162 LEAFLETS OF PHILIPPINE BOTANY (Vou. I, Arr. 7 
length; ligulate flowers few, female subtended by 1 cm. long 
bracts; corolla yellow, the 2 mm. long glabrous ligule grad- 
ually expanding into the spatulate or oblanceolate 3-toothed 
ligule proper; central flowers many, yellow, each subtended 
by a palea; the rigid palea linearly acuminate, conduplic- 
ate, hyaline margined, usually also with a conspicuous 
hyaline keel which as well as the lateral edges are scabrous 
toward the apex; corolla tubular and enclosed in and sim- 
ilarly curved with the palea, its 5 yellow segments short 
and obtuse; anthers 1.5 mm. long, narrowly linear, apex 
triangularly acute, base extending into short slender tails; 
filaments linear, flattened, inserted below the middle of the 
tube; style barely exceeding the corolla, 2 or sometimes 
3-cleft; achenes 2 mm. long, mostly curved, reddish brown, 
sparsely hispid, 5-costate, obscurely compressed on the back; 
paleaceous pappus unequal, setosely terminated, less than 
1 mm. long. 
Type specimen 514 collected by E. D. Merrill in a dry 
open grassy valley at Halsey Harbor, Island of Culion, 
December, 1902. The leaves of the genus Chrysogonum are 
described as being opposite, while those of our specimen are 
alternate, although in every other respect it apparently agrees 
with the generic diagnosis. 
30. SIEGESBECKIA LINN. 
Glandular pubescent herbs, with opposite toothed leaves, 
Heads heterogamous, in leafy panicles, yellow or white; outer 
flowers fertile with short tube 2 to 3-segmented; disk flower 
perfect, fertile or the innermost sterile, tubular and 5-toothed 
or narrower and 3 to 4-toothed; involucre hemispheric; 
bracts few, glandular, the outer leaf like and spreading, the 
inner ones enclosing the outer flowers; receptacle small; 
anther bases entire; style arms short and flattened; achenes 
obovoid, often incurved; pappus none. 
Species 4; tropical and subtropical regions. 
1. S. orientalis Linn. Hort. Cliff. 412, 1737. DC. Prod. 
5; 495, 1836. Mig. Fl. Ind. Bat. 2; 67, 1856. Benth. Fl. 
Hongk. 182, 1861: Fl. Austr. 3; 535, 1866. F. Vil. Nov. 
App. 117, 1880. Hook. Fl. Brit. Ind. 3; 304, 1881. Vid. 
