350 DESCRIPTIONS OF NEW SPECIES 



scape hifoliate; capitulum large, subglobose, imbricated in about four series, 

 lanuginous at base; sepals lanceolate, acute, ciliate; root clad with 3)ersistent 

 fibres. 



Hab. Dry plains east of Walla-Walla, near the Blue Mountains, and in the Grand Ronde prai- 

 rie. Nearly allied to the preceding, but with a very different pubescence ; also a more robust and 

 dwarf plant, with a much larger capitulum. I have not seen it in flower, only in seed. Leaves 

 about a foot long, two to three inches wide, very lanuginous at the base of the petiole, which is very 

 flat. Sepals nearly all equal, closely imbricated. Florets of the ray very numerous. Stigmas 

 long and hirsute. Leaves green, not at all canescent and soft, as in the preceding. 



Balsamorhiza * incana; canescentlj tomentose ; scape scarcely longer than 

 the leaves, bifoliate at base; leaves deeply pinnatifid; segments oblong or ovate, 

 entire or denticulate externally ; involucrum densely tomentose, bi or triseriate. 



Hab. In the Rocky Mountains. About six to eight inches high. A beautiful and very showy 

 species, with flowers as large as Inula Helenium, of a deep yellow, the whole herbage white 

 with soft down. The leaflets oblique, often bilobed. Rays twelve to fourteen^ with infertile fila- 

 ments, as in the preceding species. Scales of the receptacle very short. Stigmas hirsute, filiform, 

 and exserted. 



Balsamorhiza * macrophylla; smooth; scape about the length of the leaves, 

 bifoliate at base; leaves deeply pinnatifid, confluent above; segments sublan- 

 ceolate, acute, entire, or with one or two large teeth at base; involucrum about 

 triserial ; sepals lanceolate, the lower ones leafy and reflected ; paleee nearly 

 equal in length with the florets. 



Hab. Towards the sources of the Colorado of the west, in the Rocky Mountains ; rare. Re- 

 markable for its large, smooth leaves, scabrous on the margin, and scattered with glandular atoms. 

 Petioles very long, with the leaf near a foot in length, segments three inches long, half to three- 

 fourths of an inch wide. 



^ II. *Artorhiza. — Leaves entire, deltoid or cordate; involucrum very leafy at 



l)ase; rays numerous. Receptacle Jiat. 



Balsamorhiza sagittata. Buphthalmum sagittatum? Pursh., Vol. II., p. 564. 

 Espeletia sagittata; Nutt, in Journ. Acad. Nat. Sci. Philad., Vol. VIL, p. 39. 

 Canescently tomentose ; stem low, about one to three-flowered ; radical leaves 

 cordate-ovate, entire, somewhat three-nerved at base; cauline leaves linear, at- 

 tenuated below; external leaves of the involucrum longer than the inner, spread- 

 ing, lanceolate, densely tomentose; rays numerous, (twenty to twenty-four.) 



Hab. In the Rocky Mountains, by Flat-Head River, towards the sources of the Oregon.. 



