40 



well known and these additional characters might serve to render 

 identification easier. For simple identification of the kind of 

 hair, it is not necessary to make thin sections of the leaf. An 

 entire leaflet, taken from an herbarium specimen, may be placed 

 on a slide and examined dry by reflected light, using the low 

 power of the compound microscope. 



Of the species examined, the following have the single-armed 

 hairs : Astragalus Drummondii Dougl., A. alpinus L., A. Bige- 

 lovii A. Gray, A. crassicarpus Nutt, A. fl.exuosiis (Hook.) Dougl., 

 A. Hypoglottis L., A. junciformis A. Nelson, A. racemosus Pursh. 

 Of these the first three have hairs somewhat longer than the 

 rest and longer than those of A. racemosus shown in Fig. I. 

 Only two of the species examined have the double-pointed hairs. 

 These are Astragalus adsurgens Pall, and A. Carolinianus L. 



The purpose of this note is merely to call attention to these 

 trichomes in the hope that systematists may find them useful. 

 University of Colorado, 

 Boulder, Colo. 



SHORTER NOTES 



Insect Visitors of Scrophularia. — With reference to Mr. 

 E. W. Berry's notes (Torreya, 3 : 8), it may be said that Scroph- 

 ularia is freely visited in Europe and America by short- 

 tongued bees. On Ruidoso Creek, New Mexico, Professor E. 

 O. Wooton found a Scropliularia (I suppose .S. montana, 

 Wooton) to be freely visited by three species of the bee-genus 

 Prosopsis, which I described as P. Wootoni, P. tridcntula and P. 

 RudbcckicB race Riddoscnsis. C. Robertson (Trans. St. Louis 

 Acad. 5 : 587) cites numerous species of bees, long- and short- 

 tongued, from ScropJuilaria in Illinois. Knuth (Blutenbiologie, 

 2 2 : 142 ff) gives a summary of the European records. 



T. D. A. COCKERELL. 

 East Las Vegas, New Mexico. 



Some interesting Hepaticae from Maine. — In a collection 

 representing fifteen genera and twenty-one species made in the 

 vicinity of Prospect Harbor, Maine, by Mrs. Alice R. Northrop 



