, 
COULTER AND ROSE—NORTH AMERICAN UMBELLIFERAE. 167 
Involucels with entire bractlets. 
Involucre mostly conspicuous; bracts and bractlets 1 to 3-nerved. 
Fruit oblong, 8 mm. long.............-..-....------..------ 3. P. bulbosus. 
Fruit orbicular, 10 to 12 mm. long ...........2.-...----- 4. P. purpurascens. 
Involucre mostly a low hyaline sheath; bracts and bractlets many-nerved. 
5. P. multinervatus, 
1. Phellopterus montanus Nutt. in Torr. & Gray Fl. 1: 624. 1840. 
Fig. 50. 
Cymoplerus montanus Torr. & Gray Fl. 1: 624. 1840. 
Flowering umbels compactly clustered at the base of the rosette of 
much longer leaves, often appearing sessile, somewhat elongated in 
fruit; involucre inconspicuous, hyaline and lobed, sometimes reduced 
to a cup; involucels conspicuous, the bractlets distinct, obovate, entire, 
with very broad white and hyaline margins, with more or less distinct 
green central region; pedicels shorter than the bractlets; flowers white, 
sometimes purplish; fruit broadly oblong to nearly orbicular, 6 to 8 
mm. long, with broad thin wings somewhat thickened at insertion; oil 
tubes 1 to 3 in the intervals, 4 to 8 on the commissural side; seed some- 
what flattened, with broadly concave face. 
Type locality, ‘high bare plains of the Platte, toward the Rocky 
Mountains;” collected by Nufttal/; type in Herb. Philad. Acad. 
Open plains of Colorado, Arkansas, Wyoming, Kansas, Nebraska, 
and South Dakota. 
Specimens examined: 
CoLtorabo: Type specimens as cited under type locality; Hall & Harbour 210, in 
1862; Pueblo, //icks, June 8, 1890; near Denver, Alice Hastwood, in 1891; 
near Windsor, Osterhout, May, 1895; near Denver, Bethel, May, 1895, and 
June, 1898; Fort Collins, Crandall, May 30, 1896; near Denver, Holzinger, 
May-June, 1896; Colorado Springs, Rydberg, May 9, 1900. 
Wyomina: Fort Russell, Ruby, May, 1885; Laramie Plains, Nelson, May, 1893 
and 1894. 
SoutH Dakota: Black Hills, Rydberg 726, June 14, 1892. 
NEBRASKA: Deuel County, Rydberg, June 27, 1891. 
Kansas: Spearsville, Ford County, Wentz, April, 1886; Atwood, Fry, April 18, 
1891. 
ARKANSAS: Fort Lyon, Palmer, April 9, 1863. 
2. Phellopterus macrorhizus (Buckley) C. & R. 
Cymopterus macrorhizus Buckley, Proc. Philad, Acad. 1861: 455. 1862. 
Cymopterus montanus pedunculatus Jones, Proc. Calif. Acad. Sci II. 5: 686, 
1895. 
Resembling 7. montanus, but peduncles elongated, in fruit becom- 
ing twice as long as the leaves; umbels open, with longer unequal rays 
and longer pedicels; involucels of distinct usually obovate bractlets, 
with one to several nerves, and lacerate-fringed at apex; flowers 
pinkish; fruit smaller, 4 mm. long. 
Type locality, ** prairies north of Austin,” Tex.; collected by Buck- 
ley, March, 1860; type in Herb. Philad. Acad. 
Northeastern Texas. 
