200 KEY AND FLORA 



I. PHLOX L. 



Perennial or rarely annual herbs ; stems erect or diffuse. 

 Leaves opposite, or the upper alternate, entire, without 

 stipules. Flowers showy, white or purple, in terminal cymes 

 or panicles. Calyx cylindrical or funnelform," 5-cleft, the 

 lobes acute. Corolla salver-form, the tube long and slender, 

 the limb 5-parted, the lobes spreading, entire or obcordate. 

 Stamens included, unequal. Ovary 3-celled, style slender. 

 Capsule ovoid, 3-celled, 1-few-seeded ; seeds wingless or nar- 

 row-winged.* 



1. P. paniculata L. Garden Phlox. Perennial; stems in clumps, 

 stout, erect, simple or branched above, 2-4 ft. high. Leaves ovate- 

 lanceolate to oblong, taper-pointed at the apex, rounded or cordate at 

 the base, thin, smooth ; veins prominent beneath. Cymes numerous 

 and compact, forming a pyramidal panicle; pedicels short. Calyx 

 teeth long, bristle-pointed. Corolla purple to white ; lobes round- 

 obovate, shorter than the tube. Capsule longer than the calyx tube. 

 In rich woods ; often cultivated.* 



2. P. maculata L. Wild Sweet William. Stem erect, smooth 

 . or nearly so, rather slender, purple-spotted, 1-2 ft. high. Lower 



leaves lanceolate, the upper ones broader, taper-pointed, roundish 

 or heart-shaped at the base. Panicle many-flowered, narrow, ellip- 

 soidal. Calyx teeth lanceolate, hardly acute. Flowers purple, occa^ 

 sionally white. Damp woods and fields. 



3. P. glaberrima L. Smooth Phlox. Stems smooth, slender, 

 erect, 1-3 ft. high. Leaves narrowly lanceolate or linear, lj-4 in. 

 long, smooth except the rough and sometimes recurved margins. 

 Cymes few-flowered, grouped in loose corymbs. Calyx teeth very 

 narrow and sharp-pointed. Corolla pink or whitish, lobes longer than 

 the tube. Prairies and open woods. 



4. P. pilosa L. Downy Phlox. Perennial ; stem erect, slender, 

 simple or branched, 1-2 ft. high. Leaves linear-lanceolate to linear, 

 distant, spreading, long, taper-pointed, sessile ; stem and leaves downy. 

 Cymes corymbose, loose. Flowers short-pediceled. Calyx glandular- 

 viscid, the teeth shorter than the tube of the purple corolla, bristle- 

 pointed. Corolla tube downy, lobes ' obovate. Capsule twice the 

 length of the calyx tube. In dry, open woods.* 



5. P. divaricata L. Wild Blue Phlox. Perennial ; stems erect 

 or ascending from a decumbent base, sticky-downy, 1 ft. high. 

 Leaves distant, lanceolate to oblong, acute at the apex, rounded at 

 the base, sessile, downy. Cymes corymbed, loosely flowered. Calyx 

 teeth awl-shaped, longer than the tube. Corolla bluish-purple, ^| 



