490 ONAGRACEAE. {Vor. IL. 
2. Kneiffia Alleni (Britton) Small. 
Allen’s Sundrops. (Fig. 2588.) 
OEnothera fruticosa var. humifusa Allen, Bull. Torr. 
Club, 1:3. 1870. Not OF. humifusa Nutt. 1818. 
Kneiffia linearis Alleni Britton, Mem. Torr. Club, 5: 
Knoifia hens Small, Bull. Torr. Club, 23:177. 1896. 
Low, perennial, finely appressed-pubescent; stems 
decumbent, at length diffusely branched, 3/-2° 
long, wiry and zigzag. Leaves oblanceolate to lan- 
ceolate, 4’-11¢ long, usually obtuse, undulate, ses- 
sile or short-petioled; flowers yellow, about 3//—1 
broad; racemes 1/-2/ long, usually interrupted: 
calyx villous, its tube 2//-3// long, striate, its seg- 
ments linear-oblong, as long as the tube; petals 
orbicular-obovoid, notched at the apex; capsules 
club-shaped, 3/’-4’’ long, the body subglobose, 
winged, shorter than the pedicels; seeds obovoid, 
to oblong, 14’ long, minutely pitted in rows. 
In sand, eastern Long Island. June-Aug. 
3. Kneiffia longipedicellata Small. 
Long-stemmed Sundrops. (Fig. 2589.) 
Knetffia longipedicellata Small, Bull. Torr. Club, 
23:178. 1896. 
Annual, slender, more or less puberulent; 
stems erect or assurgent, 1°-214° tall, red, sim- 
ple or sparingly branched above. Basal leaves 
spatulate or obovate-spatulate, 134’-3’ long; 
stem-leaves few, linear-lanceolate, 1/-214’ long, 
obtuse or acutish, entire, sometimes undulate, 
short-petioled; flowers yellow, 1/-2’ broad; ra- 
cemes 1/—4/ long; calyx hirsute, its tube slender, 
5’’-7’’ long, its segments nearly linear, longer 
than the tube, the tips free in the bud; petals ob- 
ovate, emarginate; capsules narrowly obovoid, 
the bodies about 5/’ long, their angles with stout 
pubescent wings, their faces strongly ridged, 
the pubescent pedicel longer than the body; 
seeds irregular, less than 14’’ long, minutely 
papillose. 
New York to West Virginia and Florida. May-Aug. 
4. Kneiffia linearis (Michx.) Spach. 
Narrow-leaved Sundrops. (Fig. 2590. ) 
OEnothera linearis Michx. F1. Bor, Am. 1: 225. 1803. 
Kneiffia linearis Spach, Hist. Veg. 4: 376. 1835. 
Biennial or perennial, slender, pilose or nearly 
glabrous. Stems erect or ascending, 6’-20’ tall, 
simple or much-branched above, finally angled; 
basal leaves spatulate or broadly oblanceolate, 2/— 
3’ long, entire or nearly so; cauline leaves 
linear, or linear-lanceolate, 1/-3/ long, slightly 
toothed, acute or obtuse, short-petioled; flowers 
yellow, 34’-134’ broad; racemes 1/-4’ long; 
calyx slightly pubescent, its tube 4’’-6’’ long, 
its segments linear-lanceolate, longer than the 
tube; petals obovate, shallowly notched at the 
apex and eroded; capsule oblong-club-shaped, 
4’’-7’’ long, the angles with papery glabrous 
wings, its faces ridged, narrowed into pedicels 
which are much shorter than the bodies; seeds 
irregular, %’ long, angled. 
Connecticut to Tennessee and Georgia. June-Sept. 
