Aveust 16, 1906] MANUAL OF THE PHILIPPINE COMPOSITAE 105 
18. PLUCHEA. 
Pappus none. 
19. EPALTES. 
Chiefly herbs, with narrow linear bracts. 
Anthers tailed. 
20. BLUMEA. 
Anthers without tails. 
21. LAGGERA. 
Heads in dense ovoid masses. 
Pappus none. 
22. SPHAERANTHUS. 
Pappus hairs slender. 
23. PTEROCAULON. 
Heads androgynous or homogamous: involucral bracts 
hyaline and scarious; style arms of perfect flowers truncate. 
Perfect flowers sterile, with undivided styles. 
24. ANAPHALIS. 
Perfect flowers usually fertile, with divided styles, 
25. GNAPHALIUM. 
Heads heterogamous, radiate, rarely  subdisciform or 
homogamous; flowers usually all fertile; receptacle naked; 
perfect flowers with linear style arms, rounded or dilated 
at the top. 
. 26. CARPESIUM. 
18. PLUCHEA CASS. 
Herbs or small shrubs with alternate dentate or serrate 
leaves, rather small heterogamous heads in terminal corymbs. 
Involuere ovoid, the bracts herbaceous, imbricate; receptacle 
flat, mostly naked; outer flowers fertile, filiform, 3-dentate; 
the central ones perfect or sterile, 5-dentate; anthers sag- 
gitate, the auricles caudate; style entire or cleft; achenes 4 
to 5-angled; pappus capillary, scabrous. 
Species about 40; in all tropical and subtropical regions. 
Heads less than 4 mm. in diameter; a small shrub con- 
fined to the seashore and banks of tidal streams. 
