402 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
4 to 5 mm. long; pappus of 2 slender, strigose, easily deciduous awns 3 mm. long, or 
sometimes wanting. 
Type tocauity: Saltillo, Coahuila, Mexico. 
SPECIMENS EXAMINED: 
CoanuiLa: Saltillo, August, 1878, Parry & Palmer 462 (type collection; G, K), 
Shady arroyos and hill slopes, Saltillo, 1898, Palmer 795 (G, N). Limestone 
hills, Carneros Pass, 1889, Pringle 2392 (B,G, K). Without definite locality, 
1878, Parry 26 (G); in 1880, Palmer 589 (G, K). 
Like Flourensia resinosa, this apparently local species finds its closest ally in a 
species of South America, in this case F. suffrutescens, from which it differs in its 
smaller, densely prominulous-reticulate leaves. From all other Mexican species with 
radiate heads, F’. microphylla is at once distinguishable by its small leaves and usually 
subcanescent involucre. The awns of the pappus are often or usually deciduous at 
maturity, asin F. pringlei. 
11. Flourensia suffrutescens (R. E. Fries) Blake, Proc. Amer. Acad. 49: 376. 1913. 
Encelia suffrutescens R. E. Fries, Nov. Act. Soc. Sci. Upsal. IV. 1': 83. pl. 6, f. 1-3. 1903. 
Shrub, 20 to 30 cm. high, with decumbent-ascending branches about 30 cm. long; 
stem woody, thick, clothed with a grayish bark; branchlets fuscous, terete, rather 
densely spreading-pilose, the hairs with slightly enlarged glandular-tuberculate 
bases; leaf blades 2 to 4.2 cm. long, 8 to 12 mm. wide, narrowly elliptic or lanceolate 
to ovate, acute or subacuminate, mucronulate, at base cuneate to acuminate, entire, 
rigidly membranaceous, rather densely pilose on both sides with loose hairs slightly 
glandular-tuberculate at base, above bright green, beneath paler, obscurely tripli- 
nerved (the main veins about 4 pairs, obscurely distinguished from the intermediate 
veins), loosely prominulous-reticulate especially beneath; petioles pilose, 1 to 2.4 
mm. long; heads solitary at apex of branches, 3.5 cm. wide; peduncles 7 to 11 cm. 
long, bearing one or two leaves, rather densely spreading-pilose, the hairs with 
slightly glandular-tuberculate bases; disk 9 mm. high, 12 mm. thick; involucre 
2-seriate, equal, 12 to 13 mm. high, the phyllaries narrowly oblong-lanceolate or 
lanceolate, acuminate, herbaceous, not striate (at least when young), callous- 
mucronulate, loosely subcanescent-pilose outside, the hairs with slightly enlarged 
bases, within glabrous, 1-nerved; rays 12, linear-oblong or linear-elliptic, bidenticu- 
late or often deeply and unequally 2-lobed, gland-dotted but subglabrous on back, 
17 mm. long, 4 mm. wide; disk corollas glabrous, 5.2 mm. long (tube 1 mm.); pales 
gland-dotted and sparsely hispid-pilose at the blackish green, blunt or acutish, 
mucronulate apex, 9.5 mm. long; achene (very immature) densely silky-pilose, 
especially above, about 2.6 mm. long, the hairs at apex of achene simulating 
squamellae; awns 2, sometimes 3-cleft, unequal, slender, 3.5 mm. long or less; 
squamellae none. 
TyPk Locatity: Moreno, Province of Jujuy, Argentina. 
InLustrRATION: Nov. Act. Soc. Sci. Upsal. IV. 1!: pl. 6, f. 1-3. 
SPECIMENS EXAMINED: 
ARGENTINA: Rocky mountain slope, altitude 3,600 meters, Moreno, Province 
of Jujuy, December 16, 1901, Fries 926 (type collection; N). 
Unique among South American species in its subcanescently pilose involucre. 
12. Flourensia hirta Blake, sp. nov. 
Divergently branched shrub, the younger branchlets purple-brown, hirtous, 
resinous-granular, the older gray, glabrate; leaf blades 3.5 to 4.3 cm. long, 4.5 to 
9.5 mm. wide, narrowly lanceolate or linear-lanceolate, acuminate at each end, 
mucronate, entire, strongly prominulous-reticulate, scabrous-hirtous on both sides 
with ascending tuberculate-based hairs and more densely hirtous-ciliate; petioles 
scabrous-hirtous, 2 to 3 mm. long; heads 1 to 4 at apex of branches, 2 cm. wide, on 
