A flora of Manila - Rainforestation

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A FLORA OF MANILA
7. Paleae of the receptacle flat, narrow 19. Eclipta
7. Paleae of the receptacle embracing the achenes.
8. Pappus of 2 to 4 thin, chaffy, deciduous scales; coarse
erect, cultivated plants with very large heads.
20. Heliantfms
8. Pappus none 21. Wedelia
3. Pappus of 2 or 4 awns.
4. Achenes long-beaked 22. Cosmos
4. Achenes not beaked _ 23. Bidens
1. All the flowers ligulate, no tubular ones present; herbs with milky juice.
2. Leaves scattered along the stem, not rosulate.
3. Achenes beaked 24. Laciuca
3. Achenes not beaked 25. Sonchus
2. Leaves all or mostly basal, rosulate 26. Crepis
1. VERNON lA Schreber
Erect herbs, woody vines, or trees. Leaves alternate, entire or toothed.
Heads terminal or axillary, cymose or panicled. Involucre as long as or
shorter than the flowers, the bracts in many series, the outer ones shorter.
Flowers all perfect, the corollas all equal, tubular, slender, 5-lobed. Achenes
striate, ribbed or angled; pappus hairs numerous. (In honor of W. Vernon,
an early English botanist.)
Species more than 400, chiefly tropical, about 12 in the Philippines.
Heads about 8 mm in diameter 1. V. patula
Heads about 2.5 mm in diameter 2. V. cinerea
1. V. PATULA (Ait.) Merr. (V. chinensis Less.). Bulac-manoc (Tag.).
An annual, erect, rather stout herb with spreading branches, 1 m high
or less, more or less ashy-puberulent. Leaves sessile or petioled, ovate
to elliptic-lanceolate, 2 to 12 cm long, shallowly toothed. Heads 40- to
70-flowered, ovoid, peduncled, in leafy panicles, scattered or in pairs, about
1 cm long, 8 mm in diameter, the involucral bracts green, the flowers
pale-purple.
In open waste places, occasional, fl. Sept.-Apr., widely distributed in the
Philippines and undoubtedly an introduced plant here. India to southern
China and Malaya.
2. V. CINEREA (L.) Less.
An erect, slender, sparingly branched, somewhat pubescent, annual herb
20 to 80 cm high. Leaves petioled, oblanceolate to obovate, acute or ob-
tuse, shallowly toothed, 2 to 6 cm long. Heads small, peduncled, in open,
lax corymbs, about 7 mm long, 2.5 mm in diameter, the flowers rather
bright-purple, about 20 in each head, twice as long as the involucral
bracts. (Fl. Filip. pi. 280.)
In open waste places, common, fl. all the year; throughout the Philippines,
but certainly introduced. Tropical Africa and Asia through Malaya
to Australia.
2. EUPATORIUM Linnaeus
Perennial herbs or undershrubs with opposite or alternate leaves. Heads
corymbose, many-flowered, homogamous, the involucre long or short, of
few- to many-seriate subequal bracts, or the outer bracts shorter; recep-