828 PATAGONIAN EXPEDITIONS I BOTANY. 



& Hook, and also Eng. & Prantl, say " leaves opposite, " apparently by 

 an oversight, as Benth. & Hook, refer to T. glandulifera as in the genus.) 



TAGETES GLANDULIFERA Schrk. 



Heavy-scented annuals, with erect stem and short branches. Leaves 

 alternate, pinnatisect ; their segments linear-lanceolate, acuminate both 

 ways, serrate, 6-8 pairs and a terminal ; upper leaves subdecurrent, the 

 lower lobes of each aristate and small. Heads corymbose-fasciculate, 

 about 7 of them ending a branch. Ligttles 3, small. 



(S. Brazil; Argentina; Chili); N. Patagon., in cultivated places by Rio 

 Negro. 



47. DYSODIA Cav. 



Mostly annual, strong-scented, branching herbs, with dissected, glandu- 

 liferous leaves and small, radiate heads of yellow flowers. Involucral 

 scales i -seriate, partly united, mostly with small outer scales. Recep- 

 tacle pubescent. Rays short. Anthers basally entire or toothed. Style- 

 branches long, hirsute. Achenes obpyramidal, 3-5-angled, striate. Pap- 

 Pus-scales 10 or more, parted into bristles. 



Species 34, Southern and Western U. S. to Mex., and i in S. Amer. 



D. BELENIDIUM (DC. sub Hymenatherum as a genus). 



Erect undershrub, with basal leaves opposite, pinnatipartite, having 5 

 pairs of lateral lobes and a longer terminal, all subulate, rigid. Pedicels 

 long, i -headed, naked. Involucral scales united throughout. Pappiis- 

 scales 10-20, ending in 1-7 awns. 



(Chili; Argentina) ; N. Patagon., in rocky places by Rio Negro. 



48. ANTHEMIS Linn. Camomile. 



Herbs or undershrubs, often scented, with pinnatifid or dissected, alter- 

 nate leaves, and rather large, peduncled heads of yellow disk-flowers, and 

 white or yellow rays ending the branches. Involucre hemispheric, its 

 scales imbricated, several-seriate, scarious-margined, shorter outwards. 

 Receptacle convex, with chaff subtending the disk-flowers. Anthers basi- 

 obtuse. Style-branches in the disk truncate. Ac hems oblong, ribbed. 

 Pappus none, or a ring. 



Species 100, Europe and Mediterr. region ; a few introduced to Amer. 

 (Fig. in Eng. & Prantl, iv, 5, p. 271.) 



