1920] Fernald,— American Varieties of Pyrola chlorantha 49 
TABLE VI. CrrcUMNEUTRAL SorL PLANTS (CALCICOLES). 
(Observed in northern Vermont and New Hampshire, 1919.) 
Cryptogramma Stelleri (Gmel.) Prantl (Pellaea gracilis Hook.). 
Cystopteris bulbifera (L.) Bernhardi (Filix bulbifera Underw icio 
Woodsia glabella R. Br. 
“ alpina (Bolton) S. F. Gray (W. hyperborea R. Br.). 
„Asplenium Ruta-muraria L. 
Thuja occidentalis L. (Also in subacid soils high in calcium salts.) 
Smilacina stellata Desf. (Vagnera Morong). 
Anemone riparia Fernald. 
Caltha palustris L. 
Braya humilis (C. A. Mey.) Robinson. 
Saxifraga Aizoon Jacq. 
a aizoides L. 
oppositifolia L. 
Parnassia caroliniana Michx. 
Astragalus Blakei Eggleston. 
Primula mistassinica Michx. 
Campanula rotundifolia. (Also in subacid soils high in calcium salts.) 
[11 
DEPARTMENT OF AGRICULTURE, Washington, D. C. 
THE AMERICAN VARIETIES OF PYROLA CHLORANTHA. 
M. L. FERNALD. 
To one who has been familiar with the large-flowered Pyrola 
chlorantha which occurs in scattered colonies through dry woods of 
southern New England, southern New York and Pennsylvania, it 
often seems strange that the smaller-flowered plant of northern New 
England and adjacent regions is conspecific with it. The common 
plant of eastern Massachusetts, for example, has numerous rounded 
leaves which make a conspicuous rosette, the blades often 3-4.5 cm. 
broad and nearly as long, and the greenish-white petals 6.5-9 mm. 
long and comparatively broad (3.5-6 mm.). This is the plant de- 
scribed by Barton in 1815 as P. convoluta.! In the White Mountains 
and across the northern half of Maine, on the other hand, P. chlor- 
antha is often quite leafless or has only a few leaves, these inclined 
! Barton, Fl. Phil. Prodr. 50 (1815). 
