376 SPECIES BLANCOANAE 
Elephantopus serratus Blanco Fl. Filip. (1837) 635 (sp. noy.) ; ed. 2 (1845) 
442; ed. 3, 3 (1879) 23=ELEPHANTOPUS MOLLIs HBK. 
This Mexican weed was apparently an early introduction into 
the Philippines through the medium of the Acapulco-Manila 
galleons; it is now very common and widely distributed, occur- 
ring in waste places and in open grasslands from sea level to 
an altitude of at least 1,800 meters. Blanco’s description is 
very short and imperfect, but so far as it goes it applies to this 
species and to no other Philippine form known to me. 
Illustrative specimen from Antipolo, Rizal Province, Luzon, 
October, 1913 (Merrill: Species Blancoanae No. 323). 
Ageratum quadriflorum Blanco Fl. Filip. (1837) 624 (sp. nov.) =Elephan- 
topus ? dubius Blanco op. cit. ed. 2 (1845) 442 (nom. nov.); ed. 3, 3 
(1879) 28=ELEPHANTOPUS SPICATUS Aubl. 
This is one of the most widely distributed weeds in the Phil- 
ippines. It was introduced from Mexico into Guam, in the 
Marianne Islands, and into the Philippines at an early date 
through the medium of the Acapulco-Manila galleons. 
Illustrative specimen from Manila, Luzon, December, 1913 
(Merrill: Species Blaneoanae No. 363). 
ADENOSTEMMA Forster 
Adenostemma viscosum Forst.; Llanos Frag. Pl. Filip. (1851) 90; F.-Vill. 
& Naves in Blanco Fl. Filip. ed. 3, 4" (1880) 70=ADENOSTEMMA 
LAVENIA (Linn.) O. Kuntze. 
Forster’s species was correctly interpreted by Llanos, but the 
Linnean specific name is older. It is widely distributed in the 
Philippines, extending from sea level to an altitude of at least 
2,000 meters. 
Illustrative specimen from Calumpit, Bulacan Province, Luzon, 
January, 1915 (Merrill: Species Blancoanae No. 696). 
EUPATORIUM Linnaeus 
Eupatorium ayapana Vent.; Blanco Fl. Filip. (1837) 619; ed. 2 (1845) 432; 
ed. 3, 3 (1879) 9=EUPATORIUM TRIPLINERVE Vahl Symb. Bot. 
_ 3 (1794) 97. : ae 
This Mexican species was introduced into the Philippines by 
the Spaniards for medicinal purposes and still persists in cul- 
tivation, although very rare at the present time. It is locally 
known as ayapana, the name introduced with the plant. Blanco 
states that it flowers in January, but I have never seen it in 
flower. 3 
Illustrative specimen from cultivated plants, Manila, Luzon, A 
October, 1914 (Merrill: Species Blancoanae No. 517). 
