162 LXX. COMPOSITiE. 



flat, dry, sepai'ate, conspicuous scales in single rows (in Ursinia with a few 

 slender bristles as an inner pappus). (Gen. 45-49.) 



1. Receptacles without palea?. (A glabrous, aqua- 



tic herb) 45. Cadiscus. 



2. Receptacles bearing palea? among the disk- 



flowers. 

 Leaves opposite, linear. Heads conglomerate, 



involucred 46. Oedeea- 



Leaves alternate. Heads separate. 



Rays female. Pappus of 2-3 unequal scales. 47. Callilepis. 



Rays neuter. Pappus of 5 obovate, obtuse 

 scales. Achenes with a silky tuft at base, 

 narrow 48. Sphenogyne. 



Rays neuter. Pappus of 5 obovate scales, 

 and 5 inner slender bristles. Achenes ob- 

 ovate, quite glabrous 49. Ursinia. 



Subtribe 3. Anthemide35. Leaves rarely opposite. Heads discoid or 

 radiate. Receptacles nude or bearing palea?. Anthers wholly without 

 tails, blunt at base. Pappus either 0, or coroniform, or consisting of a few 

 minute scales or jointed hairs. (Gen. 50-75.) 



1. Receptacles bearing palese between the flowers. 



Heads radiate. Achenes glabrous. Leaves 



opposite 50. EuMORPHiA. 



Heads more or less radiate. Achenes woolly. 



Disk-flowers perfect. Leaves pinnatisect . 51. Lasiospermum. 



Disk-flowers male. Leaves simple or 3-fid. 



Rigid shrubs 75. Eriocephalijs. 



Heads homogamous, discoid. Pappus either 



minutely scaly, or of a few short hairs, or 0. 74. Athanasia. 



2. Receptacles nude, not bearing palese among the 



flowers. 

 * Heads discoid. 



Corolla of disk-flowers 5-tootlied. 



Heads homogamous (all flowers similar 

 and perfect). 

 Pappus (shrubs or half-shrubs). 

 Corolla glabrous. 



Leaves hnear, entire . . . ' . .73. Stilpnophytum. 

 Leaves cuneate, 3-5-lobed or 



toothed ^Q. Pextzia. 



Corolla glandular. Achenes terete . 68. Adenosolen. 

 Corolla pubescent. Achenes scabrid. 60. Erachymeeis. 

 Pappus membranous, oblique,^, ear- 

 shaped. 

 Small shrubs or undershrubs . . . 66. Pentzi^. 

 Annuals, with pinnatisect leaves . 6L Matricaria. 

 Pappus of several small, equal scales . 67. Maeasmodes. 

 Heads heterogamous ; marginal flowers 

 filiform, female. 

 Disk-flowers male, with abortive ova- 

 ries 65. HiPPiA. 



Disk-flowers fertile, ovuliferous . . .64. Artemisia. 

 Corolla of disk-flowers 4-toothed. 

 Tube of corolla not flattened or winged. 



