PENNELL: THE SPECIES OF KNEIFFIA 369 
6. KNEIFFIA RIPARIA (Nutt.) Small 
Oenothera riparia Nutt. Gen. N. Amer. Pl. 1: 247. 1818. ‘Has. 
On the banks of Cape Fear river, Wilmington, North Carolina, 
in situations subject to inundation.”’ 
Kneiffia riparia Small, Fl. SE. U.S. 842. 1903. 
Swamps along the Cape Fear River, near Wilmington, North 
Carolina. Little known, although recently re-collected by Dr. 
J. M. Macfarlane, C. S. Williamson, etc. Possibly not a distinct . 
species. 
7. Kneiffia brevistipata Pennell, sp. nov. 
Stem 2-4 dm. tall, pubescent. Leaves 3-6 cm. long, linear- 
lanceolate, acutish, densely strigose-pubescent with ascending 
hairs, the young leaves very silky. Bracts slightly exceeding the 
capsules. Hypanthium 6-9 mm. long. Sepals 7-9 mm. long, 
acutish; tips not free in the bud. Petals triangular, 12-15 mm. 
long. Filaments about one half length of petals. Anthers 3-3.5 
mm. long, yellow. Stigmas less than one half length of style. — 
Capsule-body clavate-oblong, 5-6 mm. long; wings raised beyond 
ridges; pubescent, becoming glabrate, especially distally; on a 
stipe less than its own length. 
Type, Poplarville, Mississippi, collected in flower and fruit, 
July 7, 1891, S. M. Tracy 1681; in the United States National 
Herbarium. 
Dry pine ridges, southern Alabama to eastern Louisiana. 
8. Kneiffia semiglandulosa Pennell, sp. nov. 
Stem 3-6 dm. tall, finely pubescent, becoming glandular above, 
purple-red. Leaves 5-9 cm. long, lanceolate-linear, acutish, 
finely pubescent with ascending hairs to glabrate.. Bracts much 
exceeding the capsules. Hypanthium 10-20 mm. long. Sepals 
10-13 mm. long, acuminate; tips not or slightly free in the bud. 
Petals triangular, 15-25 mm. long. Filaments about one half 
length of petals. Anthers 5-6 mm. long, yellow. Stigmas less 
than one third length of style. Capsule-body clavate, 8-10 mm. 
long, wings exceeding the prominent ridges; finely pubescent with 
spreading gland-tipped, usually also with some incurved glandless, 
hairs, often glabrous or nearly so; on.a stipe less than its own 
length 
Type, Biloxi, Mississippi, collected in flower April 21, 1891, 
S. M. Tracy 5064, in the United States National Herbarium. 
Pine-land, West Florida to southern Mississippi; on ballast at 
Wilmington, North Carolina. 
