COCKERELL: NorRTH AMERICAN SPECIES OF HyMENoxys 497 
once suggests the appearance of the plant, especially the flowers.* 
The pappus-scales are ordinarily dark ferruginous, but in Wooton’s 
plant from mountains north of Santa Rita, they vary from white 
to ferruginous in the same head. The disc-coroilas have the up- 
per part broad, but not at all suddenly expanded at the top as in 
the odorata series. The upper hairs of the achenes and flattened ; 
some are bifid at the tips. There is no woolliness at the base of 
the plant. 
I have examined Rusby’s 276, from grassy hills, Clairmont, 
N. M., and also Rusby’s 246 4 (three sheets) from grassy places, 
Mogollon Mts., N. M., August, 1881. More recent specimens 
are Wooton’s from mountains north of Santa Rita, S. E. of Mo- 
gollon Mts., Socorro Co., N. M., 6,000 ft., August, 23, 1900, 
and Devil’s Park, Mogollon Mts., August 9, 1900. Another 
plant collected by Professor Wooton is from Lower Plaza, Frisco, 
N. W. of Mogollon Mts., Socorro Co., N. M., alt. approx. 6,000 
ft., July 25, 1900. 
Some small slender plants with few heads, the basal leaves 
wanting, were collected by Dr. MacDougal, August 1, 1891, in 
dry soil, Rattlesnake Tanks, east of Flagstaff, Arizona. The 
heads, pappus, &c., are exactly those of 7. Ruséyz, and I cannot 
do otherwise than refer them to that species. Whether they are 
merely starved specimens, or represent a race (as one might ex- 
pect from the locality) I cannot now say. 
“Hymenoxys olivacea sp. nov. 
; Apparently perennial : well-developed plants nearly 30 cm 
high, but some only 10 cm.: foliage a dark olive green, the leaves 
glabrous and strongly glandular-punctate, linear, but the stem- 
leaves up to 2. 5 mm. broad, both the basal and stem-leaves entire, 
Or some of the upper stem-leaves with linear lateral lobes ; basal 
leaves 6 to 10 cm. long, similar in character to those of 7. Ruséyi: 
heads (excluding rays) 8 to 10 mm. broad, not very numerous, on 
ong peduncles; rays ordinary, broad, pale orange ; outer bracts 
_ united to or beyond the middle, thickened dorsally, pale in color ; 
ner bracts as usual in the group, strongly fimbriate ; receptacle 
elevated, rounded, somewhat higher than broad: achenes densely 
Covered with pale to deep ferruginous hair ; pappus-scales pale or 
* Dr. Greene well defines it as ‘‘a large green and glabrous corymbose-panicled 
Species,’’ 
