156 SYNGENESIA POLYGAMIA ^QUALIS. [CI. 19. 



400. SOLIDaGO. Recept. naked, pitted. Down simple. Cal. im- 

 bricated, with close scales. Florets of the radius about 5. 



399. ASTER. Recept. naked. Down simple. Cal. imbricated ; 

 lowermost scales spreading. Flor. of the radius more than 10. 



398. SENeCIO. Recept. naked. Down simple. Cal. double; the 

 innermost cylindrical, of numerous equal scales ; outer of 

 several minute ones ; scales all withered at the extremity. 



397. TUSSILaGO. Recept. naked. Down simple. Cal. simple, 

 tumid at the base; scales numerous, equal, somewhat mem- 

 branous. Seed obovate, compressed. 



402. CINERARIA. Recept. naked. Down simple. Cal. simple, 

 cylindrical ; scales numerous, equal. Seed quadrangular. 



408. ANTHEMIS. Recept. chaffy. Seed crowned with a slight 



border. Cal. hemispherical ; scales nearly equal. Flor. of the 

 radius numerous, oblong. 



409. ACHILLEA. Recept. chaffy. Down 0. Cal. ovate ; scales 



imbricated, unequal. Flor. of the radius 5 — 10, roundish, 

 somewhat heart-shaped. 



Bidens 2. 



Order III. POLYGAMIA FRUSTRANEA. Florets 

 of the disk perfect and fertile ; those of the circumference 

 neuter. 



410. CENTAUReA. Recept. bristly. Down simple, or feathery, 



rarely wanting. Flor. of the radius funnel-shaped, dilated, 

 irregular, without stamens or style. 



SYNGENESIA POLYGAMIA JEQUALIS. 



370. TRAGOP6GON. Goat's-beard. 



1 . T. pratensis, 7. 434. (Yellow G.) Calyx about equal to the co- 



rolla. Leaves keeled, tapering ; dilated and somewhat undu- 

 lated at the base. Flower-stalk cylindrical. 



Grassy past. $ . 6. Smooth. juicy, H — %f- Fl. yell, opening early. 

 *1. T. major, Jacq. Austr. t. 29. (Greater G.) Calyx more than half 

 as long again as the yellow corollas. Leaves smooth, acumi- 

 nated, channelled. Flower-stalk swelling upwards. 



Past, in the N., rare. $ . 6, 7. Fl. yellow. 



2. T. porrif alius, 9. 638. (Purple G.) Calyx half as long again as 



the corolla. Leaves tapering, straight. Flower-stalk swelling 

 upwards. 

 Wet past. rare. $ . 5, 6. Smooth, juicy, 4.f. Dull purple. 



371. PlCRIS. Ox-tongue. 

 1. P. echioides, 14. 972. (Bristly O.) Outer calyx of five broad 



