BLAKE—REVISION OF OYEDAEA. 413 
Involucre 4 to 9.5 mm. high, the phyllaries with indurate base and shorter, 
usually deltoid, mostly reflexed apex. 
Leaves feather-veined or sometimes obscurely triplinerved. 
Outer phyllaries linear-lanceolate; leaves lanceolate or ovate-lanceolate, 
obscurely reticulate beneath ........-...---+++-+- 2. O. scaberrima. 
Outer phyllaries ovate-lanceolate to ovate; leaves strongly reticulate be- 
neath. 
Leaves rather densely hispid-pilose or pilosulous between the veins on 
lower surface. 
Leaves hispid-pilose beneath; involucre 5.5 to 8 mm. high, the 
phyllaries acute, scarcely reflexed. 
Leaves oblong-ovate to ovate, obscurely serrulate, rounded at base. 
3. O. wedelioides. 
Leaves lance-ovate, distinctly serrulate, cuneate at base. 
4. O. reticulata. 
Leaves hispidulous-pilosulous beneath; involucre 4 to 5 mm. high, 
the phyllaries acutish or obtusish, with strongly reflexed tips. 
5. O. rusbyi. 
Leaves hispidulous beneath, lanceolate or ovate-lanceolate. Involucre, 
4.8 to 6 mm. high, the phyllaries mostly with obtuse reflexed tips. 
6. O. lanceolata. 
Leaves distinctly triplinerved .........-....-.---+eeeeeeee 7. O. boliviana. 
Invyolucre 11 to 16 mm. high, the phyllaries with short indurate base and longer, 
lanceolate to ovate, loose, herbaceous tip.......-.-- 8. O. verbesinoides. 
Plants herbaceous. 
Leaves linear.............00 2 ee eee cere eee eee eee teen eeeeee 9. O. bahiensis. 
Leaves oblong to ovate. 
Head solitary; leaves 1.5 to 3.5 cm. long.-........-..- 10. O. humboldtiana. 
Heads several; leaves7.5 to 9 cm. long......----------- 11. O. trachyphyla. 
Phyllaries ovate to oval,indurate, without distinct herbaceous tips.12. O. ovalifolia. 
1. Oyedaea buphthalmoides DC. Prodr. 5: 577. 1836. 
Shrub; stem terete, brown, striate, densely hispid-pilose with loose curly hairs 
with scarcely enlarged bases, subcanescent above; branches erect, 3 to 18-headed 
at apex; leaf blades 7.5 to 13 cm. long, 2 to 5.3 cm. wide, ovate or ovate-lanceolate, 
acuminate, cuneate at base, crenate-serrate with 17 to 27 pairs of mucronate teeth, 
triplinerved 1 to 3 cm. above the base, above dark green, pubescent with incurved, 
rather soft, long and short hairs with scarcely enlarged bases, or tuberculate-hispid 
with short incurved hairs, beneath densely grayish-tomentulose or pilosulous, the 
veins brownish; petioles rather softly hispid-pilose, 1 to 1.3 cm. long; pedicels 2.4 
to 7 cm. long, canescently hispid-pilose; heads 2.9 to 3.8 cm. wide; disk 8 to 10 mm. 
high, 11 to 16 mm. wide; involucre 3 to 4-seriate, graduated, 9 to 11 mm. high; outer- 
most phyllaries 3 or 4, oblong to oval-oblong or obovate-oval, acutish to obtuse, her- 
baceous, in age strongly indurate and subcoriaceous below, spreading at apex, rather 
soitly hispid-pilose with ascending hairs, and ciliate (6.5 to 7.5 by 2 to 3.5 mm.); 
the next series about 4, oval-oblong or obovate-oval, with somewhat indurate base 
and narrow scarious margin, herbaceous above, obtusish; the innermost in fruit 
somewhat elongate, exceeding disk, membranous-chartaceous above, strigillose or 
subglabrate on back, pilose-ciliate, 4.3 to 6 mm. wide toward the rounded, slightly 
broadened tip; rays 8 or more (?), oblong, 1.1 to 1.9 cm. long, 3 to 5.5 mm. wide; 
disk corollas glabrous except on teeth, 6 to 6.5 mm. long (tube 2 to 2.5 mm.); pales 
narrow, acute, appressed-denticulate toward apex, about 1 cm. long; achenes blackish 
or mottled, oblong, winged, sparsely appressed-pubescent, 4.5 to 6.5 mm. long, 1 to 2 
mm. wide; awns 2, spinulose-ciliolate, unequal, 2.5 to 4.5 mm. long; squamellae 
