118 PROCEEDINGS OF THE AMERICAN ACADEMY. 
petioles 1}~14 inches long, often somewhat winged or lobed near the 
summit: terminal inflorescences about 2 inches long, rather closely 
flowered, staminate, except at the very base ; inflorescences springing 
from the upper axils several, very short, chiefly fertile; ¢ pedicels 
flexuous, 2 lines long, white tomentose and not at all glandular; invo- 
lucres cinereous, rotate, 2 lines in diameter, unequally 9-10-toothed, 20- 
flowered ; teeth obtuse; 9 involucres at first ovoid, acute, 2-beaked, 
2-celled ; spines (scales) about 24, appressed, imbricated ; achenes sol- 
itary in each cell; fruit 2} lines long, puberulent and finely glandular, 
corrugated toward the narrowed base ; the spines spreading, 3 line long. 
— Collected on plains near Casas Grandes, Chihuahua, by Mr. Hart- 
man, 10 October, 1891 (no. 813). 
ENCELIA OBLONGA. Fruticose, 2-3 feet high: branches grayish, 
nearly or quite smooth, finely striated ; branchlets glabrous or hirsute, 
resiniferous : leaves attenuate, subsessile, oblong or oblanceolate, puber- 
ulent, green upon both surfaces, scabrously ciliolate-denticulate, rounded 
or obtuse and mucronate at the apex, cuneate at the base, 1}—2} inches 
long, 6-12 lines broad; veinlets translucent : peduncles solitary, termi- 
nal, sparingly hirsute, 2-3 inches in length, with 2-3 reduced leafy bracts 
and a solitary head about an inch in diameter exclusive of the rays: 
involucral bracts in two series, subequal, lanceolate, caudate-attenuate, 
ciliolate, 5-6 lines long: rays 12-15, yellow, nearly half an inch in 
length: disk corollas with throat cylindrical, 2 lines long, much exceed- 
ing the short proper tube and still shorter glabrous limb: achenes 
24 lines long, appressed silky villous and crowned with two weak un- 
equal readily deciduous ciliolated awns; the larger one, on the side 
Opposite the enclosing palea, two thirds as long as the corolla. — 
Collected on plains near Casas Grandes, Chihuahua, by Mr. Hartman, 
10 October, 1891 (no. 812). 
Lerrosyne Arizonica, Gray, var. PUBESCENS. Soft pubescent 
throughout: leaves tending to have somewhat broader segments: not 
otherwise differing from the glabrous type. — Collected at Granados, 
Sonora, at 2,950 feet, by Mr. Hartman, 15 November, 1890 (no. 222); 
hear Huchuerachi, at 4,000 feet, by the same collector, 5 December, 
1890 (no, 296); and at Cardovas, Sonora, by Mr. Lloyd, 9 December, 
1890 (no. 406), 
Perityie Lioypn. Suffruticose, branching from the base, 4-10 : 
Inches high, cinereous-pubescent, very glandular and aromatic: 
branches slender, terete, more or less decumbent: leaves opposite 
below, subalternate abo , ovate-deltoid, acute, somewhat doubly 
dentate, 8-12 lines long,\ pubescent upon both surfaces; petioles 
