rOLEJIONIACE^. (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 dccurrcnt leaves ; leaves spatulate-obovatc, 

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

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

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

 placentae free. — South Florida. — Stem 12'- 18' long. Leaves i'-l' long. 

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



Order 98. POLE3IONIACE^. (Polemoxium Family.) 



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

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

 gined lobes, imbricated in tlie 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 ampbitropous ovules attached to the cen- 

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

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

 dons leafy. Radicle inferior. 



Synopsis. 



Tribe I. POLEMOJVIE.^. —Lobes of the corolla convolute ia 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. DIAPE1VSIE.;E. — Lobes of the corolla imbricated in the bud. Anther-cells 

 opening transversely. 



4. PYXIDANTIIERA. 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, l-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 atvn-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 ; cvmes numerous, 

 29 



