72 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
form or linear (sometimes a little broader) segments, and small white 
flowers in naked unequally few-rayed umbels. 
First species cited, A. angustifolium Nutt. 
A North American genus containing two species, one Californian, 
the other in the Missouri-Texas region. 
Umbels sessile; fruit cordate at base; Californian.........----- 1. A. angustifolium. 
Umbels peduncled; fruit rounded at base; Missouri-Texas............ 2. A. patens. 
1. Apiastrum angustifolium Nutt. in Torr. & Gray, FL1: 644. 1840, 
A, latifolium Nutt. 1. ¢. 
(?) Helosciadium leptophyllum (2) latifolium Hook. & Arn. Bot. Beechey 347. 
1840. 
Slender, 0.5 to 3 dm. high, sometimes simple, usually much branched; 
leaves 2.5 to5 em. long, biternately or triternately divided, with linear 
or nearly filiform segments (rarely linear-oblong); umbels sessile; rays 
from 2.5 em. long to wanting; pedicels 1.2 cm. long to wanting; fruit 
with narrow commissure, cordate in outline, 1 mm. long. 
Type locality, **San Diego, California;” collected by Vuttall; type 
in Herb. Gray. 
California, from Mendocino County southward, and extending into 
Lower California. 
Specimens examined: 
CALIFORNIA: San Luis Rey, Mer. Bound. Surv., in 1850; near Clear Lake, Torrey 
160, in 1865; Kellogg & Harford 305, in 1868-69; Santa Clara County, Mrs. 
Ames, in 1877; San Diego, Jones 3089, March 20, 1882; same station, Pringle, 
May 4, 1882; same station, Orcutt, in 1886 and 1889; Oakland Hills, Chesnut, 
May 9, 1888; same station, Lemmon 50, in 1889; Los Angeles, Hasse, April, 
1891; Vaca Mountains, Jepson, June 20, 1892; San Isabel, Henshaw, April 
18, 1893; near San Bernardino, Parish, May, 1893; Amador County, altitude 
120 meters, Hansen 1042, April 18, 1895; San Nicholas Island, Blanche Trask, 
April, 1897; Avalon, Santa Catalina Island, Blanche Trask, May, 1897; 
Monterey County, Plaskett 102, April, 1898. 
We have not seen the Hooker and Arnott plant referred to under the synonymy. 
It has priority of publication, but the description is not definite enough to make us 
certain of this reference. 
2. Apiastrum patens (Nutt.) C. & R. Rev. N. Am. Umbell. 110. 1888, 
Fic. 10. 
TLeptocaulis patens Nutt. in DC. Prodr. 4: 107. 1830. 
Apiwn patens Watson, Bibl. Index, 418. 1878, 
Slender, 3 to 6dm. high, branching above; leaves 2.5 to 5 em. long, 
ternately or biternately divided, with long filiform segments; umbels 
long-peduncled; rays and pedicels as in A. angustifoliun, truit with 
broader commissure, ovate, slightly larger, rounded at base. 
Type locality, ‘* Red River,” Arkansas; collected by Wuttadl. 
From the southern border of Lake Michigan to Texas. 
Specimens examined : 
Inpiana: Along railway track, Miller, Lake County, Umbach, June 24, 1898. 
