134 Muhlenbergia, Volume 6 



of figures i and 4, however, an additional drawing of the lower 

 calyx lip was added from detached material, flattened out under 

 a cover-glass, to show the small interstitial bractlets not in evi- 

 dence until the flower is dissected; and also in figure 4, the tri- 

 dentate tendency of the apex, another character not evident un- 

 less the sharply keeled lip is flattened out. 



I will now proceed to define what I here accept as the Mi- 

 cranthus group. As to the North American annuals of the sub- 

 genus Lupinus, I recognize three groups, indicated by the fol- 

 lowing key: 



Flowers scattered Concinni 



Flowers verticillate 



Plants large, succulent, puberulent Affines 



Plants small, more fibrous, villous Mieraiithi 



In the Micranthi as thus designated, I accept: L. nanus 

 Dough, L. vallicola Heller, L. pachylobus Greene, L. bicolor 

 Lindl., L. sp., L. irifidus Torr., L. rostratus Eastw., L. umbel- 

 la tus Greene, L. micranthus Dough, and L. poly carpus Greene. 

 Of these I have collected but six, so can say nothing, from my 

 own field experience, of pachylobus, micranthus, rostratus, and 

 umbcllatus. L. pachylobus belongs to the lv San Francisco Bay 

 region," but was not found by me; L. umbellatus is found in 

 southern California (1), and on one, at least, of her islands (2); 

 L. rostratus, from San Luis Obispo county, apparently has not 

 been recorded since described; and L. micranthus will probably 

 .some day be acknowledged as not found in middle western Cal- 

 ifornia, unless represented by what is now known as L. polycar- 

 pus. 



Lupinus nanus Dough; Benth. Trans. Hort. Soe. II. 1: 409. 

 1835. 

 Easily determined and probably not often incorrectly placed. 

 I have not illustrated this species, but will say that the side view 

 ol the banner is much as in L. vallicola, but the sides often fold 

 backward to sucll an extent that the front view gives more the 

 effect portrayed for /.. bicolor. My collections are as follows: 



( 1 ) Specimens collected by Abraras, determined by Greene. 

 (2) Greene, Bull. Cal. Acad. I: [45. [886. 



