Part 3, 1916] CARDUACEAE: TAGETEAE 187 
13. Porophyllum Millspaughii B. L. Robinson; Millsp. Field Columb. 
Mus. Publ. Bot. 2: 109. 1900. 
A shrub, with terete, purplish, dichotomous branches; leaves opposite; petioles slender, 
about 5 mm. long; blades elliptic, rounded at each end, sinuate, thin, 2—-3.5 em. long, 1.5-2 cm. 
wide; glands 2 or 3 on each margin, lunate, and a single linear one at the apex; heads cymose; 
peduncles 1.5—2 cm. long; involucre about 12 mm. high, subcylindric; bracts 5, oblong-linear, 
searious-margined, usually brown at the apex, with 2 rows of glands; flowers about 18; corollas 
greenish-white, 9 mm. long, puberulent; tube slender, much longer than the funnelform throat; 
achenes black, hispidulous, somewhat tapering at the apex; pappus sordid. 
TYPE LOCALITY: Progreso, Yucatan. 
DISTRIBUTION: Yucatan and Guatemala. 
14. Porophyllum jorullense (H. B. K.) Cass. Dict. Sci. Nat. 43: 57. 
1826. 
Kleinia jorullensis H. B. K. Nov. Gen. & Sp. 4: 156. 1820. 
A branched shrub, with spreading terete brownish branches; leaves opposite or some of 
them alternate; petioles slender, about 1 cm. long; blades elliptic or oblong, rounded at the 
apex, abruptly acute at the base, 1—2.5 cm. long, repand, membranous, with 1 or 2 marginal 
glands on each side and a single terminal one, or sometimes glandless; heads solitary in the 
forks; peduncles 3-5 cm. long; involucre cylindro-campanulate, 10-12 mm. high; bracts 5, 
linear, acute, glabrous, green, with 2 rows of linear glands; flowers 25-30; corollas puberulent, 
about 1 cm. long, cream-colored; tube slender, many times as long as the funnelform throat; 
achenes 7 mm. long, hispidulous; pappus straw-colored, 6 mm. long; bristles scabrous. 
TYPE Locatity: On the eastern declivities of the volcano Jorullo. 
DISTRIBUTION: Jalisco to Sinaloa. 
ILLUSTRATION: H. B. K. Nov. Gen. & Sp. pl. 356. 
15. Porophyllum Palmeri Rose, Contr. U. S. Nat. Herb. 1: 338. 
1895. 
A glabrous shrub, 1 m. or more high, divaricately branched, with reddish glabrous twigs; 
leaves opposite; petioles slender, 5-10 mm. long; blades firm, lanceolate or oblong, acute or 
obtuse at the apex, acute at the base, 1-4 cm. long, with 2-4 linear glands along each margin; 
heads cymose-corymbose; peduncles 1.5—2.5 em. long; involucre cylindro-campanulate, about 
12 mm. high; bracts 5, linear, greenish, acuminate, with 2 rows of linear glands; flowers about 
20; corollas nearly white, about 1 cm. long; tube slender, several times as long as the funnel- 
form throat; lobes lanceolate; achenes 7 mm. long, hispidulous, somewhat tapering at the 
apex; pappus straw-colored, 7 mm. long; bristles scabrous. 
Tyre LocaLity: Colima. 
DisTRIBuTION: Known only from the type locality. 
ILLUSTRATION: Contr. U. S. Nat. Herb. 1: pl. 34. 
16. Porophyllum Nelsonii Rob. & Greenm. Proc. Am. Acad. 32: 32. 
1896. 
A branching shrub, 3-6 dm. high; branches terete, purple; leaves opposite; petioles 4-6 
mm. long; blades small, oblong or elliptic, obtuse, 1-1.5 cm. long, about 0.5 cm. wide, tapering 
at the base, with 0-2 marginal glands on each side and a single terminal one; heads cymose- 
corymbose; involucre narrowly campanulate, about | cm. high; bracts 5, linear-oblong, acute, 
purple, with 2 rows of linear glands; flowers about 30; corollas dark-purple, about 7 mm. 
long; tube puberulent, fully twice as long as the elongate-funnelform throat; achenes 6-7 mm. 
long, hispidulous, tapering at the apex. 
Tyrz LocaLity: Between Panixtlahuaca and Jaquila, Oaxaca. 
Distripution: Oaxaca. 
