32 



POLEMONIACEAE. 



[Vol. III. 



Calyx not distended nor ruptured by the capsule; leaves alternate. 

 Calyx -teeth herbaceous, not spinulose-tipped. 

 Stamens declined; leaves pinnate. 

 Stamens straight and leaves entire in our species. 

 Calyx-teeth spinulose-tipped; leaves pinnatifid. 



3. Polemonium. 



4. Collomia. 



5. Naverrelia. 



I. PHLOX L. Sp. PL 151. 1753. 



Perennial or rarely annual, erect or diffuse herbs, with opposite entire leaves, or some of 

 the upper ones alternate, and large blue purple red or white flowers, in terminal cymes or 

 cymose panicles. Calyx tubular or tubular-campanulate, 5-ribbed, 5-cleft, the lobes acute or 

 acuminate, mostly scarious- margined and the sinuses commonly scarious. Corolla salver- 

 form, the tube narrow, the limb 5-lobed; lobes obovale, orbicular or obcordate, spreading. 

 Stamens straight, short, unequally inserted on the corolla-tube. Ovary oblong or ovoid, 3- 

 cclled; style usually slender; ovules 1-4 in each cavity. Capsule ovoid, 3-valved, at length 

 distending and rupturing the calyx-tube. Seeds ovoid, wingless or narrowly winged, not 

 emitting spiral threads when wetted. [Greek, flame.] 



About 30 species, natives of North America and Russian Asia. Besides the following^ some 

 14 others occur in the southern and western parts of North America. 



Leaves flat, ovate, oblongr, lanceolate or linear. 



Cymes panickd; flowers short-pedicelled or sessile. 



Caly-xteeth subulate; leaves oblong, oblong-lanceolate or ovate-lanceolate. 



I. P. panicnlala. 

 Calyx-teeth lanceolate, acute; leaves lanceolate or ovate, acuminate. 2. P. maculala. 

 Cymes corymbose, simple, or flowers scattered. 

 Flowering stems erect or ascending, simple. 

 Plants glabrous or nearly so. 



Leaves ovate or oblong: calyx-teeth acute. 3. P. oz'ala. 



Leaves lanceolate or linear; calyx-teeth subulate-lanceolate. 4. P. glaberrima. 



Plants pubescent, hirsute or villous. 



Stems erect or ascending; no prostrate sterile shoots. 

 Leaves linear or lanceolate, acuminate, spreading. 

 Leaves linear-oblong, acute or obtuse, nearly erect. 

 Stems ascending or reclining: sterile shoots prostrate. 



Lower leaves and those of the sterile shoots oblong or ovate. 

 Lower leaves and those of the sterile shoots obovate. 

 Stems diffusely branched, usually creeping: leaves narrow. 

 Corolla-lobes cleft to or about the middle. 

 Corolla-lobes cleft only at the apex. 

 Corolla-lobes rounded; western. 

 Leaves subulate, fascicled or crowded; plants low. 



Stems creeping or ascending: flowers cymose; eastern. 

 Densely tufted; flowers mostly solitary: western. 



Leaves densely white-woolly, 1" long; plant moss-like. 

 Leaves less woolly or merely ciliate, 2"-6" long. 



Corolla-tube shorter than or equalling the calyx. 14. P. Hoodii. 



Corolla- tube longer than the calyx • 15. /". Douglasii. 



5. P. pilosa. 



6. P. amoena. 



7. P. divaricata. 



8. P. repians. 



9. P. bifida. 



10. P. Slellaria. 



11. P. Kelseyi. 



12. P. subtilala. 

 P. bryoides. 



13- 





I. Phlox paniculata 1,. Garden 

 Phlox. (Fig. 2968.) 



Phlox paniculata L. Sp. PI. 151. 1753. 



Stem erect, stout or slender, simple or 

 branched above, glabrous or puberulent, 2°- 

 6° high. Leaves thin, sessile or short-petioled, 

 oblong, oblong-lanceolate or ovate-lanceolate, 

 acute or acuminate at the apex, narrowed at 

 the base, or the uppenuost subcordate, 2'-6' 

 long, y^'-iYx' wide; flowers short-pedicelled 

 in compact paniculate cymules, the inflores- 

 cence often 12' long; calyx-teeth subulate, 

 glabrous, puberulent or glandular, more than 

 one-half as long as the tube; corolla pink, 

 purple or white, its lobes broadly obovate, 

 rounded, entire, shorter than its tube; capsule 

 oval, obtuse, slightly longer than the ruptured 

 calj'x-tube. 



In woods and thickets, Pennsylvania to Florida, 

 west to Illinois and Louisiana, Freely escaped 

 from gardens in the north and east. July-Sept. 



