
34 Contributions from the Gray Herbarium 
ated downward, capping the apex of the achene; pappus none. 
Texas to Mexico; species 43-46. P. 95. 
Ser. E. Brevirouiar. Low much-branched shrubs, canescent 
with a fine appressed pubescence; leaves small, ovate, canescent at 3 
least beneath; heads solitary at tips of stem and branches; involucre 
3-4-seriate, the phyllaries ovate or oblong-ovate, acute, strigillose, — 
obscurely costate, the herbaceous apex very short and obscure; 
pappus present or absent. Mexico; species 47-49. P. 99. _ 
Sect. 3. DreLosticnis. Annuals or rarely shrubs, of slender habit; 
leaves ovate or lanceolate; heads small, few or panicled; involucre 
2-seriate, the phyllaries with more or less indurated and ribbed base 
and short subherbaceous apex, or rarely subherbaceous nearly through- 
out; achene usually with distinct carpopod; pappus rarely wanting. 
Mexico to Venezuela and Ecuador; species 50-57. P. 101. . 
Sect. 4. Heriomeris. Slender annuals or perennials, with mostly 
lanceolate or linear leaves and small panicled heads; involuere 2- 
seriate, scarcely graduated, the lanceolate or linear-lanceolate (in one. 
species ovate) phyllaries herbaceous throughout, sometimes vittate — 
but not ribbed; pappus none. Montana to Chiapas; @ single 
species also in Georgia; species 58-64. P. 108. a 
Sect. 5. Paraposa. Herbs or shrubs of exceedingly varied habit; 
involucre 2~5-seriate, the phyllaries usually lanceolate or lance- 
oblong, below more or less indurated and costate, above herbaceous; 
pappus always present. Ecuador to Argentina and Brazil; species — 
65-127. P. 116. : 
Ser. A. Tenvuirouian. Slender simple perennials, with rather 
few linear or linear-filiform leaves and solitary heads; involucre 2 
seriate, the phyllaries subequal, lanceolate or oblong, herbaceous, — 
scarcely indurated at base. Brazil; species 65-68. P. 116. : 
Ser. B. Revouurar. Shrubs or herbaceous perennials, wilh 
alternate entire lanceolate or lance-oblong leaves and rather large heads 
_ solitary at apex of stem and branches; involucre 3-5-seriate, : 
ated, the phyllaries lanceolate, slightly indurated at base. Chile 
adjacent Argentina; species 69-71. P. 119. 
pein 














(sometimes scale-like), opposite, the wpper much larger and : 
involucre 2—4-seriate, scarcely graduated, the phyllaries lan 
