98 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Type in the U. 8. National Herbarium, no. 48566, collected in Nicaragua by Charles 
Wright. 
This, like Iresine costaricensis, is related to I. argentata. It differs from the latter, 
however, in having thin rather than subcoriaceous leaf blades, which are acute at the 
base and broadest above the middle, rather than rounded at the base and broadest at 
or below the middle. 
NEW OR NOTABLE ALLIONIACEAE. 
In the course of preparing a monograph of the North American 
representatives of the genus Torrubia two undescribed species have 
been discovered—one from Mexico and one from Guadeloupe. This 
group has usually been referred to Pisonia, but several years ago 
Dr. N. L. Britton showed ' the inconsistency of retaining it in that 
genus, and transferred to it all the West Indian species then known. 
A number of West Indian species of Pisonia have since been described 
which are properly referable to Torrubia and are here transferred to 
that genus. At the same time it seems desirable to make the proper 
nomenclatorial combinations for the South American species of Tor- 
rubia. There is appended also a description of a new Panamanian 
species of the closely related genus Neca. 
Several years ago the writer proposed the name Commicarpus ? for 
that section of the genus Boerhaavia having glanduliferous fruits 
borne in umbels or verticels. The genus is well marked, besides, by 
the scandent habit of the plants. At the time the new genus was 
proposed only the Mexican species were transferred to it. Most of 
the other species are African. The writer takes this opportunity of 
transferring them, also, to Commicarpus. 
Two South American Allioniaceae, also, described as species of 
Mirabilis, are here transferred to Allionia. 
Neea delicatula Standley, sp. nov. 
Branches slender, greenish gray, glabrous, the branchlets slender, ferrugino-puber- 
ulent when young but soon glabrate, the internodes short; petioles slender, 4 to 7 
mm. long; leaves alternate, the blades elliptic, elliptic-obovate, or oblong-oval, 2.2 
to 6 cm. long, 9 to 20 mm. wide, cuneate to acutish at the base, abruptly acuminate 
at the apex, the tip narrowly triangular, acutish or usually obtuse, the blades thin, 
deep green, concolorous, glabrous and dull on the upper surface, sparsely rufo-puberu- 
lent beneath along the midvein, the margins plane, the lateral veins obsolete or nearly 
so; peduncles of the staminate cymes 2.2 to 4.5 cm. long, terminal and axillary, nearly 
filiform, flexuous, glabrous, the cymes few or many-flowered, 2 to 5 cm. wide, the 
flowers on slender pedicels 4 to 15 mm. long; bractlets triangular-oblong, acute, 1 mm. 
long, puberulent; staminate perianth urceolate, acutish at the base, 4.5 mm. long, 
3mm. wide, puberulent at the apex, elsewhere glabrate, minutely 5-dentate; stamens 
7, the filaments very unequal, the anthers 1 mm. long; pistillate flowers and fruit not 
known. 
1 Bull, Torrey Club 81: 611-615. 1904. 
? Contr. U. S. Nat. Herb. 12: 373. 1909. 
