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BLAKE—REVISION OF FLOURENSIA. 399 
5. Flourensia glutinosa (Robins. & Greenm.) Blake, Proc. Amer. Acad. 49: 374. 
1913. 
Encelia glutinosa Robins. & Greenm. Amer. Journ. Sci. IIT. 50: 155. 1895. 
Shrub, 3 to 5 meters high, the bark gray, furrowed, the young branches more or less 
pilose-lanate with whitish hairs, the axis and branches of inflorescence resinous, 
pubescent, striate; leaf blades 6.5 to 9 cm. long, 1.8 to 3.8 cm. wide, ovate to ovate- 
lanceolate, acuminate, narrowed to the base, entire, mucronate, minutely scabrous 
above, scabrous-pubescent along the veins beneath, pale green, rather coarsely 
prominulous-reticulate (the prominent lateral veins 7 to 13 pairs); petioles lanate- 
pilose or merely pilosulous, 4 to 12 mm. long; heads about 2.5 cm. wide, 6 to 26 in 
cymose panicles at ends of branches, the 1 to 5-headed peduncles leafy-bracted at 
base, 2 to 5 cm. long, the bracts of inflorescence oval to ovate, 6 to 12 mm. long; disk 
very resinous, 1.4 to 1.8 cm. high, 9 to 11.5 mm. wide; involucre 3 or 4-seriate, strongly 
graduated, 5 to 6.5 mm. high, often calyculate with a few bractlets at apex of peduncle, 
the phyllaries lanceolate, obtusish, resinous, striate, fuscous, subherbaceous-tipped ; 
rays about 8, golden-yellow, oblong-oval, barely emarginate, glabrous but the tube 
pilose, 1.5 to 1.7 cm. long, 5 to 7 mm. wide; pales subcoriaceous, enlarged and crested 
with two scarious wings at apex, resin-encrusted, 11 mm. long; disk flowers yellow, 
blackish green on the teeth, slenderly funnelform, at apex resinous, 7 to 8 mm. long 
(tube 1.5 mm.); achenes narrowly cuneate, sometimes quadrangular, silky- pilose, 
6.5 to 11 mm. long; awns 2, or rarely 4, rather easily deciduous, 7 mm. long; squamellae 
none, or sometimes 2 or 3 present between each pair of main awns, and about half 
as long. 
Type LOCALITY: Las Hoyas Canyon, Oaxaca, Mexico. 
SPECIMENS EXAMINED: 
PurBta: Limestone hills, near Tehuacin, 1895, Pringle 7023 (G). 
Oaxaca: Las Hoyas Canyon, altitude 1,370 meters, November 2, 1894, Pringle 
6024 (type collection; B, G, K, N). About 9.6 kilometers above Domin- 
guillo, altitude 1,370 to 1,675 meters, 1894, Nelson 1832 (G. N). 
Flourensia glutinosa is readily distinguished by its many-headed cymose panicles 
and pilose-lanate branches. 
6. Flourensia collodes (Greenm.) Blake, Proc. Amer, Acad. 49: 373. 1913. 
Encelia collodes Greenm. Proc. Amer. Acad. 39: 110. 1803. 
Slightly resinous shrub; branches striate, angled, rather sparsely sordid-puberulous 
and resin-dotted; leaf blades 6 to 10 cm. long, 2.2 to 3.8 cm. wide, ovate, long-acuminate, 
falcate, at base inequilaterally rounded, firm but scarcely coriaceous, entire, puberu- 
lous on costa and main veins below, otherwise nearly glabrous, finely reticulate, only 
the chief veinlets prominulous, the 9 or 10 pairs of lateral veins prominent; petioles 
puberulous above, slender, 7 to 15 mm. long; heads in cymose panicles of 4 or 5 at 
ends of branches, terminal and axillary, 4 cm. wide, very resinous, on sparsely 
sordid-puberulous pedicels 8 cm. long or less, usually bracteate; disk 1.4 to 1.6 cm. 
high, 1.7 to 2 cm. thick; involucre 3-seriate, graduated, 1 cm. high, the phyllaries 
lance-ovate, acuminate to a glandular-callous tip, subherbaceous, thickened, striate, 
with narrow yellowish glandular-erose margin; receptacle flattish; rays about 14, 
narrowly elliptic, rarely bearing a short included style, 1.5 cm. long, 5 mm. wide; 
disk corollas 7 mm. long (tube 1 mm.), resinous; pales blunt, subcucullate at the 
fuscous apex, 12.5 mm. long; immature achenes pilose-ciliate, otherwise practically 
glabrous, 6 mm. long; awns 2, slender, 6 mm. long; squamellae 2 pairs, free from each 
other but united to awns at base, linear-lanceolate, attenuate, deeply and irregularly 
laciniate, 3 mm. long. 
TyrE Locatiry: Between Ocuilapa and Tuxtla, Chiapas, Mexico. 
SPECIMENS EXAMINED: 
Crrapas: Along road from Ocuilapa to Tuxtla, altitude 335 to 915 meters, August 
29, 1895, Nelson 3071 (type collection; G, N). 
