JAN. 4, 1923 STANDLEY: NEW SPECIES OF PLANTS 5 
BOTANY.—New species of plants from western Mexico. Pauu C. 
Sranp.LEyY, U. S. National Museum.! 
Among the numerous collections of Mexican plants in the U. 8. 
National Herbarium there are probably none of greater value and 
few equal in importance to those obtained by Prof. C. Conzatti during 
his many years of residence in the State of Oaxaca. At frequent 
intervals he has generously presented to the National Museum sets of 
specimens of his collections, mostly secured in Oaxaca, until now these 
amount to over four thousand sheets, which possess an added value 
because of the care with which they have been prepared. Almost 
every sending from Professor Conzatti includes at least a few un- 
described plants, and always there are representatives of many rare 
and imperfectly known species. The list of distinct new plants dis- 
covered in Professor Conzatti’s collections is already a long one, and 
there doubtless remain many morein the herbarium under groups which 
have not been studied critically. 
Five of the species here proposed as new were contained in a small 
shipment of plants received last summer. ‘This sending also included 
an exceptionally large number of rare species, many of which were 
known previously from a single collection. Several others of the 
plants probably represent new species, but they belong to groups 
in which it does not appear desirable to describe further novelties 
until critical revision can be undertaken. There is published here 
also a description of a new species of Caesalpinia from Sinaloa, and 
a tree previously described as a Pithecollobium is transferred to a more 
natural position in the genus Albizzia. 
Aljlionia grandiflora Standl., sp. nov. 
Stems slender, branched, densely short-pilose throughout, the pubescence 
viscid above; petioles slender, 5-12 mm. long, short-pilose, the blades ovate 
to broadly ovate, 3-5 cm. long, 2-3 cm. wide, acuminate, rounded or obtuse 
at base, thin, densely short-villous on both surfaces; involucres mostly in 
terminal one-sided cymes, short-pedunculate, 1-flowered, about 1 cm. long, 
densely villous, the lobes lanceolate, acuminate; perianth magenta, 2.5-3 cm. 
long, densely pilose below, glabrate above, the tube 1.5-2 em. long and 3 mm. 
thick; stamens included; fruit (immature) 7 mm. long, constricted near the 
base, minutely puberulent, the 5 ribs broad and nearly smooth. 
Type in the U. 8. National Herbarium, no. 1,110,839, collected on the 
Cerro Jucusd, Tututepec, Oaxaca, Mexico, altitude 240 meters, Dec. 13, 1921, 
by C. Conzatti (no. 4449). 
In general appearance this plant resembles a Mirabilis, but it possesses 
1 Published by permission of the Secretary of the Smithsonian Institution, Received 
December 1, 1922. 
