80 Addisonia 



The history of the specimen from which our drawing has been 

 prepared is the same as that outHned for Pcnsienion calycos7is 

 (plate 136). The plant, placed in the soil in the summer of 1917, 

 su^^'^ved the ensuing severe winter, flowered in 1918, but died 

 without producing seed. 



It is surprising to find in the supposedly well-known flora of the 

 central portion of the United States a beard-tongue of the striking 

 distinctness of this, and moreover one scarcely known to collectors. 

 Like others of this genus, this species when seen in flower is very 

 distinct from its allies, but dried specimens, which have lost their 

 color and color-pattern and even much of the corolla form, are 

 more difficult of interpretation. Its alliance is certainly with Pen- 

 siemon hirsuius, from which the white flowers and the minute 

 pubescence distinguish it. It is most likely to be confused with 

 Small's P. pallidus, but that species has much more densely pubes- 

 cent leaves and smaller corollas, the white of which is broken, 

 within the throat on its lower side, by many longitudinal fine lines 

 of violet-blue. 



Francis W. Pennell. 



Explanation OF Plate. Fig. 1. — Flowering stem. Fig. 2. — Corolla opened 

 X 2. Fig. 3. — Anther, front view, X 5. Fig. 4. — Anther, rear view, X 5. 

 Fig. 5. — Portion of stem and leaves. 



