HOFFMANN: FLORA OF BERKSHIRE COUNTY. 315 
P. nigra Marsh. Black Ash. — Swamps and borders of streams; 
common. 
F. pennsylvanica Marsh. Red Ash. — Occasional along . the 
Housatonic River in Sheffield. 
var. lanceolata (Borkh.) Sarg. Green Ash — Williamstown 
(Churchill). 
LIGUSTRUM. Privet. 
L. vuLGARE L. Privet. — On a limestone ridge, Williamstown. 
SYRINGA. Lilac. 
S. vulgaris L. Common Lilac. — Persisting and spreading about 
old house sites; occasional. 
GENTIANACEAE. GENTIAN FAMILY. 
BARTONIA. 
B. virginica (L.) BSP. — Mossy knolls in upland pasture, Great 
Barrington. 
GENTIANA. Gentian. 
G. Andrewsii Griseb. Closed Gentian. — (Dasystephana An- 
drewsii 111. Fl. ed. 2.) 
Moist woods and low ground; occasional in the valley. North 
Adams (Churchill); Alford; Sheffield (Churchill). 
Corolla with nearly truncate summit; the firm true lobes nearly 
obsolete, narrowed at the summit; the broader intervening thin 
prolongations of the membranous bands forming a fimbriate-dentate 
border. 
forma albiflora Britton, — Low shaded ground, Sheffield. 
G. clausa Raf. Closed Gentian. — {G. Andreicsii Man. ed. 7 
and III. Fl. ed. 2 in part; vld. Rhodora, 19: 14S, 1917.) 
. Moist woods and low ground, common. 
Corolla with the broad rounded lobes 2 to S mm. long; as broad or 
broader tlian tlie intervening 2- to 3-cleft appendages. 
G. crinita Froel Fringed Gentian Wet meadows, hillside 
pastures and borders of swamps, eomnion in tlie \ alley. 
G. quinquefolia L. - r])l:in(l pastures, t)pen hillsides and shaded 
banks; freciuent in the valley. A specimen from Sheffield 7."! dm. 
tall. 
