24 University of California Publication*. [BOTANY 



a. Inflorescence of small loose clusters; calyx mainly herbaceous; 



corolla tube yellow, throat ample with dark purple markings, 

 lobes pale purple to pinkish. 16. G. tricolor. 



b. Inflorescence of small loose clusters; calyx mainly herbaceous; 



corolla with dark spots at the base of the lobes ; plant small and 

 glandular. 17. G. millifoliata. 



c. Inflorescence of terminal and axillary clusters, few-flowered ; 



calyx mainly herbaceous ; corolla tubular-funnelform, lobes only 

 one line long. 18. G. Nevinii. 



d. Inflorescence a panicle, and flowers solitary on long and short 



peduncles. 19. G. peduncularis . 



e. Inflorescence of loose head-like clusters; calyx almost entirely 



herbaceous; corolla less than one-half inch long, dark blue. 



20. G. multicaulis. 



f. Inflorescence of large, rather loose clusters ; calyx mainly hyaline ; 



corolla one-half to three-fourths inch long, funnelform with 

 abrupt dilation. 21. G. abrotanifolia . 



g. Inflorescence of dense heads; calyx as broad as long, chiefly 



hyaline; corolla bright blue, throat abruptly dilated; stamens 

 much exserted. 22. G. Chamissonis. 



h. Inflorescence large conglomerate clusters, more or less woolly- 

 pubescent; corolla throat very abruptly dilated, ample, pale, 

 lobes blue; stamens little exserted. 23. achilleae folia . 



i. Inflorescence small, capitate; corolla light blue to white, throat 

 abruptly dilated but not ample, lobes slender; stamens white, 

 much exserted. 24. G. staminea. 



j. Inflorescence small, capitate; corolla light blue, slender through- 

 out; stamens equal to or shorter than the lobes. 



25. G. capitata. 



D. Subgenus Ipomopsis. Biennial; inflorescence thyrsoid-paniculate ; 



flowers yellow to red, showy. 26. G. aggregata. 



E. Subgenus Elaphocera. Biennial or short-lived perennial, woolly; 



leaves short and pinnatifid, pinnae and rachis broad and lax; 

 flowers capitate-congested. 27. G, congesta. 



F. Subgenus Hugelia. Erect and rigid, white-woolly at least when 



young; leaves narrow-linear with few linear divisions; stamens 

 always exserted, anthers sagittate. , 



a. Boot perennial, stems woody; leaves rigid with few very short 



divisions; inflorescence large. 28. G. densifolia. 



b. Root annual or biennial; leaves less rigid w T ith few lax divisions; 



inflorescence small scattered clusters. 29. G. virgata. 



c. Annual ; leaves mostly entire and filiform ; flowers solitary or 



two to three in a cluster, white with narrow dark spots in the 

 throat. 30. G. sparsiflora. 



d. Annual; corolla sulphur-yellow. 31. G. lutescens. 



G. Subgenus Leptodactylon. Phlox-like, rigid perennials, with alter- 



nate three -parted leaves, more or less fascicled in the axils. 

 a. Two to five feet high; corolla salverform, more than one inch 

 long with nearly equal breadth of limb. 32. G. Calif ornica. 



