192 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
1. Polytaenia nuttallii DC. Coll. Mém. 5: 54. pl. 18. 1829.) Fig. 57, 
Plants 6 to 9 dm. high, mostly glabrous except the pubescent. pedi- 
cels and involucels; leaf segments cuneate and incised; upper leaves 
opposite and 3-cleft; umbel 6 to 12-rayed; rays about 2.5 em. long; 
pedicels 2 to 4mm. long; fruit 6 to 10 mm. lone; dorsal and interme- 
diate ribs obsolete and oil tubes superficially indistinct; lateral wings 
very thick, leaving the body more or less depressed. 
Type locality, *territoire de PArkansa:” collected by Vutfall in 
1825; type in Herb. DC., duplicate in Herb. Philad. Acad. 
Dry soil, from southern Michigan and Wisconsin to Alabama and 
Texas. 
Specimens examined: 
Wisconsin: Oshkosh, Kellerman. 
Iuirnors: Athens, /al/, June, 1868; Marion County, French, June 7, 1873. 
TENNESSEE: Near Nashville, Gallinger. 
Missouri: Allenton, Letlerman, August, 1880; Desoto, Hasse, June, 1887; Shannon 
County, Bush, June 2, 1890; Eagle Rock, Bush, 159, June 22, 1897. 
INDIAN TerRITORY: Muscogee, Carleton, April 25,1891 (in flower). 
OKLAHOMA: Paradise, Waugh, June 22, 1893. 
Texas: Near Hockley, Thurow, September, 1890; College Station, Dewey, June 
10, 1891. 
Several other Texan sheets were examined, but as the plants are only in flower it 
is impossible to determine whether they are the species or its variety. The speci- 
mens are as follows: Fort Chadbourne (Swift in 1856); Tlouston (/Tall 257 in 1872); 
Gillespie County (Jermy 138); Houston (Rose in 1899), 
Polytaenia nuttallii texana C. & R., var. nov. 
Fruit more commonly obovate, with much thinner wings (the body 
not at all depressed), filiform dorsal and intermediate ribs, and distinct 
and broader oil tubes. 
Type locality, near Industry, Tex.; collected by Waurzlow in 1895; 
type in U.S. Nat. Herb. 
Southern Texas. 
Specimens examined ; 
Texas: San Antonio, /avard, in 1882; Kerrville, Kerr County, /Teller 1669, June 
25, 1894; type specimens as cited under type locality. 
56. OXYPOLIS Raf. Neogen, 2. 1825, 
Tiedemannia DC. Coll, Mém. 5: 51. 1829, 
Archemora DC. Coll, Mém. 5: 52. 1829, 
Calyx teeth evident. Fruit flattened laterally, ovate to obovate, 
glabrous. Carpel with dorsal and intermediate ribs filiform; lateral 
wings closely contiguous to those of the other carpel and nerved dor- 
sally at the inner margin (giving the appearance of 5 filiform ribs on 
the back of each carpel); strengthening cells beneath the dorsal ribs 
and nerves of the lateral wings. Stylopodium thick, short conical. 
Oil tubes solitary in the intervals, 2 to 6 on the commissural side. 
Seed face plane. 
