474 COMPOSITE. [Galinsoga. 



dilated towards their sheathing bases, the margins membranons. "Heads 

 i in. in diam., enlarging in fruit. Invol-hracts equalling the achenes, 

 oblong or elliptic, obtuse, strongly nerved aad with rather broad mem- 

 branous margins. Achenes ^ in. long, cuneate-oblong, obcompressed, 

 grooved, smooth, the margins very thick. 



Abundant, especially in wet sandy ground. Flowers during Sept. and Oct.. 

 DiSTKiB. Garhwal and Kumaon up to 4,000 if t., Punjab Plain, Chota 

 Nagpur, Chanda district in 0. Prov., also in Madagascar and Trop. Africa. 



33. GALINSOGA, Euiz. & Pav. ; Fl. Brit. Ind. iii, 311. 



Annual herbs. Leaves opposite, entire or toothed. JSeads small,, 

 peduncled, subterminal and axillary, heterogamous, rayed. Say- 

 flowers few, female, l-seriate, fertile; ligules spreading, white. 

 Dish-flowers 2-sexual, fertile, tubular, yellow, limb 5-fid. In- 

 volucre hemispheric; bracts few, 1-2 -seriate, oTate, obtuse, striate. 

 Receptacle conic or elongate ; pales slender, serrate. Anther-bases 

 subentire. Style-arms of 2-sexual flowers acute or with an acute 

 short tip. Achenes angled or the outer dorsally compressed. 

 JPappus of a few scarlous, entite awned or fimbriate scales, of the 

 ray often 0* — Species 5, natives of Trop. America. 



G. parviflora, Cav. Ic. iii, 41, t 281 ; F. B. I. iii, 311 ; Collett Fl. 8iml 

 264. 



A weakratber flaccid annual, 6-12 in. high. Stems erect, glabrous below, 

 hispid above. Leaves petioled, 1-2 in. long, ovate or ovate-lanceolate, 

 obtusely acuminate, 3-nerved, subserrate, membranous. Heads ^ in. in 

 diam., on very slender peduncles. Invol-hracts broad, green. Becep^ 

 tacle elongating in fruit. Pappus-scales narrowly oblong, edges fimbriate 



Dehra Dun. Flowers Aug. to Oct. Disteib. Very common on the 

 W. Himalaya up to 8,000 ft. near villages and in cultivated ground where 

 it has become quite an established weed. Indigenous in S. America. 



34. TRIDAX, Linn. ; Fl. Brit. Ind. iii, 311. 



Perennial herbs. Leaves opposite, pinnatisect ; segments few, 

 narrow. Seads very long-peduncled, heterogamous* rayed. Ray- 

 flotvers female, fertile, iigulate or 2-lipped, with the outer lip large, 

 3-fid or 3-partite, the inner small 2-lobed or parted or 0. Disk' 

 flowers 2-8exual, fertile, tubular ; limb elongate, 5-fid. Invol' 

 bracts few-seriate; outer short, broad, herbaceous. Receptacle 

 flat or convex ; pales membranous. AntJier-bases with short acute 

 auricles. Style-arms of 2-sexual flowers hairy above, tips subulate.. 



