SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. J27 



but my recollection is that it is easily apparent in fresh material 

 and I find this is true of several of the species examined. 



In Heterotheca floribunda the style-branches are not 

 especially distinct from those of some other tribes but the sub- 

 apicial separation is very marked. 



Both species of Hemizonia examined show long slender 

 subulate style branches easily confused with Asteroidese except 

 that the separation is apical. This is true also of the Chaenactis 

 examined. 



The following plants are reported from memory as having 

 been examined. 



SUB-APICI 



Tribe Asteroideas 



Grindelia robusta 



Chrysopsis sessilifolia var. echoides 

 Ivcssingia glandulifera 

 Corethrogyne filaginifolia 

 Tribe V. Helianthoideae 

 Helianthus annuus 

 I have not had an opportunity to test any of the species of 

 the Tribe Vernonaceae. A cultivated Stevia (Eupatoriaceae) 

 shows a mode of separation distinct from any of the foregoing. 

 In the bud, the style-branches lie flat and complanate. The 

 separation is apical but instead of reflecting from the apex, the 

 style-branches open out as if hinged near the base and the tips 

 show a tendancy to curl inward and as soon as the plant begins 

 to wilt, the style-branches become circinate, curled in toward 

 each other. 



In Centaur ea melitensis (Cynaroideas) the style-branches do 

 not separate; in fact the style is tipped with three short subulate 

 lobes scarcely distinguishable except under a compound lens. 



Perezia microcephala (Mutistiaceae) shows style-branches not 

 unlike Senecio Douglasii but the Tribe is easily distinguished by 

 its labiate florets. 



I believe further investigation in this direction will show 

 that it is possible to construct a key to the tribes that would 

 obviate the necessity of considering so many confusing features 

 as at present. If so, it would be valuable in the field and often 

 helpful in the herbarium, and would not interfere with the estab- 

 lished order of things. 



