242 LXXVIII. COMPOSITE. (J. D. Hooker.) 



6. ELEPHANTOPUS, Linn. 



Rigid herbs. Leaves alternate. Heads homogamous of 2-6 flowers col- 

 lected into a head-like cluster. Involucre, compressed ; bracts about 8, dry, stiff, 

 alternately flat and conduplicate ; receptacle naked. Flowers all equally 4-lobed 

 and cleft on one side and with the lobes spreading somewhat palmately. 

 Anther-bases obtuse. Style-arms subulate. Ar.henes truncate, 10-ribbed ; 

 pappus bristles rigid, shining, slender and dilated below or chaff-like. DISTRIB. 

 Species 10-12, chiefly tropical American, with one cosmopolitan. 



1. E. scaber. Linn. ; DC. Prodr. v. 86; dichotomously branched, 1-2 ft. 

 high, strigose scabrid and villous, radical leaves obovate-oblong crenate cauline 

 few sessile, heads clusters of 1 in. diam. surrounded by cordate leafy bracts, 

 invol. bracts pungent, achenes hairy, pappus of 4-5 "rigid bristles dilated 

 at the base. Wall. Cat. 2979 ; Wight Ic. t. 1086 ; Roxb. Fl 2nd. iii. 445 ; 

 Don Prodr. 169; Dalz. $ Gibs. JBomb. Fl. 122; Clarke Comp. Ind. 28. 

 Rheede Hort. Mai. x. t. 7. 



Throughout INDIA, from the Punjab ? to CEYLON and SINGAPORE. DISTRIB. 

 Tropical Asia, Australia and America. 



The embryo not unfrequently germinates in the head. 



TRIBE II. ETJPATORIEJE. 



7. ADENOSTEBXBXA, F,,rst. 



Glabrous or glandular-pubescent herbs. Leaves mostly opposite. Heads 

 corymbose, homogamous. Involucre campanulate ; bracts many, sub-2-seriate, 

 narrow, herbaceous, sometimes connate ; receptacle flat, naked. Corollas all 

 equal, tubular, regular ; tube short ; limb campanulate, 5-toothed. Anthers 

 truncate with a glandular tip, base obtuse. Style-arms elongate, dilated above. 

 Achenes obtuse, 5-ribbed, glandular ; pappus hairs 3-5, short, rigid, often clavate, 

 inserted in a short ring. DISTRIB. Species 5 or 6 American, 1 cosmopolitan. 



1. A. viscosum, Forst ; DC. Prodr. v. iii. ; Clarke Comp. Ind. 28. 



Throughout INDIA ; ascending to 5000 ft. on the Himalaya and other ranges, and 

 to 6000 in Ceylon. DISTRIB. All tropical countries. 



An erect rarely decumbent annual, glabrous pubescent or viscidly pubescent, 

 slender or robust. Leaves sessile or petioled, opposite or the upper alternate, from 

 linear to broadly ovate, serrate. Heads few or many, in lax or dense panicles or 

 corymbs ; invol. bracts oblong, obtuse or acute, glabrous glandular or scabrid. Of 

 this most variable plant there is but one species. Clarke distinguishes the following 

 marked Indian forms. 



VAR. 1 . typica ; leaves oblong-lanceolate subacute crenate glabrescent, achenes 

 sparingly warted. DC. 1. c. A. leiocarpum, DC. in Wight. Contrib. 9 ; Prodr. I. c. 

 A, Roylei, DC. 1. c. 112. A. rivale, Dalz. in Hook. KewJourn. iii. 231 ; Dalz. $ Gibs. 

 Bomb. Fl. 122. A. angustifolium, Arn. Pugill. 29 ; DC. 1. c. vii. 266. Lavenia alba, 

 Wall. Cat. 3220. Ageratum aquaticum, Roxb. Hort. Beng. 61 ; Fl. Ind. iii. 415. 



VAR. 2. elata; leaves broadly ovate or cordate nearly glabrous, achenes and invol. 

 bracts as in Var. 1. A. elatum, DC. I.e. 112; ? Don Prodr. 181. A. aquaticum, 

 Don 1. c. A. microcephalum, DC. I. c. Lavenia erecta and carnosa, Wall. Cat. 3218 

 in part, 3219. Ageratum strictum. Sot. Mag. t. 2410. 



VAR. 3. latifolia ; leaves broadly ovate or cordate nearly glabrous sometimes 

 very^large, achenes densely warted. A. latifolium, DC. I.e. 112; Don Prodr. 181. 

 Lavenia erecta, Wall. Cat. 3218 C. one of the best marked varieties. 



VAR. '4. parviflora. ; leaves elliptic glabrous membranous, branches of panicle 

 slender, acnenes small densely, warted. A. macrophyllum and parviflorum, DC. I. c. 

 iii. 113. Lavenia macrophylla and vparviflora, Blume Bijd. 905, 906. Lavenia 

 viscida, Wall. Cat. 3222 A. 



