STANDLEY—ALLIONIACEAE OF THE UNITED STATES. 331 
Prof, 'T. D. A. Cockerell,* guided evidently by the original description of this 
species, was led to found upon it a separate section of the genus under the name 
Roswellia. The plant certainly does not differ generically from A. capitata, 
us he was inclined to believe, and I think it can not be worthy even of a 
separate section. 
Specimens examined: 
NEW Mexico; Roswell, 1902, Wilmatte P. Cockerell, type; Dexter, 1905, 
Wooton; 20 miles south of Roswell, 1900, Earle 824; Delaware Creek, 
1893, Neailey 4. 
TEXAS: Screw Bean, 1893, Vealley 5, 
4. WEDELIA lLwefl. 
Wedelia Toefl. Iter Hisp. 180. 1758. 
Allionia 1. Syst. ed. 10. 890. 1759, in part. 
Annual or perennial prostrate herbs; leaves opposite, unequal, entire, 
petioled; flowers reddish or rarely white, 5 in each involucre: involucres com- 
posed of 3 sepal-like bracts which are united at the base, solitary on peduncles 
in the axils of the leaves; perianth corolla-like, with a short oblique tube and 
an unequally 4-lobed limb; stamens exserted or included, their filaments slen- 
der; ovary 1-celled, the style filiform, stigma capitate: fruit leathery, winged 
on each side, smooth upon the inner side or crested in oné species, but with two 
parallel rows of glands on the outer surface. 
The plant upon which this genus was founded later received the name of 
Allionia incarnata IL. 
KEY TO THE SPECIES. 
Irruit crested on the inner surface____________________ 1. W. cristata, 
Fruit not crested on the inner surface. 
Wings with numerous sharp teeth, these not incurved_ 2. We glabra. 
Wings with fewer teeth, which are much less acute and 
usually strongly incurved. 
Stems villous; teeth obtuse, 2 or 3; perianths large 
about 12 mm. wide; stems abundantly leafy above. 8b. W. dncarnata 
rillosa, 
Stes mostly pubescent, but not strongly villous. 
Upper internodes long and the upper leaves con- 
siderably reduced —----------------__- se. W. inearnata 
nudata, 
Upper internodes not especially long and the up- 
per leaves not noticeably reduced: teeth obtuse 
to somewhat acute ~~ ~~~ oO. We dnearnata, 
1. Wedelia cristata Standley, sp. nov. 
Stems rather slender, viscid-puberulent, straw-colored ; leaf blades elliptical 
to oblong, the two sides asymmetrical, acute, oblique at the base or rounded, 
dull green above and paler beneath, sparingly short-puberulent, especially above, 
21 mm. or less in length and 14 mm. or less in width; petioles one-third to one- 
half as long as the blades; peduncles 18 mm. long or less; bracts almost orbicu- 
lar, slightly saccate, rounded at the apex, 8 mm. long or less; flowers 8 or 9 
mm. long, the lobes of the perianth with deep and narrow sinuses between them, 
the lobes themselves rather deeply 2-cleft; stamens included; fruit 4 to 5 mm. 
Proce. Biol, Soc, Wash, 16: 52. 
