160 
LEAFLETS OF PHILIPPINE BOTANY (Vor. I, Art.7 
sized, sometimes conspicuously radiate; involucre double, the 
basal 5 bracts flat and partly united, the inner series em- 
bracing an achene and deciduous with it; receptacle convex 
or subconic; flowers heterogamous, the ray fertile and bear- 
ing yellowish white ligules; the disk perfect but sterile; 
anthers entire at base; achenes slightly incurved, cuneate; 
pappus none. 
Species 25; mostly tropical American. 
Leaves oblong, entire. 
1. M. sericeum. 
Leaves ovate, dentate. 
2. M. divaricatum. 
1. M. sericeum Lag. Elench. Hort. Madr. 1805: Gen. et 
Sp. Nov. 32, 1816. DC. Prod. 5; 518, 1836. F. Vil. Nov. App. 
117, 1880.—Annual, numerously branched from the base, with 
strigose stems and branches. Leaves opposite, sessile, thin, 
lanceolate or ovate in outline and sinuately toothed or lobed, 
nearly glabrous above, beneath covered with long adpressed 
hairs. Heads solitary upon slender trigose terminal or axil- 
lary peduncles; bracts 5, plane, pubescent, ovate, nerved, not 
enclosing the ray achenes; marginal flowers 5 to 7, pistillate 
and fertile; style arms cleft, flattened at the base, recurved 
at the apex; ligules subelliptic, yellow, abruptly contracted 
into a short stipe which is articulated to the ventral side 
of the achene apex; achenes obovoid, transversely rugose, 
bearing upon its dorsal apex a persistent oblique cartila- 
ginous crown terminating into a recurved awn; disk of 
sterile flowers upon an elongated receptacle, subtended by 
conduplicate hyaline bracts with a triangular obscurely fring- 
ed appendage; corolla tubular, minutely 5-toothed; style 
bearing an entire clavate stigma; anthers 5. 
We consider our specimen an introduced species from 
Mexico and agree with  Villar's identification. M. diffusum 
Cass. as well as M.  manillense Less. are undoubtedly 
synonyms. 
PHILIPPINES: 
1894-5 Marave 187. 
