88 LEAFLETS OF PHILIPPINE BOTANY [Vor. I, AnT.7 
arms subulate; achenes obtuse, 8 to 10-ribbed; pappus short, 
scabrid, fugacious. 
Species about 13; mostly of tropical Asia, one in Aus- 
tralia and a few in tropical America. 
1. C. fruticosum Vid. Rev. Pl. Vasc. Filip. 159, 1886. 
Ceron Cat. Pl. Herb. 100, 1892.—An erect suffrutescent plant 1 
m. high, with striate puberulent branches, subsessile rhomboid 
to obovate oblong leaves. The heads long pedunculate, solitary, 
about 2 em. in diameter. Leaves acute at both ends, about 2 cm. 
long, 1 cm. wide, serrate or crenately dentate, yellowish or ashy 
tomentose beneath. Flowers blue; the external bracts foliaceo- 
us, longer than the head, the inner scarious; corolla about 
1 em. long; achenes 2.5 mm. long, oblong, the ribs brown, 
not prominent; pappus bristles about equaling the achene. 
Bentham Fl. Austr. 3; 460, 1886 in a note following Cen- 
tratherum muticum Less. states. “We have apparently the 
same from the Philippine Islands”, but cites no specimens. 
Undoubtedly he based this statement on Cuming 1556 which 
number is enumerated by Vidal Phan. Cuming Filip. 121, 
1885 as an undetermined species of Centratherum. Probably 
Cuming’s plant is identical with Vidal’s species which may 
prove only a form of Centratherum muticum Less., a species 
distributed in Australia and tropical America aeai Our 
plant is common in limestone formations of middle northern 
Luzon and is the only woody species in the genus. 
LUZON: 
Baguio, Province of Benguet, March 1904, Elmer 5956. 
3. VERNONIA SCHREB. 
Herbs, shrubs, climbers or small trees, with alternate 
leaves and terminal or axilliary, solitary cymose or panicled 
homogamous heads. Involucre ovoid, globose or hemispheric, 
equaling or shorter than the flowers, the bracts many ser- 
iate, the inner ones longest; receptacle naked or pitted, 
sometimes with short hairs; corollas all equal, tubular, slender, 
the 5 lobes narrow; anther bases obtuse; style arms subulate; 
achenes striate, ribbed or angled, rarely terete; pappus of 
many hairs, often with a row of outer short hairs or flat- 
tened bristles. 
