30*2 COMPOSITiE. Balsamorhiza. 



Buphthalmum sagittatum, Pursh, fl. 2. p. 564, ex Nutt. Espeletia sagittata, 



Nutt.! in jour. acad. Philad. 7. p. 38, t. 4. 



In the Roclv3' Mountains by Flat-Head River, &c., Lewis, Mr. Wyeth ! 

 — Head laroe and showy, 3 to 4 inches in diameter, while the scapoid stem 

 is not more than a span high. ±^ult. 



6. B. helianthoides (Nutt.! I.e.): leaves densely tomentose-canescent ; 

 the radical on very long petioles, oblong, cordate-hastate, entire, acutish, the 

 cauline lanceolate; scales of the tomentose involucre lanceolate, acuminate, 

 appressed ; rays about 15. — Espeletia helianthoides, jSutl. ! in jour acad. 

 Philad. I. c. 



Rocky Mountains, with the preceding, {Mr. Wyeth !) to which it is very 

 similar; but differs, according to Mr. Nuttall, in having a smaller and more 

 imbricated involucre, &c. We should have taken this species for the Buph- 

 thalmum sagittatum of Pursh, except that that author states that the ex- 

 terior scales of the involucre are longer than the disk. 



7. B. deltoidea {l^nXt.l I.e.): hirsute-pubescent; radical leaves on very 

 long petioles, deltoid-cordate, acute, with undulate or crenate margins ; the 

 cauline 1-3, small, ovate or spatulate ; involucre woolly or tomentose at the 

 base ; the scales in about 2 series ; the exterior largest, linear-lanceolate, 

 foliaceous, spreading, longer than the disk ; raj's 12-20. 



Oregon, at Fort Vancouver, Dr. Scouler ! and in wet open places on the 

 Wahlamet, Nuttall ! June. — Scapes a foot or more in height. Rays about 

 an inch long. 



87. HELIOPSIS. Pers. syii. 2. p. 473 ; DC. inodr. 5. p. 550, excl. § 3. 



Heads many-flowered; the ray-flowers (10 or more) pistillate, in a single 

 series; those of the disk tubular, perfect. Scales of the involucre in 2-3 

 series; the exterior foliaceous and somewhat spreading; the interior shorter 

 than the disk. Receptacle conical ; the lanceolate or Hnear chaff somewhat 

 embracing the achenia. Branches of the style in the disk-flowers hairy to- 

 wards the apex, which is obtuse and tipped with a mucronate appendage. 

 Achenia glabrous, quadrangular, or in the ray 3-sided and convex externally. 

 Pappus none, or rather an obsolete truncate crown. — Perennial (American) 

 herbs, with rather large lieads on long peduncles, terminating the stem or 

 branches. Leaves opposite, petioled, triplinerved, serrate. Flowers 

 yellow. 



§ 1. Rays articulated toith the ovary, and at length deciduous: achenia 

 smooth. — EuHELiopsis, DC 



1. H. leevis (Pers.): nearly smooth and glabrous; leaves ovate-lanceo- 

 late or oblong-ovate, somewhat truncate at the base, or abruptly tapering 

 into the petiole, coarsely serrate.— Pwr-s/?/ fl. 2. p. 563; Ell. sk. 2. p. 407; 

 Darlinu-t.! fl. Cest. p. Al^ ; Dunal! in mem. mus. 5. 2^' 55; Hook. hot. 

 ma"-, t. 3372 ; DC! I. c. Buphthalmum helianthoides, Linn. ! hort. Ups., 

 Sf spec. 2. p. 904: Michx.! fl. 2. p. 130 ; VHer. stirp. t. 45 ; Schkuhr, 

 handb. t. 257. Silphium helianthoides, Linn..' sjJec. 2. p. 920, ex syn. 

 Gronov. Rudbeckia oppositifolia, [Gronov.) Linn.! I. c. Helianthus laevis, 

 Linn.! spec. ed. 2., excl. syn. Gronov. Helepta parviflora, H. grandiflora, 

 &c., Eaf.! neog. 



