EHINANTHACEAE. 263 



2. D. flava (L.) Wood. Stems 3-12 dm. tall: leaf -blades lanceolate to oblong, 

 4-14 em. long, repand or coarsely toothed, or rarely pinnatifid on the lower 

 part of the stem : calyx-tube turbinate at maturity : corolla 3-4 cm. long : cap- 

 sules ovoid-conic, about 15 mm. long. — Common, in woods and thickets. — 

 Sum. — Downy false-foxglove. 



3. D. virginica (L.) Britton. Stems 8-15 dm. tall: leaf -blades ovate-lanceo- 

 late to lanceolate or linear-lanceolate, 9-20 cm. long, 1-2-pinnatifid : calyx- 

 tube 5-6 mm. wide in anthesis : corolla bright-yellow, 3-4 cm. long : capsules 

 oval or oval-ovoid, 10-15 mm. long. — S. Occasional, in woods near McSpar- 

 ran. — Schists. — Late sum. — Smooth false-foxglove. 



14. AGALINIS Raf. Annual or perennial, mostly slender herbs. Leaf- 

 blades narrow or scale-like, entire. Flowers axillary. Calyx-lobes 5, mostly 

 shorter than the tube, often minute. Corolla funnelform, slightly 2-lipped: 

 lobes shorter than the tube. Stamens 4, included: filaments pubescent. Style 

 filiform. Capsule globular. [Gerardia L. in part.] 



Flowers short-pedicelled : corolla-tube over 1 cm. long. 



Corolla over 2 cm. long : larger anthers about 4 mm. long. 1. A. purpurea. 



Corolla less than 2 cm. long : larger anthers about 3 mm. long. 2. A. paupcrciila. 

 Flowers flliform-pedicelled : corolla-tube less than 1 cm. long. 



Corolla rose-purple ; lobes rounded : bracts long. 3. A. tenuifolia. 



Corolla pink; lobes notched: bracts short. 4. A. decewloha. 



1. A. purpurea (L.) Pennell. Stems 2-7 dm. tall, smooth or slightly scabrous: 

 blades of the upper cauline leaves linear, mostly less than 3 mm. wide: calyx- 

 tube 3-4 mm. long; lobes about i as long as the tube: corolla 2-2.5 cm. long: 

 capsules 4—5 mm. long. — Common, on banks and in open woods. — Fall. 



2. A. paupercula (A. Gray) Britton. Stems 1-5 dm. tall, smooth, sometimes 

 with several stiff branches above: leaf -blades linear, scabrous: calyx-tube 3-4 

 mm. long; lobes about i as long as the tube: corolla 1-1.5 cm. long: capsules 

 5-7 mm. long. — M. Common, in the Dillerville swamp, Lancaster. — Lime- 

 stones. — Sum. 



3. A. tenuifolia (Vahl) Raf, Plants darkening in drying: stems 1-6 dm. 

 tall, smooth: leaf -blades linear, smooth or nearly so: calyx-tube campanulate 

 in anthesis, 2-3 mm. long: corolla about 1 cm. long: capsules about 4 mm. 

 long. — N. S. Common, in fields and open woods. — Sandstones and shales, 

 schists. — Fall. 



4. A. decemloba (Greene) Small. Plants not darkening in drying: stems 

 2-7 dm. tall, often scabrous: leaf -blades linear-spatulate: calyx-tube turbinate 

 in anthesis, 2-3 mm. long; lobes minute: corolla about 1 cm. long: capsules 

 3-4 mm. long. — S. Rare, on roadside bank near New Texas. — Schists. — 

 Fall. 



15. BUCHNERA L. Biennial or perennial, erect herbs. Leaf -blades 

 usually toothed. Flowers spicate. Calyx-lobes 5, broad, much shorter than the 

 tube. Corolla blue or white, salverform: tube narrow: limb oblique. Stamens 

 mainly 4, included. Style short. Capsule ovoid. 



1. B. americana L. Stems 3-10 dm. tall, hispid: blades of the stem-leaves 

 oblong to lanceolate, 2-9 cm. long, commonly sharp-toothed: calyx-lobes J to i 

 as long as the tube, the upper ones lanceolate, acuminate: corolla purple; tube 

 villous : capsitle ovoid. — S. Rare, on gravelly banks near Pleasant Grove. — 

 Schists. — Sum. — Blue-heabts. 



16. CASTILLEJA Mutis. Annual or perennial, often partly parasitic 

 herbs. Leaf-blades entire, toothed, or lobed. Flowers spicate or racemose. 



