332 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
long, each wing having 3 or more incurved teeth straw-color; the inner surface 
of each fruit in most species furnished in place of the ventral nerve with a crest 
1 mm. high or more, with the margin entire or slightly toothed, the crest wider 
below, i. e., at the end at which the fruit is attached. 
The remarkable fruit of this plant separates it at once from any other 
species of the genus. Type U. S. National Herbarium no, 349027, collected at 
Holbrook, Arizona, July 15, 1896, by Myrtle Zuck. 
2. Wedelia glabra (Choisy) Standley. 
Allionia incarnata glabra Choisy in DC, Prod, 18°: 435, 1849. 
Annual; stems reddish, prostrate, much branched from the base, slender, 
sparingly white-puberulent with rarely a few longer, soft, white hairs: leaf 
blades oblong or elliptical, 28 mm. or less in length and 11 mm. or less in 
width, obtuse at the apex, rounded or sometimes oblique at the base, almost 
glabrous, yellowish-green above, glaucous below and usually conspicuously 
purplish; petioles shorter than the blades, mostly about one-third as long, 
slender; peduncles 11 mm. or less in length, usually one at each node; bracts 
somewhat saccate, broudly obtuse, ciliolate, puberulent; flowers 4 mm. long or 
less, rose-red; stamens included; fruit light straw-color or greenish, + mm. 
long and about as wide, with 8 prominent vertical ribs on the ventral surface 
and about 7 sharp, narrow, long teeth on each side, these usually not incurved, 
but extended in the same plane as the body of the fruit; on the dorsal surface 
of the fruit are two rows of short-pediceled glands, about 6 glands in each 
row; leaves more or less wiavy-margined and the whole surface of the blade 
often more or less wavy. 
The deseription is based upon plants collected in the Mesilla Valley, New 
Mexico, which seem well to match portions of the type collection preserved in 
the Bernbardi Herbarium. The name glabra is not an especially appropriate 
one, 
The species is distinguished by its peculiar fruit whose wings are not in- 
curved as they are in other species; whose teeth, too, are sharper and more 
numerous. It is also separated by its small, obtuse, purplish and often 
glaucous, undulate leaves, and by its slender stems. It is, in New Mexico 
and in other places from which I have examined specimens with roots, an 
annual plant, while most of the other species are perennials. 
Specimens eramined: 
Mexico: Environs de Mexico (City), Berlandier, type collection; San 
Tas Potosi, 1879, Schaffner 562; near Saltillo, 1848, Gregg 466, 484. 
Arizona: Long H Ranch to St: John’s, 1908, Griffiths 5193; Beaver Creek, 
1883, Rusby 355. 
Texas: Near Colorado, 1900, Aggert. 
New Mexico: Mesilla Valley, 1900, Wooton; Mesilla Valley, 1907, Wooton 
& Standley 3893; Albuquerque, 1894, Herrick; Santa Fe, 1847, Fendler 
634: 20 miles south of Roswell, 1900, Karle 321: Gray, 1898, Skehan 102; 
Santa Fe, 1898, Cockerell; Santa Fe, 1881, Hngelmann; south of Las 
Cruces, 1906, Standley; Delaware Creek, 1893, Nealley (in part). 
3. Wedelia incarnata (L.) Kuntze, Rev. Gen. Pl. 583, 1891. 
Allionia incarnata 1. Syst. ed. 10. 890. 1759. 
Although I have separated several varieties from this species, the specimens 
included here would probably bear still further division. The greatest trouble 
in making separations is found in the occurrence of numerous intergrading 
forms. Forms are found which connect all of these varieties with the species, 
