177 
Capsules more or less club-shaped. 
Capsules pubescent. 
Stems decumbent, spreading ; pedicels shorter than the 
body of the capsules. 2. K. Alleni. 
Stems erect or nearly so, not spreading. 
Pedicels longer than the body of the capsules. 
Body of the capsules subglobose ; leaves numerous. 3. A. sudglobosa. 
Body of the capsules obovoid, leaves few. 4. K. longipedicellata. 
Pedicels shorter than the body of the capsules, 
Capsules on slender pedicels, with thin wings. 5. X. dinearés. 
Capsules on stout pedicels (sometimes nearly ses- 
sile) with thick wings. 6. K. Spachiana. 
Capsules glabrous or glabrate. 7. K. pumila, 
Capsules oblong or nearly so. 
Plants not glaucous ; capsules less than 1 cm. long. 8. K. fruticosa., 
Plants somewhat glaucous; capsules 1 cm. long. 9. A. glauca. 
I. KNEIFFIA LINIFOLIA (Nutt.) Spach. 
OLnothera linifolia Nutt. Journ. Acad. Phila. 2: 120. 1821. 
Kneiffia linifolia Spach, Nouv. Ann. Mus. Par. 4: 368. 1835. 
Kansas and Illinois to Texas and Georgia; ascends only a few 
meters above sea-level. 
2. KNEIFFIA ALLENI. (Britton). 
OEnothera fruticosa var. humifusa Allen, Bull. Torr. Club, 1: 3. 
1870. Not OF. humifusa Nutt. 1818. 
Kueifia linearis Alleni Britton, Mem. Torr. Club, 5: 235. 1894. 
Eastern end of Long Island, at sea-level. 
This local form must be separated from the species with which 
it has been associated on account of its habit, flowers and capsule. 
3. KNEIFFIA SUBGLOBOSA Nn. Sp. 
Perennial, slender, puberulent, dull green, producing numerous ~ 
stolons. Stem erect, 2-3 dm. tall, much branched, strict or slightly 
flexuous, red; basal leaves spatulate, 4-10 cm. long, obtuse or 
acutish, undulately toothed, gradually narrowed into a short 
petiole; stem leaves linear or nearly so, 2-7 cm. long, entire or dis- 
tantly toothed, narrowed into a short petiole or sessile, slightly 
revolute; flowers in terminal racemes which are more or less 
corymbosely arranged, yellow, about 3 cm. broad; calyx villous or 
silky, its tube slender, 1 cm. long, about twice as long as the 
ovary, its segments linear, about as long as the tube and less 
pubescent, the tips free in the bud; petals obovate, 1.5 cm long, — 
notched at the apex; filaments nearly one half as long as the petals; _ 
