94 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
densely short-villous; sepals oblong-oval, 1.5 mm. long, rounded at the apex, 3-nerved, 
densely pilose with soft white hairs; filaments subulate-linear, shorter than the sepals, 
the staminodia one-third as long as the filaments, narrowly triangular, entire; style 
short, the stigmas slender; utricle orbicular, compressed; seed orbicular, 1 mm. 
broad, dark reddish brown, shining. 
Type in the U. 8S. National Herbarium, no, 636123, collected on a dry hillside at 
Topolobampo, Sinaloa, Mexico, March 23, 1910, by J. N. Rose, P. C. Standley, and 
P. G. Russell (no. 13292), Also obtained at the same locality in 1897 by Edward 
Palmer (no. 191), 
Similar in most respects to Iresine angustifolia, but distinguished by the well-devel- 
oped staminodia, the obtuse or rounded rather than acute or acutish sepals, and the 
densely villous bracts. 
Iresine calea (Ibffiez) Standley. 
Gomphrena latifolia Mart. & Gal. Bull. Acad. Sci. Brux. 10*: 349. 1843. 
Alternanthera latifolia Moq. in DC. Prodr. 1837: 351, 1849. 
Achyranthes calea Ibfiiez, Naturaleza 4: 79. 1879. 
Tresine latifolia Benth. & Hook. Gen. Pl. 3: 42. 1880, not J. latifolia D. Dietr. 
1839. 
Tresine lava S. Wats. Proc. Amer. Acad. 21: 454, 1886, 
There are very few North American species of Iresine which have so extensive a list 
of synonyms as the present species. Usually it has been known as Jresine latifolia 
(Mart. & Gal.) Benth. & Hook., but that name is homonymous and consequently not 
available, In spite of the fact that Ibéfiez uses several large pages of text and a col- 
ored plate to characterize his proposed species, the present writer is not absolutely 
certain that that plant is the same as the one heretofore known as Iresine latifolia. 
Ibafiez’s description, however, applies better to the latter species than to any other 
of which the writer has seen specimens, and his material came from a region in which 
I, latifolia is known to grow; for which reasons it seems best to use Ibéfiez’s name in 
this application, at least for the present. 
Iresine costaricensis Standley, sp. nov. 
Scandent shrub, much branched, the branches stout, terete, smooth, the younger 
ones and those of the inflorescence densely pubescent with short stout appressed ful- 
vous hairs; petioles stout, 7 to 17 mm. long; leaf blades oval to oblong-elliptic, 11 to 
18 cm. long, 4 to 7 cm. wide, abruptly acuminate or long-attenuate, obtuse at the base, 
thick, sparsely short-villous on the upper surface and deep green, appressed-pilose 
beneath with slender stiff hairs; flowers perfect, in a loose, much branched, naked, 
terminal panicle sometimes 50 cm. long, the branches slender, spreading, opposite or 
verticillate, the spikelets 3 mm, thick or less, sessile, few-flowered, the rachis canes- 
cent; bracts and bractlets less than half as long as the sepals, suborbicular, fuscous- 
stramineous, sparsely short-villous; sepals oval-oblong, 1.5 mm. long, obtuse, 3-nerved, 
brownish-fuscous, densely pilose, the hairs stiff, grayish, scarcely exceeding the 
sepals; filaments shorter than the sepals, the staminodia short, entire; style short, 
the stigmas short and stout. 
Type in the U.S. National Herbarium, no. 861225, collected at Las Vueltas, Tucu- 
rrique, Costa Rica, in 1899, by A. Tonduz (Inst. Fis. Geogr. Costa Rica, no, 13183). 
Also collected at the same locality by the same collector in 1898 (no. 12919). 
The proposed species belongs to that section of the genus which was once given 
generic rank by Martius under the name Trommsdorffia. It is a relative of Iresine 
argentata (Mart.) D, Dietr., a species occurring in Porto Rico, Colombia, and Venezuela, 
which has larger flowers, mostly pedunculate spikelets, and acute or abruptly acute 
leaf blades. 
