94 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Mexico, State of Puebla: calcareous hills near Tehuacan, altitude 
1725 m., 22 August, 1901, C. G. Pringle, no. 8570 (hb. Gr.). 
Archztogeron purpurascens. An herbaceous perennial, pubes- 
cent throughout with mostly appressed-hirsute hairs: stem erect or 
ascending, simple or branched, 2 to 4 dm. high: lower leaves oblanceo- 
late, 2 to 6 cm. long, 3 to 10 mm. broad, obtuse, subentire to rather con- 
spicuously toothed with remote spreading teeth, the uppermost leaves 
lanceolate and entire: heads terminating the stem and branches on 
rather long peduncles, including the rays about 2.5 cm. broad ; involucral 
scales 2—3-seriate, narrowly lanceolate, acuminate, appressed-pubescent : 
ray-flowers in about 3 series, numerous, deep purple : disk-flowers numer- 
ous; pappus coroniform, of united more or less lacerated scales. — 
Mexico. State of Chihuahua: Sierra Madres, near Colonia Garcia, 
altitude 2450 m., 27 July, 1899, Townsend & Barber, no. 175 (hb. Gr.). 
Erigeron adenophorus. Suffruticose: stem branched; branches 
hirsute, and more or less glandular-pubescent, leafy towards the tip: 
leaves sessile, crowded, amplexicaul, at first erect or spreading, later 
reflexed, linear-lanceolate, 1 to 2 cm. long, 2 to 5 mm. broad, mucronate- 
acute, sparingly dentate with minute spreading subcartilaginous teeth, 
densely glandular-pubescent intermixed with long jointed flaccid hairs ; 
margins revolute: inflorescence terminating the stem and branches in 
dense round-topped corymbose cymes: heads about 1 cm. high: involucre 
campanulate; bracts 3—4-seriate, lance-linear, acute, the outer densely 
pubescent with long jointed subflaccid and somewhat matted hairs, the 
inner terminated by a glabrous purplish tip : ray-flowers mostly 2-seriate ; 
achenes strongly compressed, with thick nerviform margins and a single 
nerve on either surface, puberulent; corolla-tube slender, puberulent, 
slightly ampliated and expanded above into a purplish minute incon- 
spicuous ligule, or remaining essentially tubular; style included: disk- 
flowers numerous ; the 5-toothed limb of the corolla deep purple at least 
in the dried state ; achenes like those of the ray-flowers. — Senecio erio- 
cephalus, Klatt, Bull. Soc. Bot. Belg. xxxi. 212 (1892), and Leopoldina 
xxxi. (1895) Beiblatt, p.7.—Cosra Rica. Entre le Rancho del Jabon- 
cillal et le sommet de Cerro de Buenavista, et les roches, altitude 3100 
m., 19 January, 1891, H. Pittier, no. 3425 (hb. Gr.). 
A careful examination of the type of Senecio ertocephalus, Klatt, shows 
very clearly that the plant is widely remote from Senecio ; its affinity is 
rather with Hrigeron and Oonyza. Because of the comparatively small 
number of ray-flowers and the character of the same, namely the included 
‘style, and the distinctly nerviform margins of the compressed achene, it 
