204 EPILOBIACEAE. 



2. O. grandiflora Ait. Similar to 0. biennis, but larger throughout, sometimes 

 3 m. tall: petals 4-6 cm. long, golden-yellow: capsules linear-conic, 3-4 cm. 

 long, 4-sided. Occasional, on roadsides and in fence rows. Nat. of Ala. 



6. KNEIFFIA Spach. Annual or perennial small herbs. Leaf -blades 

 entire or shallowly toothed. Buds mostly erect. Flowers spicate, diurnal. 

 Petals yellow. Ovary clavate or stout. Capsule clavate or with an oblong or 

 ovoid body, 4- winged, or 4-angled. Seeds not tubercled. Sum. SUNDROPS. 



Capsules clavate. 



Young inflorescence erect : capsules pubescent : petals over 1 cm. long. 



Pubescence of the capsule of straight spreading hairs : pedicel-like base 

 longer than the capsule-body whose thick wings are pubescent. 



1. K. longipedicellata. 



Pubescence of the capsule of minute curved hairs : 

 pedicel-like base shorter than the capsule-body whose 

 thin wings are often glabrous. 2. K. linearis. 



Young inflorescence nodding at the tip : capsules glabrous 



or nearly so : petals less than 1 cm. long. 3. K. pumila. 



Capsules oblong or nearly so. 4. K. fruticosa. 



1. K. longipedicellata Small. Stems puberulent or short-hirsute, 3-8.5 dm. 

 tall: basal leaves with spatulate or obovate-spatulate blades 3.5-7.5 cm. long: 

 stem-leaves few; blades linear-lanceolate, 2.5-6.5 cm. long, entire, sometimes 

 undulate: sepals hirsute, 12-19 mm. long: petals mostly over 2 cm. long: 

 capsule-body narrowly obovoid, 6-10 mm. long, hirsute. Occasional, in low 

 grounds. 



2. K. linearis (Michx.) Spach. Stems puberulent, short-pilose or nearly gla- 

 brous, 1.5-5 dm. tall: basal leaves with spatulate or broadly oblanceolate 

 blades, 5-8 cm. long, entire or nearly so: stem-leaves usually few; blades 

 linear or linear-lanceolate, 2.5-7.5 cm. long, slightly toothed: sepals about 

 1 cm. long, pubescent: petals mostly 1.5-2 cm. long: capsule-body oblong- 

 clavate, 7-14 mm. long, canescent. S. Occasional, in the Susquehanna valley 

 and adjacent parts. Schists. 



3. K. pumila (L.) Spach. Stems puberulent, 2-6 dm. tall: basal leaves with 

 oblanceolate or spatulate blades: stem-leaves few or many; blades oblong, 

 linear or elliptic, 2-8 cm. long, entire or very nearly so: sepals 5-7 mm. long: 

 petals 6-9 mm. long: capsule-body obovoid or oblong-obovoid, 6-12 mm. long, 

 glabrous or nearly so. W. S. Not very common, in moist sandy places. 

 Sandstones and shales, schists. 



4. K. fruticosa (L.) Eaimann. Stems 3-9 dm. tall, green or purple, puberu- 

 lent: leaf -blades lanceolate, ovate-lanceolate, or oblong, 2.5-10 cm. long, mostly 

 denticulate: sepals 15-20 mm. long: petals 2-3 cm. long: capsule-body oblong, 

 6-9 mm. long, prominently winged. Common, in dry soil. 



7. GAURA L. Annual, biennial, or perennial herbs. Leaf -blades entire, 

 toothed, or pinnatifid. Flowers spicate or racemose. Hypanthium narrow, 

 somewhat prolonged beyond the ovary. Petals unequal, with clawed blades. 

 Stamens 8, declined. Style declined. Stigma 4-lobed, surrounded by a cup-like 

 border. Fruit ribbed or angled, often with a pedicel-like base. 



1. G. biennis L. Stems 6-15 dm. tall, villous-hirsute : leaf -blades lanceolate, 

 oblong-lanceolate, or elliptic, 3-10 cm. long, remotely denticulate or merely 

 undulate: buds pubescent: base of the hypanthium villous: sepals 8-9.5 mm. 

 long: petals white, sometimes turning pink, 711 mm. long: fruit elliptic to 

 oval-elliptic, 6-10 mm. long, more or less hirsute. Bather common, in dry 

 soil and along streams. Sum. 



8. CIRCAEA [Tourn.] L. Perennial herbs. Leaves opposite: blades 

 mostly toothed, petioled. Flowers racemose. Sepals 2. Petals 2, notched. 



