POLEMONIACE^E. (POLEMONIUM FAMILY.) 337 



Diffuse, hairy herbs, with alternate, entire leaves, and axillary and terminal sin- 

 gle, clustered, or cymose purple or white flowers. 



1. N. Jamaicensis, L. Pubescent; stems prostrate, diffusely branched, 

 angled or slightly winged by the decurrcnt leaves ; leaves spatulate-obovate, 

 obtuse, tapering into a petiole ; flowers solitary or 2 - 3 together, short-pedtm- 

 cled ; calyx-lobes linear, ciliate, as long as the corolla ; capsule oblong, splitting 

 loculicidally into 2 valves, and at length septicidally into 4 valves, leaving the 2 

 placenta? free. South Florida. Stem 12' -18' long. Leaves '-!' long. 

 Corolla small, purple, ciliate. Capsule 4-angled, smooth. 



ORDER 98. POLEMONIACEJE. (POLEMONIUM FAMILY.) 



Chiefly herbs, with opposite or alternate leaves, and regular solitary or 

 cymose flowers. Calyx 5-cleft or 5-parted, with rnembranaceous-mar- 

 gined lobes, imbricated in the bud. Corolla 5-lobed, convolute or (in No. 

 4) imbricated in the bud. Stamens 5, inserted on the tube of the corolla. 

 Ovary 3-celled, with 3 - many amphitropous ovules attached to the cen- 

 tral placenta. Style 3-cleft. Capsule 3-celled, loculicidally 3-valved. 

 Seeds angular. Embryo straight in the axis of copious albumen. Cotyle- 

 dons leafy. Radicle inferior. *t 



Synopsis. 



TRIBE I. POLEMONIE^E. Lobes of the corolla convolute in the bud. Anther-cells 

 parallel, opening lengthwise. 



1. PHLOX. Corolla salver-form. Filaments unequally inserted on the tube. Leaves entire. 



2. GILIA. Corolla tubular-funnel-shaped. Filaments equally inserted near the throat of the 



corolla. Leaves pinnately divided. 



3. POLEMONIUM. Corolla short-bell-shaped. Filaments inserted on the throat of the co- 



rolla. Leaves pinnate. 



TRIBE II. DIAPEJVSIEJE. Lobes of the corolla imbricated in the bud. Anther-cells 

 opening transversely. 



4. PYXIDANTHERA. Anther-cells awned at the base. Leaves entire. Flowers solitary. 



1. PHLOX, L. 



Calyx cylindrical or bell-shaped, 5-cleft. Corolla salver-form, with a long and 

 slender tube, and obovate or roundish lobes. Stamens 5, included, unequally 

 inserted on the tube. Style filiform. Ovules solitary in the cells. Capsule 

 ovoid, 1 -3-seeded; the valves at length separating from the central placenta. 

 Seeds erect. Mostly perennial herbs, with opposite or (the upper) alternate 

 entire leaves, and showy purple or white flowers in terminal panicled cymes. 



1. Stems herbaceous, erect or ascending. 

 * Style long, filiform: calyx-teeth lanceolate-subulate, not awn-pointed (except in No. 



1 ) ; lobes of the corolla entire. 



1. P. paniculata, L. Smooth; stem tall, branched above; leaves ovate- 

 lanceolate, acute or acuminate, the upper ones often cordate ; cymes numerous, 

 29 



