186 
LXXV. COMPOSITE. 
[Tridax. 
16 . TRIDAX, Linn. 
Procumbent hairy herb. Leaves opposite, pinnatisect, segments 
few, narrow. Heads solitary on long peduncles rayed. Ray- 
florets ligulate, outer lip large. Disc-florets bisexual, tubular; 
limb bifid. Bracts in few series, outers herbaceous. Achenes 
silky. Pappus of feathery bristles. Species 7, American, 1 now 
all over Asia. 
(1) T. procumbens Linn. Sp. PI. 900. 
Whole plant 6 to 12 in. long. Leaves few, ovate-lanceolate 
serrate, *5 to 2 in. long. Heads *4 to 6 in. across; peduncles erect 
3 to 8 in. long. Ray-florets creamy white, about 4 in a head. 
Disc-florets lemon yellow, lobes hairy, recurved. Outer bracts 
green, inner ones purplish. Bab. Sandy places, usually near 
the sea. Singapore, Sepoy lines; Changi; Galang. Malacca. 
Perak, Ipoh (Ridley). 
17 . VERNONIA, Schreb. 
Herbs, shrubs or trees. Leaves alternate. Heads homogamous 
in terminal panicles or axillary panicles or solitary axillary. 
Flowers violet or pink (never yellow). Involucre ovoid or hemi¬ 
spheric; bracts in many series, innermost longest. Corollas all 
equal, tubular, lobes 5, narrow. Fruit ribbed or angled, truncate 
at top. Pappus of many hairs in 2 rows. About 500 species. 
Trees. 
Leaves and branches glabrous . . . . (1) V. Wallichii 
Leaves beneath and branches tomentose . . (2) V. javanica 
Shrub sarmentose. 
Leaves white silky beneath ; panicles lateral . . {3) V. eleagnifolia 
Herbs. 
Heads in terminal panicles. 
Heads -6 in. through . . . . . . (4) V. attenuata 
Heads - 2 to *25 in. through. 
Bracts narrow-lanceolate; heads numerous 
small, peduncled . . . . . (5) V. cinerea 
Bracts broad lanceolate; heads few, larger, 
sessile . . . . . . (6) V. chinensis 
Heads solitaiy, long-peduncled axillary and ter¬ 
minal -5 in. through ; leaves serrate acutely . (7} V. Curtisii 
Heads axillary and terminal panicled, *5 in. long; 
leaves entire or obscurely serrate, 5 in. long . (8) V. rupicola 
(1) V. Wallichii Ridl. Journ. F.M.S. Mus. x. 145. Conyza 
acuminata Wall. Cat. 3034. 
Erect straight tree 60 ft. tall. Branches glabrous. Leaves 
thinly coriaceous elliptic acuminate, base narrowed often for some 
way, quite glabrous, reticulate, 3 to 6 in. long, 1*5 to 3 in. wide; 
nerves 15 pairs, distinct on both sides; petioles *5 in. long, slender. 
Panicles 7 in. long and as wide, tomentose. Bracts sub-tomentose 
or glabrous not ciliate. Flowers lilac. Fruit angled, smooth. 
Hab. Common in forests. Singapore, Tanglin; Pulau Ubin. 
Malacca, Bukit Bruang; Panchur. Pahang, Kwala Tembeling; 
