116 
Corolla white, rather strongly inflated. Anther-secs 
usually barbate. Stem glabrous or nearly 2. P. Digitalis. 
Corolla light violet-purple, moderately ase jathe 
sacs glabrous. Stem puberulent. 3. P. Pentstemon. 
Corolla with throat scarcely inflated, its mouth closed by the 
anterior lip, which closes as a convex arc. Sterile fila- 
ment very densely bearded. Calyx-lobes ovate. 
Plants lower, the stem pubescent or hirsute 
Corolla 15-20 mm. long, white with violet lines. Anther- 
sacs oval. Calyx-lobes obtuse to short-acuminate. 
Stem and leaves soft-canescent. Leaves lanceolate. 4. P. pallidus. 
Corolla 23-28 mm. long, lavender-purple, unlined. An- 
ther-sacs triangular-orbicular. Calyx-lobes acumi- 
nate to caudate. Stem and frequently midrib of 
leaves beneath more: or less lanose-hirsute. Leaves 
lanceolate-attenuate. 5. P. hirsutus. 
1. PENSTEMON TUBIFLORUS Nutt. 
Flowering in June. 
Fields, seen only from Spring Valley, Rockiniid Co., Meee 
Introduced from the southwestern Mississippi Valley. 
2. PENSTEMON DIGITALIS Nutt. 
Flowering from mid-June to early July, fruiting in late August 
and September. 
Fields and meadows, frequent above Fall-line. Introduced 
from the southwestern Mississippi Valley. 
3. PENSTEMON PENTSTEMON (L.) MacMillan. 
Flowering in June and July. 
Fields and meadows, seen only from Rockland Co., New York 
and Bergen and Gloucester counties, New ee Introduced 
from the South Atlantic states. 
4. PENSTEMON PALLIDUS Small, Fl. S. E. Un. St. 1060, 1337- 
1903. 
“Type, Bedford, N. Y., Britton, June, 1900, in Herb. N. Y. 
B. G.” Type seen; also the plant re-collected and 
studied at the type-station. 
Flowering from mid-May to late June. 
Sandy or barren soil, occasional, mostly above the Fall-Line. 
Certainly introduced from the central Mississippi Valley. 
5. PENSTEMON HIRSUTUS (L.) Willd. 
Chelone hirsuta L., Sp. Pl. 611. 1753. “Habitat m Vir- 
