of that work. 
Several other specimens collected on this expedition probably consti- 
tute new species, but in the absence of authenticated material they 
have not been included in the present paper. 
! Published by permission of the Secretary of the Smithsonian Institution. 
2In DC. Prodr. 16!: 32-235. 1869. 
