BLAKE—NEW PLANTS FROM VENEZUELA, 539 
This species, the first member of the genus to be found in South America, 
may be easily distinguished from its nearest relative, O. verbesinoides Benth. 
of Central America, by its very much smaller heads. 
EXPLANATION OF PLATE 45.—Otopappus australis, from the type specimen, Natural 
slze. 
Oyedaea jahnii Blake, sp. nov. PLATE 46. 
Herbaceous above, doubtless shrubby below, erect-branched; stem stout, 
densely hispidulous or short-hirsute with incurved-ascending hairs with brown- 
ish tuberculate bases, glabrate below and densely maculate with the brownish 
persistent extreme bases of the hairs; leaves opposite; petioles stout, 5 to 10 
inm. long, 2 to 4 mm. wide, marginate (especially in the upper leaves), densely 
strigose and accumbent-hirsute and ciliate; blades ovate or lance-ovate, or the 
uppermost lanceolate, 6.5 to 10.5 em, long, 1.3 to 3.5 cm. wide, acuminate, cuneate 
or rounded-cuneate at base and decurrent on the petiole, serrulate (teeth about 
§ to 10 pairs, 4 to 7 mm. apart), firmly pergamentaceous, above deep green, 
somewhat lucid, harshly and rather sparsely short-hispid with incurved hairs 
with persistent lepidote-tuberculate bases, along the chief veins densely hispid- 
pilose, beneath brownish green, evenly but rather sparsely hispidulous on sur- 
face with incurved subtuberculate-based hairs, along the larger veins densely 
hispidulous-pilosulous with several-celled subglandular brownish hairs and less 
densely hispid-pilose with antrorse eglandular hairs, triplinerved about 1 cm. 
above the base, prominulous-reticulate beneath; heads about 3.5 cm. wide, 
solitary at tips of branches on peduncles 3 to 4.5 cm. long and pubescent like 
the stem; disk 1 to 1.4 em. high, 1.5 to 2.2 cm. thick; involucre 3-seriate, sub- 
equal or obgraduate, 11 to 12 mm. high, the 2 outermost series of phyllaries 
subequal, oblong-lanceolate, acute or subacuminate, erect or somewhat loose, 
with blackish green, indurate, usually subglabrous base (4 min. long or less, 
3 to 3.5 mm. wide) and much longer herbaceous tip, rather sparsely hispid- 
pilose and sordidly pilosulous with several-celled subglandular hairs, densely 
hispid-pilose-ciliate ; innermost series of phyllaries usually shorter, oblong, the 
base subglabrous, indurate, the tip much shorter, usually deltoid, acute, densely 
hispidulous and _ sordid-pilosulous, hispid-pilose-ciliate, subherbaceous; rays 
about 10, golden yellow, oval, about 17 mm. long, 6.5 mm. wide, bearing an 
abortive undivided style; disk corollas yellow, glabrous except for the hispidu- 
lous teeth, 7.2 mm. long (tube 2.5 mm., throat slender-funnelform, 4 mm., teeth 
deltoid-ovate, 0.7 mm.) ; pales narrow, carinate, acute, 8.5 mm. long, glabrous 
on the sides, hirsute-pilose on keel, spinulose-ciliolate, toward apex densely 
pilosulous-ciliate with several-celled hairs; achenes (very immature) glabrous 
laterally, hispid-pilose-ciliate on margins; pappus of 4 or 5 (sometimes only 
#7) slender unequal hispidulous fragile awns 4.5 mm. long or less, and a 
corona of about 12 unequal lacerate squamellae, connate below, 1 mm. long or 
legs. 
Type in the U. S. National Herbarium, no. 1,069,163, collected on the Piramo 
de Canagua, Mérida, Venezuela, altitude 2,400 meters, January 21, 1922, by 
Alfredo Jahn (no. 911). 
This species is nearest the Colombian Oyedaea reticulata Blake, but is dis- 
tinct in its longer involucre of narrower phyllaries with much longer herba- 
ceous tips, and its solitary heads. From 0. verbesinoides DC., which it some- 
what approaches in character of involucre, it is readily distinguished by its 
solitary heads and smaller leaves, which are sparsely and much more harshly 
pubescent beneath and not at all canescent. Oyedaea jahnti is the first species 
of the genus in which abortive styles have been found in the ray flowers. 
In its usually if not always 4 or 5-aristate pappus it is approached only by 
