Part 3, 1916] CARDUACEAE: TAGETEAE 185 
with a single median row of glands; flowers about 12; corollas nearly white, 7 mm. long; tube 
very slender, many times longer than the funnelform throat; lobes lanceolate; achenes 7 mm. 
long, narrowly cylindric, hispidulous; pappus straw-colored, 6-7 mm. long; bristles scabrous. 
Type Locatity: Barranca near Guadalajara [Jalisco]. 
DIsTRIBuTION: Jalisco. 
5. Porophyllum calcicola Rob. & Greenm. Proc. Am. Acad. 39: 116 
1903. 
A glabrous annual; stem erect, much branched, green or purplish, more or less glaucous; 
stem-leaves opposite; petioles 0.5—2 cm. long, slender; blades oblong or obovate, 0.5—3.5 cm. 
long, 0.3—1.5 cm. wide, rounded at the apex, cuneate at the base; glands few (1-5), marginal; 
heads few, erect; peduncles 1-3 cm. long; involucre about 12 mm. high, clavate; bracts 5, 
linear, acute, often purple- or blue-tinged; flowers 18-20; corollas 7 mm. long; tube yellowish, 
slender, passing into the dark-purple funnelform throat; achenes 6-7 mm. long, hispidulous; 
pappus straw-colored, 5 mm. long; bristles scabrous. 
TYPE LOCALITY: Mountains above Iguala, Guerrero. 
Distripution: Guerrero and Morelos. 
6. Porophyllum quinqueflorum Brand. Zoe 5: 225. 1905. 
A divaricately branched annual; stem 5-6 dm. high, branched above the middle, terete, 
somewhat striate; leaves alternate; petioles filiform, 2-3 cm. long; blades obovate or oblance- 
olate, rounded at the apex, tapering at the base, 2-5 cm. long, 1—2 cm. wide, very thin; glands 
0-7, marginal; peduncles from the axils of the leaves, divaricate, 1-2.5 em. long; involucre 
clavate-cylindric, about 1:5 cm. high; bracts 5, narrowly linear, acute, green, with a single 
row of linear glands; flowers about 5; corollas 9 mm. long, ochroleucous; tube filiform, many 
times longer than the funnelform throat; lobes lanceolate; achenes about 8 mm. long, hispidu- 
lous; pappus straw-colored, 7 mm. long; bristles scabrous. 
Type Loca.ity: Cerro Colorado, Sinaloa. 
DisTRIBUTION: Known only from the type locality. 
7. Porophyllum viridiflorum (H. B. K.) DC. Prodr. 5: 648. 1836. 
Kleinia viridiflora H. B. K. Nov. Gen. & Sp. 4: 157. 1820. 
Porophyllum Lindeni Schultz-Bip.; Seem. Bot. Voy. Herald 308. 1857. 
A shrub, 5-10 dm. high; stem branched, terete, glabrous, brown, striate; leaves alternate; 
petioles about 1 cm. long; blades oval or obovate, obtuse or rounded at the apex, abruptly 
contracted at the base, 1.5-4 cm. long, rather firm, reticulate, subentire or undulate on the 
margins, with few marginal glands; heads 1-4 at the ends of the branches, in subracemose 
bracteate clusters; peduncles erect, 1-2 cm. long; involucre cylindric, 12-13 mm. high, green- 
ish; bracts 5, linear, obtuse, with a single median row of linear glands; flowers 15-20; corollas 
greenish or yellowish-white, nearly 1 cm. long; tube slender, hispidulous, 2-3 times as long 
as the funnelform throat; lobes lanceolate; achenes 8 mm. long, hispidulous; pappus straw- 
colored, 7 mm. long; bristles hispidulous. 
Type Locatity: Valladolid [Morelia], Michoacan. 
Distrigution: Tepic to Oaxaca and Vera Cruz. 
8. Porophyllum nutans Rob. & Greenm. Proc. Am. Acad. 32: 31. 
1896. 
Porophyllum Holwayanum Greenman, Proc. Am. Acad. 40: 48. 1904. 
A leafy shrub, with terete brownish branches; leaves mostly opposite; petioles filiform, 
5-10 mm. long; blades thin, oval or elliptic, entire or sinuate, rounded but often mucronate 
at the apex, obtuse or acute at the base, 1.5—5 cm. long, with 4-8 oblong glands close to each 
margin; heads in sub-racemiform leafy clusters at the ends of the branches; involucre cylindric, 
about 12 mm. high; bracts 5, linear, obtuse, green, with 2 rows of linear glands; flowers 15 or 
more; corollas ochroleucous or greenish-white, 8-9 mm. long; tube slender, about 4 times as 
