32 Addisonia 



The plant grows naturally on shaded calcareous soils. I have 

 seen it in profusion on limestone ledges in ravines on the forested 

 slopes of jMonte Sano, north of the Tennessee River, in northern 

 Alabama. From there it occurs northward through central 

 Tennessee and Kentucky, and has even been found as far as Lafay- 

 ette, Indiana. It should be looked for through this and adjoining 

 areas. 



Penstemon calycosus was first described from specimens collected 

 by Eugene P. Bicknell at Nashville, Tennessee. He found it 

 plentiful on the bluffs of the Cumberland River. The history of 

 the plant we now illustrate is this: On May 28, 1917, I sent from 

 IMonte Sano, Alabama, by mail, a single plant in blossom. It 

 arrived too wilted for painting, but was placed in our herbaceous 

 grounds. On my return to the Garden in April of last year, after 

 there had been experienced here a winter of record-breaking pro- 

 longed cold, imagine my surprise to find that this root from "the 

 South" had increased to a considerable clump, and gave promise of 

 abundant bloom. This was realized and both flower and fruit 

 obtained. This history is convincing evidence of the ease of 

 culture of the long-sepaled beard-tongue. 



Francis W. Pennell. 



Explanation OP PivATE. Fig. 1. — Flowering stem. Fig. 2. — Leaf. Fig. 3. — 

 Flower opened, exposing stamens. Fig. 4. — Anther, front view, X 5. 



