BLAKE—REVISION OF FLOURENSIA. 395 
KEY TO SPECIES. 
Heads discoid. 
Leaves entire. 
Leaves ovate to obovate, 2 to 6 cm. wide. ............ Leceeeee 1. F. laurifolia. 
Leaves 4 to 11.5 mm. wide. 
Leaves narrowly lanceolate, 4 to 7.5 mm. wide........... 2. F.retinophylla 
Leaves ovate to oval, 6.5 to 11.5 mm. wide...............----- 3. F. cernua. 
Leaves mucronate-dentate, rhombic-ovate.............---------- 4. F. ilicifolia. 
Heads radiate. 
Young branches densely pilose-lanate; heads numerous, in regular cymose 
panicles............2222 22222 eee eee eee eee 5. F. glutinosa. 
Young branches not pilose-lanate; heads solitary to several at tips of branches, not 
regularly cymose-paniculate. 
Petioles mostly 1 to 1.5 cm. long; leaves with the secondary veinlets not prominu- 
lous-reticulate beneath..............---02 222-22 eee eee eee 6. F. collodes. 
Petioles much shorter, or else leaves with the secondary veinlets prominulous- 
reticulate. 
Phyllaries 13 to 23 mm, long, with ovate or lanceolate base and elongate linear- 
attenuate tip............. 00-222 e eee eee eee eee eees 7. F. pringlei. 
Phyllaries 4 to 15 mm. long, or if longer without linear-attenuate tip. 
Leaves narrowly oblong-elliptic to lanceolate, very glutinous, strictly entire, 
thick, mainly 5 to 13 cm. long. Heads 1 to 4, axillary and terminal, 
3.5 to 5.3 cm. wide, on peduncles 3 to 8 cm. long. 
Phyllaries narrowly lanceolate; leaves 3.3 to 6.5cm. long. 8. F. resinosa. 
Phyllaries (at least the inner) with broad rhombic-obovate base and 
lanceolate tip; leaves 7.5 to 13 cm. long.....-..-- 9. F. heterolepis. 
Leaves usually oval, ovate, or broadly elliptic, rarely lanceolate, not strongly 
glutinous. 
Involucre (at least in youth) densely and usually subcanescently pilose or 
hispid-pilose. 
Leaves densely and finely prominulous-reticulate, 1.5 to 2.5 cm. 
long......---- 220-22 e eee eee eee eters 10. F. microphylla. 
Leaves loosely reticulate, 2 to 4.2 cm. long...... 11. F. suffrutescens. 
Involucre green, subglabrous or sparsely pubescent chiefly on the margin 
of the phyllaries. 
Leaves narrowly lanceolate, hispid-hirtous especially on margin, 4.5 to 
9.5 mm. wide; branchlets hirtous..........--------- 12. F.hirta. 
Leaves usually ovate, oval, or elliptic, mostly more than 1 cm. wide, 
not hispid-hirtous; branchlets not hirtous. 
Leaves usually entire, when regularly denticulate narrowly oblong- 
lanceolate to lanceolate. 
Leaves mostly ovate or oval or, if narrowly lanceolate, strictly 
entire. 
Leaves entire (except in F. leptopoda); involucre 4 to 11 mm, 
high, the phyllaries not lance-spatulate. 
Leaves not rhombic-ovate, entire or rarely with a few irregular 
teeth; petioles less than one-third as long as blade. 
Phyllaries narrow, linear to lanceolate, rarely with slightly 
dilated ovate-lanceolate bases. 
Leaves 1.5 to 5 cm. long, 4 to 18 mm. wide. 
Leaves strongly prominulous-reticulate. 13. F. fiebrigii. 
Leaves not prominulous-reticulate. 
Phyllaries narrowly lanceolate, not widened at base; 
leaves narrowly oblong or elliptic, 0.4 to 1 cm. 
wide........-----0- eee eee eens 14. F. polyclada. 
