GENUS I. 



PHLOX FAMILY. 



53 



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. 



5. Polemonium. 



6. Collomla. 



7. Naverretia. 



i. PHLOX L. Sp. PI. 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 obovate, orbicular or obcordate, spreading. 

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

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

 length distending and rupturing the calyx-tube. Seeds usually only i in each cavity of the 

 capsule, ovoid, wingless or narrowly winged, not emitting spiral threads when wetted. 

 [Greek, flame.] 



About 40 species, natives of North America and Russian Asia, many of them widely cultivated. 

 Besides the following, some 24 others occur in the southern and western parts of North America. 

 Type species : Phlox glaberrima L. 

 Leaves flat, ovate, oblong, lanceolate or linear. 



Cymes panicled ; flowers short-pedicelled or sessile. 

 Calyx-teeth subulate. 



Stem glabrous or puberulent ; leaves lanceolate to oblong. i. P. paniculata. 



Stem villous, glandular above ; leaves ovate to ovate-lanceolate. 2. P. amplifolia. 



Calyx-teeth lanceolate, acute ; leaves lanceolate or ovate, acuminate. 3. P. maculata. 



Cymes corymbose, simple, or flowers scattered. 

 Flowering stems erect or ascending, simple. 

 Plants glabrous or nearly so. 



Leaves ovate or oblong ; calyx-teeth acute. 4. P. ovata. 



Leaves lanceolate or linear ; calyx-teeth subulate-lanceolate. 5. P. glaberrima. 



Plants pubescent, hirsute or villous. 



Stems erect or ascending ; no prostrate sterile shoots. 



Leaves linear or lanceolate, acuminate, spreading. 6. P. pilosci. 



Leaves linear-oblong, acute or obtuse, nearly erect. 7. P. amoena. 



Stems ascending or reclining ; sterile shoots prostrate. 



Lower leaves and those of the sterile shoots oblong or ovate. 8. P. divaricata. 



Lower leaves and those of the sterile shoots obovate. 9. P. stolonifera, 



Stems diffusely branched, usually creeping ; leaves narrow. 



Corolla-lobes cleft to or about the middle. 10. P. bifida. 



Corolla-lobes cleft only at the apex. 1 1. P. Stcllaria. 



Corolla-lobes rounded; western. 12. P.Kelseyi. 



Leaves subulate, fascicled or crowded ; plants low. 



Stems creeping or ascending ; flowers cymose ; eastern. 



Corolla-lobes shallowly emarginate; plant not glandular. 13. P.subulata. 



Corolla-lobes deeply emarginate; upper part of plant glandular. 14. P.Brittonii. 



Densely tufted ; flowers mostly solitary ; western. 



Leaves densely white-woolly, i" long; plant moss-like. IS- P.bryoides. 



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



Corolla-tube shorter than or equalling the calyx. 16. P.Hoodn. 



Corolla-tube longer than the calyx. 17- P.Douglasn. 



i. Phlox paniculata L. Garden Phlox. 

 Fig. 3454- 



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 to oblong-lanceo- 

 late, acute or acuminate at the apex, narrowed at the 

 base, or the uppermost subcordate, 2-6' long, i'-ii' 

 wide ; flowers short-pedicelled in compact paniculate 

 cymules, the inflorescence 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 calyx-tube. 



In woods and thickets, Pennsylvania to Florida, Illinois, 

 Kansas and Louisiana. Freely escaped from gardens in 

 the north and east. Consists of many races, differing in 

 leaf-form, size and color of flowers, and in pubescence. 

 July-Sept. 



