Part 3, 1916] CARDUACEAE: TAGETEAER 181 
Leaves simple. 
Leaves clavate, fleshy. 1 
Leaves filiform, slender. 2 
Leaves pinnatifid. 
Segments obliquely deltoid, acute, entire. 3. C. pinnata. 
Segments cuneate, truncate, toothed. 4. C. truncata. 
. C. mexicana, 
. C. acerosa. 
1. Chrysactinia mexicana A. Gray, Mem. Am. Acad. II. 4: 93. 
1849. 
Pectis taxifolia Greene, Leaflets 1: 148, 1905. 
A shrub, 1-6 dm. high; branches erect, sulcate, glabrous, somewhat glutinous, in age 
roughened by the leaf-scars; leaves fleshy, simple, entire, linear, somewhat clavate, 8-15 mm. 
long, spinulose-tipped, copiously glandular; peduncles 1-4 cm. long, glabrous; involucre 
hemispheric, 5-6 mm. high, 8-10 mm. broad; bracts linear, each with a single large gland; 
ligules 8-10 mm. long, 2 mm. wide; disk-corollas 5 mm. long, cylindric, the tube and throat 
searcely differentiated; lobes ovate; achenes linear, many-striate, hispid, 4 mm. long; pappus 
5 mm. long. 
Tyre Locauity: Saltillo, Chihuahua. 
DISTRIBUTION: Texas and New Mexico to Vera Cruz and State of Mexico. 
2. Chrysactinia acerosa Blake, Proc. Am. Acad. 51: 525. 1916. 
A low shrub; branches erect, glabrous, grayish; leaves very slender, filiform, 1 cm. long 
or less, spinulose-tipped, with minute glands; peduncles 1-1.5 cm. long; involucre rounded- 
campanulate, 3-4 mm. high, 4-5 mm. broad; bracts oblong, obtuse, each with a single linear- 
oblong conspicuous gland; ligules 6 mm. long, 2 mm. wide; disk-corollas 4 mm. long; achenes 
2 mm. long or more, hispidulous; pappus 4 mm. long. 
Type Locatitry: Sierra de Guascama, Minas de San Rafael, San Luis Potosi. 
DISTRIBUTION: Known only from the type locality. 
3. Chrysactinia pinnata S. Wats. Proc. Am. Acad. 25: 154. 1890. 
A shrub, 3 dm. high or more; branches glabrous or nearly so, slender, striate; leaves 
opposite, lanceolate in outline, 3-6 em. long, pinnately divided into 7-21 obliquely deltoid 
segments, the upper margins of which are at about right angles to the rachis; peduncles 3-6 
em. long; involucre hemispheric, 6 mm. high, 8-10 mm. broad; bracts 8, each with a single 
oblong gland, glabrous; ligules 5-6 mm. long, ochroleucous inside, bright-orange outside; disk- 
corollas 4.5 mm. long; tube shorter than the trumpet-shaped throat; lobes triangular; 
achenes 3 mm. long, striate, hispid; pappus tawny, 3.5 mm. long. 
TyPE Locality: Near Monterey, Nuevo Le6én. 
DISTRIBUTION: Nuevo Leén. 
4. Chrysactinia truncata S. Wats. Proc. Am. Acad. 25: 154. 1890. 
A low shrub, 2-3 dm. high; branches glabrous; leaves opposite or alternate, 1.5-3 cm. long, 
pinnately divided into 3-7 cuneate, truncate, few-toothed, mucronate segments, with a single 
gland at the base of the mucro; peduncles 2-4 cm. long; involucre hemispheric, 5 mm. high, 
8 mm. broad; bracts about 12, each with a single gland; ligules bright-yellow, 7-8 mm. long; 
disk-corollas 5 mm. long; tube slightly gibbous at the base, shorter than the trumpet-shaped 
throat; lobes ovate; achenes 2.5 mm. long, strongly striate, hispid; pappus tawny, 4 mm. long. 
Tyre Locatiry: Summit of Sierra de la Sila, Nuevo Leén. 
Distrrvution: Coahuila and Nuevo Leén. 
19. POROPHYLLUM* (Vaillant) Adans. Fam. Pl. 2: 122. 1763. 
Kleinia Jacq. Enum. Pl. Carib. 8. 1760. Not Kleinia L.; Mill. 1754, 
Hunteria Moc. & Sessé; DC. Prodr. 5: 649, as synonym, 1836. Not Hunteria Roxb. 1814. 
Annual or perennial herbs, or low shrubs. Leaves alternate or opposite, or both, simple, 
their blades varying from broad, sinuate, and slender-petioled to filiform, entire-margined, 
* Also written Porophyllon. 
