162 BOTANY. 
description of Mr. Watson.—Puiate IV. Figure 6. A branch, natural size 
7. A disk-flower. 8. Chaff of disk-flower. 9. Ray-flower. 10. Section 
through receptacle. All except the branch enlarged 10-20 diameters. 
HELIANTHUS PETIOLARIS, Nutt.—Tall, erect, hispid; leaves scabrous 
(lower sometimes opposite, upper alternate), ovate or ovate-lanceolate, 
irregularly serrate-acuminate; petioles long (but variable in length) ; 
peduncles terminal; heads large; involucral scales lanceolate or broadly 
lanceolate, acute; disk-corolla hairy at base; achenia villous; pappus of 
“two chaffy awns”; rays large, over an inch long.—Southern Arizona, 
Nevada, and Colorado. 
Hewiantuus annuus, L. (Helianthus lenticularis, Dougl., see Gray, 
Fl. Cal. 1, p. 353; also H. lenticularis, Doug]. vol. v, King’s Report, and 
Preliminary Report of Mr. Watson in Wheeler’s Survey, Washington, 
1874.)—Utah and Colorado. 
Hewiantuus Nurrauun, T. & G.—Nevada and San Luis Valley, Colo- 
rado, with broader leaves (548). 
HELIANTHUS GIGANTEUS, L., var. Uranensis, Eaton —Utah. 
HELIANTHELLA UNIFLORA, T. & G.—South Park, Colorado (546). 
ActinoMERIS* Wricutu, Gray (PI. Fendl. p. 85).—Erect, somewhat 
branching ; stems canescently hispid; leaves sessile or slightly decurrent, 
lower opposite, upper alternate, oblong or lance-ovate, irregularly and 
strongly serrate, thick, scabrous, and distinctly veined, especially beneath; 
heads on naked peduncles (6—12’ long), medium-sized; scales of the invo- 
lucre in 2-4 series, with a short stout pubescence, outer ones shorter, 
oblong and obtuse, inner lanceolate and acute; rays short, entire or 
slightly toothed (or sometimes none). Achenia of the disk cuneate-oblong, 
with a distinct wing extending half-way down the achenium on either side, 
* ACTINOMERIS, Nutt.—Heads heterogamous, radiate ; flowers of the ray neutral and in a single 
series ; disk-flowers hermaphrodite, fertile ; heads sometimes, by the deficiency of the rays, homogamous. 
Involucre hemispherical or campanulate; bracts 2-3-seried, unequal, short or the outer ones elongated 
and foliaceous. Receptacle convex or at length conical, covered with chaff, which embraces the disk- 
flowers. Ray-corollas ligulate, spreading, entire or 2-3-toothed ; disk-flowers regular, with ashort tube; 
limb elongated-cylindrical, 5-cleft at top. Anthers entire at base. Branches of the style in the disk- 
flowers terminated by acute appendages. Achenia laterally compressed, with margins attenuated and 
distinctly winged. Pappus usually of two persistent awns.—Scabrous herbs. Leaves opposite or 
alternate, petioled, sessile, or decurrent. Heads middle-sized, solitary, and with long peduncles or 
bose-paniculate.—BENTH. & Hook. 
