14 rxxi. coMPOsiT.f:. 



KoNKAN : Law ! ; margins of rivulets near Robe, Bahell c|' Gibson. Deccan : com- 

 mon at Mahableshwar in sliatly woods, Cooke ! S. M. Country : Castlerocif, Bhiva \ 

 Kanara : marshy ground near Jagalbet (N. Kanara), Ritchie, 1807! — Distkib. 

 Tbroughout India; Ceylon. 



7. AGERATUM, Linn. 



Erect herbs or underslirubs. Leaves opposite or the upper alternate. 

 Heads homogamous, in dense corymbs or lax panicles ; flowers blue, 

 purple or white. Involucre campanulate ; bracts 2-3-seriate, linear, 

 SLibequal. Eeceptacle flat, or nearly so, naked or with caducous 

 scales between the flowers. Corollas all tubular, regular, the tube 

 scarcely distinct from the shortly 5 -fid limb. Anthers appendiculate at 

 the apex, obtlise at the base. Style-arms elongate, obtuse. Pappus of 

 5 short free or connate scales or of 10-20 narrow unequal scales. 

 Achenes 5-angled. — Distrib. All probably American, but 1 species widely 

 distributed throughout the Tropics ; species about 10. 



1. Ageratum conyzoides, Linn. Sp. PI. (1753) p. 839. Annual, 

 1-3 ft. high ; stem erect, branched, terete, more or less liairy. Leaves 

 opposite or the upper alternate, 2-3 by 1-2 in., broadly ovate, subacute, 

 crenate and with ciliate margins, more or less hairy on both sides, base 

 cuneate ; petioles 1-1^ in. long, hairy. Heads small, in dense terminal 

 corymbs ; flowers pale-blue or white, malodorous. Invol. -bracts linear, 

 very acute, ribbed on the back, ciliolate and with scarious margins. 

 Pappus of 5 scales, aristate, dilated at the base, serrulate, about equalling 

 the corolla. Achenes yV-jV ''^^- lo^g^ sharply angled, sometimes glandular, 

 attenuated at the base.^biaek. Fl. B. I. v." 3, p. 243 ; Grab. Cat. p. 98 ; 

 C. B. Clarke, Comp. Ind. p. 30 ; Trim. Fl. Cevl. v. 3, p. 13 ; Woodr. in 

 Journ. Bomb. Nat. v. 11 (1898) p. 647.— Flowers : Nov.-Mar. Vert^. 

 Oscidi ; Sahadevi. 



Naturalized in the Bombay Presidency, where it is common in the Deccan. It is 

 abundant in Ceylon, where it has become a very troublesome weed, and is known among 

 the planters as Goat- Weed from its peculiar odor. Deccan : Poona, Woodrow I, Coo/,e ! ; 

 Kirki, t/. Woodrawl S. M. Countky : Belgaum, Ritcfiie, 393 !— Distkib. Througliout 

 India : all hot countries. 



8. DICHROCEPHALA, DC. 



Annual branched glabrous or pubescent herbs. Leaves alternate, 

 toothed, lyrate, or piunatifid. Heads small, panicled, heterogamous, 

 globose or hemispheric ; outer flowers 5 , slender, oo - seriate, fertile ; 

 disk-flowers ^ , fertile. Involucre small ; bracts sub-2-seriate, shghtly 

 unequal and with dry margins. Receptacle slightly contracted within 

 the margin, elevated, the top fiat, naked. Corollas of the 5 flowers 

 slender, rigid, minutely 2-3-toothed, or expanded into a 3-4-fid limb ; 

 corollas of g flowers regular, tubular, with a narrowly campanulate 

 4-5-toothed limb. Anther-bases truncate. 8tyle-arins of ^ flowers 

 short, flattened, tips lanceolate. Pappus or in ^ flowers rarely of 

 2 or 3 minute bristles. Achenes compressed, with a thickened margin. 

 — Distrib, Asia and Africa ; species 5. 



]. Dichrocephala latifolia, DC. in Wir/7it, Contrlh. (1834) p. 11. 

 An annual weed 6 in. to 2 it. high ; stem usually divaricately branched, 

 pubescent. Leaves very variable, 2-3 by \ \}j in., alternate, obovate or 



