270 NORTH AMERICAN FLORA [VoLuME 34 
63. Artemisia sulcata Rydberg, sp. nov. 
A perennial, with a rootstock; stem 5 dm. high or more, glabrous or nearly so, strongly 
grooved, yellowish-green; leaves 5-10 cm. long, green and glabrate above, white-tomentose 
beneath, the lower pinnately divided into narrowly lance-linear lobes, the upper entire and 
lance-linear; inflorescence paniculate; branches elongate and raceme-like; involucre broadly 
campanulate, 3 mm. high and fully as broad, slightly tomentose when young, soon glabrate, 
shining and yellowish; bracts about 10, in 3 series, broadly oval, obtuse; ray-flowers 6 or 7; 
corollas 1 mm. long; disk-flowers 12-15; corollas yellow, 2 mm. long, funnelform; achenes 1 
mim. long. 
Type collected at Casas Grandes, Chihuahua, August 30, 1899, Townsend & Barber 437 (herb. 
N. Y. Bot. Gard.). 
DISTRIBUTION: New Mexico to San Luis Potosi, Durango, and Arizona. 
64. Artemisia Lindheimeriana Scheele, Linnaea 22: 163. 1849. 
Artemisia vulgaris americana Besser, Linnaea 15: 105, in part. 1841. 
Artemisia cunetfolia Scheele, Linnaea 22: 162. 1849. Not A. cuneifolia DC. 1837. 
A perennial herb, with a rootstock; stem 3-10 dm. high, striate, sparingly floccose or in 
age glabrous, branched; lower leaves pinnatifid, with narrow linear divisions, 4-5 cm. long, 
slightly floccose but soon glabrate and green above, white-tomentose beneath; upper stem- 
leaves entire, narrowly linear-lanceolate, those of the branches narrowly linear; heads very 
numerous in a branching panicle, mostly nodding; involucre campanulate, 3 mm. high, 2 mm. 
broad; bracts 10-12, in about 3 series, usually densely tomentose, the outer ovate and half 
as long as the innermost; inner bracts elliptic, obtuse; ray-flowers 5-7; corollas cylindric, 
1.5 mm. long; disk-flowers 6-10; corollas yellow, 2 mm. long; achenes 1 mm. long. (Inter- 
mediate between A. ludoviciana and A. mexicana.) 
TypEe LocaLity: In the dry river bed of the Cibolo, fifteen miles west of New Braunfels, Texas. 
DISTRIBUTION: Missouri and Oklahoma to Texas. 
ILLUSTRATION: Britt. & Brown, Ill. Fl. ed. 2. f. 4589 (as A. mexicana). 
65. Artemisia mexicana Willd.; Spreng. Syst. 3: 490. 1826. 
Oligosporus mexicanus Less. Syn. Comp. 264. 1832. 
Artemisia indica mexicana Besser, Nouv. Mém. Soc. Nat. Mosc. 3: 56. 1834. 
Artemisia vulgaris mexicana ‘T. & G. Fl. N. Am. 2: 421. 1843. 
A perennial, with a rootstock; stem 3-10 dm. high, more or less floccose, at least when 
young, striate; leaves numerous, 5-10 cm. long, loosely floccose when young, but soon glabrate 
and green above, densely white-tomentose beneath, those of the stem ternately divided, or 
the lower sometimes pinnately 5-divided, into linear attenuate almost equally long divisions 
2-4 mm. wide; heads numerous in a rather dense panicle, mostly nodding; involucre hemi- 
spheric, about 3 mm. high and as broad; bracts about 10, straw-colored, sparingly arachnoid- 
tomentose, in about 3 series, the outermost ovate, acute, half as long as the innermost; inner 
bracts oval, obtuse, broadly scarious-margined; ray-flowers 8-10; corollas 1.5 mm. long; 
disk-flowers 10-15; corollas and achenes as in the preceding. $ 
TYPE LOCALITY: Mexico. 
DISTRIBUTION: Texas and New Mexico to San Luis Potosi and Jalisco. 
66. Artemisia Muelleri Rydberg, sp. nov. 
Artemisia mexicana latifolia Schultz-Bip. in herb. 
A tall perennial, with a rootstock; stem about 1 m. high, finely tomentose-striate; leaves 
alternate, sessile, linear-lanceolate, 5-10 cm. long, 5—15 mm. wide, usually entire, rarely with 
a few narrow lobes, loosely floccose and glabrate above, densely white-tomentose beneath; 
heads numerous in a leafy panicle, nodding; involucre hemispheric or turbinate, 3 mm. high 
and broad; bracts 10-12, in about 3 series, arachnoid-tomentose, the outer ovate, half as long 
as the innermost; inner bracts elliptic, obtuse; ray-flowers 10-12; corollas 1.5 mm. long; disk- 
flowers 5-8; corollas 2 mm. long; achenes about 1 mm. long. 
a 2 has collected at Orizaba, 1853, Fred. Mueller 1868 [field no.] or 235 [distrib. no.] (herb. N. Y. Bot. 
ard.). 
DISTRIBUTION: Vera Cruz to Hidalgo and Jalisco. 
