LXX. COMPOSlT^Ti. 



1G3 



Shrublcts or half-woody perennials. 

 Achcnes glabrous. Flowers all per- 

 fect 62. Tanacetum. 



Marginal achenes villous ; of tlie 



disk glabrous, abortive . . . .63. ScniSTOSTEPniuM. 

 Annuals with pinnatisect leaves . .61. Matkicaeia. 

 Tube of corolla llattened or winged. 

 Annuals or small, tufted perennials. 



Corolla not spui-red at base . . .71. Cotula. 

 Corolla with a broad spur, infolding 



the ovary 70. Otochlamys. 



Yirgate shrubs, with entire, sessile 



leaves 69. Peyrotjsea. 



** Heads radiate. 



Corolla of disk-flowers 4-toothed. 

 Herbs with multifid leaves. 



Disk-flowers flat-tubed. Achenes 



flat 72, Cenia. 



Disk-flowers terete. Achenes angu- 

 lar 61. Mateicaeia. 



Small shrubs or half-shrubs. 



Rays female. Leaves hnear or 3-fid. 58. Adenach^na. 

 E-ays neuter. 



Leaves lobed or piunatifid , , .52. Lidbeceia, 

 Leaves linear, entire, silky . . ,53, Thaminophyllum. 

 Corolla of disk- flowers 5-toothed. 



Involucral scales in 1 row, connate or 

 concrete. 

 Disk fertile; all the achenes glabrous. 54, GtAMOLepis. 

 Disk sterile ; ray-acheues silky, fer- 

 tile 55. Steirodiscus. 



Involucral-scales imbricate, in few or 

 many rows. 

 Rays white. 



Small shrubs or half-shrubs, 

 Achenes papillose or glandular. 

 Receptacles flat. Ray-flowers 



some filiform, someligulate. 57, Piiymaspeemum, 

 Receptacles convex, Ray- 

 flowers all ligulate . . . 58. 

 Achenes angidar, smooth . . 59. 

 Herbs with multifid leaves . . 61. 

 Rays yellow. 



Heacts corymbose ; rays 1-2 . . 56. Iocaste. 

 Heads solitary, terminal ; rays 



several 59. Cheysantiiemtjm. 



Adenach.ena, 



Chrysanthemum. 



Mateicaeia. 



Subtribe 4. Gnaphalie^, Leaves alternate, very frequently woolly. 

 Anthers tailed at base. Involucral scales mostly membranous, shining, 

 not withering. Pappus various. (Gen. 76-106.) 



1. Heads 1-flowered, either in spikes or glomerules. 



Pappus feathery 92. Stoebe, 



Pappus 93. Peeoteiche. 



2. Heads several-flowered, discoid. 



M 2 



