. 
188 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
the leaf ciliate; leaves with coarse, shallow, rather obtuse teeth; upper leaves 
oblong-obovate or narrowly oval, sessile, often by clasping bases, serrate, obtuse, 
obscurely puberulent or glabrous; heads solitary at the ends of the branches, 
15 mm. broad and 12 mm. high, with numerous narrow, violet rays 2 em. long; 
bracts linear, acute or acuminate, some of them with subulate tips, green for 
two-thirds their length, puberulent, only slightly glandular, the tips spreading, 
the lowest bracts reflexed; achenes straw-colored, glabrous. 
Type in the U. 8S. National Herbarium, no. 562446, collected high up in Fil- 
more Canyon of the Organ Mountains, September 28, 1906, by E. O, Wooton and 
Paul GC. Standley. 
ADDITIONAL SPECIMENS EXAMINED: Filmore Canyon, October 23, 1904, October 
29, 1904, Wooton; Old Tiptop, Organ Mountains, October 18, 1908, Metcalfe. 
A very handsome plant with large heads and showy, bright-colored rays. It 
is related to M. asteroides, but the leaves are very different, likewise the 
pubescence. 
Machaeranthera angustifolia Wooton & Standley, sp. nov. 
Stems reddish, slender, erect, 80 cm. high or less, simple below, corymbosely 
branched above, cinereous; leaves linear-oblong to linear-oblanceolate, entire, 
densely scabrous, especially beneath, 1-nerved, acute, sessile by slightly nar- 
rowed bases, the uppermost leaves reduced: beads few, hemispheric, 15 mm. 
wide and 10 mm. high or smaller, with numerous bluish-purple rays; bracts 
unequal, thick, green above for half their length or more, linear-subulate, their 
tips squarrose, rather densely glandular near the tips; achenes almost or quite 
glabrous. 
Type in the U. S. National Herbarium, no. 45774, collected in New Mexico, 
probably in the Sandia Mountains, in 1853, by J. M. Bigelow. Another sheet 
of the same collection, which we have examined, is in the Gray Herbarium. 
ADDITIONAL SPECIMENS EXAMINED: Bear Canyon, Sandia Mountains, Septem- 
ber 24, 1897, Herrick; Dulce, alt. 2,200 meters, 1911, Standley 8124; Pecos, 1904, 
Bartlett 105; north of Glorie‘a, alt. 2.220 meters, 1908, Standley 5217, 5265; 
Tunitcha Mountains, 1911, Standley 7765, 7620. 
Machaeranthera aquifolia Greene, sp. nov. in herb. 
Stems very slender, erect, 80 cm. high or less, sparingly branched near the 
base, the branches simple up to the loosely paniculate inflorescence, sparingly 
scabrous, abundantly glandular; leaves linear-oblong, acute or nearly obtuse, 
thin, sparingly spinulose-dentate, sessile by scarcely narrowed bases, somewhat 
scabrous, bright green, the uppermost reduced; heads few, hemispheric, 14 mm. 
broad and 10 mm. high or smaller; bracts very unequal, green for half their 
length, with spreading tips, linear-subulate, the outermost reflexed, finely 
glandular-puberulent; achenes scaberulous. 
Type in the U. 8. National Herbarium, no. 495763, collected at the Gila Hot 
Springs in the Mogollon Mountains, Socorro County, August 26, 1908, by O. B. 
Metcalfe (no. 856). Altitude 1,950 meters. 
ADDITIONAL SPECIMENS EXAMINED: Hop Canyon, 1895, Herrick 628; Magda- 
lena Mountains, 1895, Zerrick 616; Grand Canyon of the Gila, August 19, 1900, 
Wooton; Mangas Springs, alt. 1,430 meters, 1903, Metcalfe 715; East Canyon, 
1911, Holzinger; Gilmores Ranch, July 25, 1901, Wooton. 
The plant occurs in Arizona as well. The specimens from the Magdalena 
Mountains are stouter and have more heads than the typical form. 
Machaeranthera centaureoides Greene, sp. nov. in herb. 
Stems 70 cm. high or less, stout, green, simple below, corymbosely branched 
above, the branches ascending, glabrous below, rather densely scabrous and 
