Par? 3, 1916] CARDUACEAE: TAGETEAE 191 
30. Porophyllum porfyreum Rose & Standley, sp. nov. 
A shrub, with slender spreading slightly angled branches; leaves linear-filiform, 4-6 cm. 
long, about 1 mm. wide; heads solitary at the ends of the branches; peduncles 2-4 cm. long, 
slightly thickened upwards; involucre campanulate, about 10 mm. high and 7 mm. broad; 
bracts elliptic, obtuse, light-brown, tinged with purple, striate, with small oblong, scattered 
glands; corollas hispidulous, 6 mm. long, purplish, the lanceolate lobes margined with yellow; 
tube longer than the elongate-funnelform throat; achenes 7 mm. long, hispidulous; pappus 
tinged with purple, 5 mm. long; bristles hispidulous. 
Type collected at San José del Cabo, Lower California, March 26, 1911, Rose 16478 (U. S. 
Nat. Herb.). 
31. Porophyllum leucospermum Greene, Leaflets 2: 155. 1911. 
An undershrub, about 3 dm. high; stem fastigiately branched from the base; branches 
stiff, suleate, and decidedly glaucous; leaves almost filiform, 1-3 cm. long, with a few marginal 
glands; heads solitary at the ends of the branches; peduncles 1-4 cm. long; involucre campanu- 
late, about 1 cm. high; bracts 5, broadly linear, somewhat round-keeled and gibbous at the 
base, with 2 rows of glands, green and glaucous, slightly tinged with pinkish; corollas 7 mm. 
long, white or nearly so, with purplish streaks; tube several times as long as the elongate- 
funnelform throat; lobes narrowly lanceolate; achenes 7 mm. long, straw-colored, hirsutulous, 
slightly tapering at the apex; pappus straw-colored or slightly tinged with rose, 6 mm. long; 
bristles hispidulous. 
TYPE LocaLity: Vegas Valley, Lincoln County, Nevada. 
DISTRIBUTION: Nevada. 
32. Porophyllum gracile Benth. Bot. Voy. Sulph. 29. 1844. 
Porophyllum caesium Greene, Leaflets 2: 155. 1911. 
A suffrutescent perennial, 2-5 dm. high; stems angled or sulcate, branched, scarcely 
glaucous; leaves scattered, filiform, 2-4 cm. long; heads solitary at the ends of the branches; 
peduncles 1-3 cm. long; involucre campanulate, 8-10 mm. high; bracts 5, broadly linear, 
mostly obtuse, purple and sometimes somewhat glaucous, rounded on the back and some- 
what gibbous at the base, with few glands, usually in two rows; corollas 8 mm. long, straw- 
colored with purple streaks, puberulent; tube shorter than the elongate-funnelform or nearly 
trumpet-shaped throat; lobes lanceolate; achenes 8-9 mm. long, hispidulous, dark-brown, 
tapering at the summit; pappus straw-colored, sometimes tinged with rose. 
TYPE Locality: Bay of Magdalena, Lower California. 
DistRIBuTIoN: Lower California and southern California. . 
33. Porophyllum Vaseyi Greene, Leaflets 2: 154. 1911. 
A perennial herb, with cespitose underground stem; stems 1.5—2 dm. high, glaucous, 
striate; leaves alternate, filiform, 1-2 cm. long; heads solitary at the end of the branches; 
involucre narrowly campanulate, 9-10 mm. long; bracts oblong-linear, obtuse, pale, pinkish 
on the margins, rounded on the back, and slightly gibbous at the base, with few linear or 
oblong glands in 2 rows; corollas 7 mm. long, pale with dark streaks, decidedly pubescent; 
tube longer than the trumpet-shaped throat; lobes lanceolate; achenes 8 mm. long, hirsute; 
pappus 6 mm. long, tinged with rose; bristles hispidulous. (Perhaps a depauperate form of the 
preceding.) 
Tyre LocaLity: Mountain Spring, San Diego County, California. 
DistrR1BuTion: Known only from the type locality. 
34. Porophyllum junciforme Greene, Leaflets 2: 154. 1911. 
Porophyllum Greggii A. Gray, Pl. Wright. 1: 120, in part. 1852. 
A shrub, 3-6 dm. high; stems with long and rush-like branches, sulcate, glaucous; leaves 
alternate, scattered, sessile, almost filiform, 2-4 cm. long; heads solitary at the ends of the 
branches; peduncles 2-3 cm. long; involucre oblong-campanulate, 10-12 mm. high; bracts 5, 
green and glaucous, slightly tinged with pink on the margins, broadly linear to oblong-oblance- 
