Anisocheta. | COMPOSITZ (Harv.) 57 
Leaves alternate. Pappus of 3-5 unequal scales ... ... | (7) Amisocheta. s 
Leaves opposite : 
Heads many-flowered : 
Pappus of 5-10 broad, toothed, pointed scales ...| (8) Ageratum. ty 
Adenostemma. ~ 
Pappus of 3-5 gland-tipped bristles <.. ... ...» (9) 
Heads 4-flowered. Pappus of many, slender bristles ...- (10) Mikania. 
VII. ANISOCHZATA, DC. 
Heads many-flowered, homogamous. Jnvol. ovate, imbricated, its 
scales lanceolate, appressed, shorter than the disc. Aecept. naked. 
Corolla tubular, deeply and equally 5-cleft, the outer flowers curved 
downwards towards the periphery. Anthers sagittate. Style shortly 
exserted ; stigmata 2, cylindrical, obtuse, nearly smooth. <Achenia 
(unripe) oblong, striated, scarcely downy. Pappus of 3-5, narrow- 
subulate, much acuminated, unequal, erect scales. DC. Prod. 5, p. 109. 
A half climbing, or scrambling shrubby plant. The name is compounded of 
avicos, unequal, and xaiTn, a bristle ; alluding to the pappus. 
1, A. Mikanioides (DC. 1. c. p. 110.) 
Has. Between the Omsamwubo and Omsamcaba, Drege! Natal, Gueinzius! 542. 
(Herb. D., Sd., Hk.) 
Stem terete, flexuous, striate, pubescent; branches widely spreading or deflexed. 
Leaves alternate, petioled, broadly-ovate, 3~5-nerved and subtruncate or deltoid at 
base, coarsely and bluntly incised, thinly downy, becoming glabrous, except on the 
nerves and petiole. Panicle ending the branches, its divisions spreading; ultimate 
pedicels longer than the heads, with 2-3 scattered bractlets. Invol. scales in several 
rows, minutely gland-dotted and rough-edged. 
VIII. AGERATUM, Linn. 
Heads many-flowered, homogamous, subglobose. Jnvol. loosely im- 
bricated, its scales lanceolate, acuminate, equalling the disc. Recept. 
naked. Cor. tubular, equally 5-fid. Style exserted ; stigmas 2, cylin- 
drical, obtuse. Achenes with a basal callus, 5-angled, narrowed to the 
base. Pappus of 5-10, lacerate or pectinate, bristle-pointed (or obtuse) 
scales. DC. Prod. 5, p. 108. 
Herbaceous plants, chi American. A. conyzoides is commonly dispersed 
throughout the tropics of both hemispheres. Name unexplained. 
1. A. conyzoides (Linn. Sp. 1175); leaves ovate, rhomboid or cor- 
date, on longish petioles; scales of the pappus 5, broad and serrated at 
base, their long bristle-points equalling the small corolla) DC. l. ¢. p. 
108. Schk. Hanb. t. 238. Hook. Exot. Fl. t. 15. 
Has. About Port Natal, Dreye, Krauss, 233; Gueinzius, Gerr. § M‘K. 337, &e. 
(Herb. D., Sd., Hk:, &.) : 
Variable in pubescence and the shape of leaves, &c. Stem 2-3 feet high, terete. 
Leaves mostly pubescent, 13-2 inches long, crenate; the petioles mostly very hairy. 
Corymbs dense, terminal. Flower-heads 2-3 lines across. Corollas lavender-blue 
or white, small. 
se 
IX. ADENOSTEMMA, Forst. 
Heads many-flowered, homogamous. Receptacle flat, naked, honey- 
combed. Jnvol, campanulate, rather shorter than the flowers, reflexed 
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