POLEM ON I A LEA E. 757 



5-Iobed; lobes obovate, orbicular or obcordate, spreading. Stamens straight, short, 

 unequally inserted on the corolla-tube. Ovary 3-celled; style usually slender; 

 ovules 1-4 in each cavity. Capsule ovoid, 3-valved at length distending and rup- 

 turing the calyx-tube. Seeds ovoid, not emitting spiral threads when wetted. 

 [Greek, flame.] About 30 species, natives of N. Am. and Asia. Besides the fol- 

 lowing, some 24 others occur in southern and western N. Am. 



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. 



1. P. paniculata. 

 Stem villous, very glandular above; leaves ovate to ovate-lanceolate. 



2. P. ampli/olia. 

 Calyx-teeth lanceolate, acute ; leaves lanceolate to 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. pilosa. 

 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. reptans. 

 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. 11. P. Stellarta, 



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, 2 mm. long; plant moss-like. 15. P. bryoides. 

 Leaves less woolly or merely ciliate, 4-12 mm. long. 



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



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



1. Phlox paniculata L. Garden Phlox. (I. F. f. 2968.) Stem glabrous 

 or puberulent, 6-18 dm. high. Leaves sessile or short-petioled, oblong to oblong- 

 lanceolate, acute or acuminate, 5-15 cm. long; flowers in compact paniculate 

 cy mules, the inflorescence often 3 dm. long; calyx-teeth more than one-half as long 

 as the tube; corolla pink, purple or white, its lobes broadly obovate, rounded, shorter 

 than its tube; capsule oval, obtuse. In woods and thickets, Penn. to Fla., 111., 

 Kans. and La. Freely escaped from gardens in the north and east. July-Sept. 



2. Phlox amplifdlia Britton, n. sp. Large-leaved Phlox. Stem vil- 

 lous or glandular- villous, at least above, 6-12 dm. tall. Leaves large and broad, 

 7-15 cm. long, 3-6 cm. wide, roughish above, the upper sessile, the lower or some 

 of them narrowed, usually abruptly, into winged petioles, sometimes one-third the 

 length of the blade; flowers similar to those of the preceding; calyx glandular- 

 villous; corolla-tube glabrous. Term, to Mo. Aug. -Sept. Type from Knox Co. . 

 Tenn. 



3. Phlox maculata L. Wild Sweet-william. (I. F. f. 2969.) Stem 

 glabrous or puberulent, usually flecked with purple, 3-9 dm. high. Leaves lance- 

 olate or the upper ovate- lanceolate, glabrous, rather firm, long-acuminate, sessile, 

 rounded or subcordate at the base. 5-12 cm. long; flowers short-pedicelled, the 

 compact cy mules forming an elongated narrow panicle; calyx-teeth acute, or acu- 



