Aveust 16, 1906] MANUAL OF THE PHILIPPINE COMPOSITAE 135 
involueral bracts narrow and numerous, in 1 or 2 nearly 
equal series, or rarely imbricate in several unequal series; 
receptacle usually flat, not chaffy; style arms narrow, the 
appendages lanceolate; achenes compressed, usually pubes- 
cent; pappus of many nearly equal bristles. 
Species 150; all of which are endemic to North America, 
only the following species belong to South America and the old 
world generally. 
|. E. linifolius Willd. Sp. Pl. 3; 1955, 1764. Benth. Fl. 
Hongk. 176, 1861. Mart. in Nuov. Giorn. Bot. Ital. 15; 289, 1883. 
Forbes and Hemsl. in Journ. Linn. Soc. Bot. 23; 418, 1888. 
Hayata in Journ. Coll. Sci. Tokyo, 18; Art. 8, 14, 1904. Conyza 
ambigua DC. Prod. 5; 381, 1836.—4An erect annual, more or 
less clothed with soft hairs. Basal leaves petioled, oblong, 
coarsely toothed or almost pinnatifid; cauline ones sessile, 
linear entire; heads small, peduncled, hemispheric, forming 
an oblong panicle; bracts narrowly linear, acute, in 2 or 3 
subequal series; pistillate flowers very numerous, shorter than 
the pappus, filiform, at least the outer ones bearing a minute 
narrow ligule; achenes flat, pubescent; pappus rusty white. 
Very little known to us. Certain cosmopolitan species 
of Conyza are difficult to separate from this genus. 
DISTRIBUTION: 
Japan, China, and especially abundant in the Medi- 
terranean region. 
Luzon: 
Loher 3615, 3616 and 3617. 
VI. HELENIEAE. 
Herbs. Heads usually with fertile ligulate ray flowers. 
Braets of involuere herbaceous, mostly uniserial and equal, 
sometimes concave behind the ray achenes, but never enfold- 
ing them. Style arms of perfect flowers with either trunc- 
ate or appendiculate tips. Pappus mostly paleaceous or none. 
Pappus of 3 to 6 unequal scales. 
43. TAGETES. 
Pappus bristle like. 
44. POROPHYLLUM. 
