polemoniacejE. (poi,emoniuii fajult.) 337 



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

 {{le, clustered, or cymose purple or white flowers. 



1. N. Jamaicensis, L. Pubescent; stems prosti-ato, diffusely branched, 

 angled or slightly winged by the deeurrcnt leaves ; leaves spatulate-obovatc, 

 obtuse, tapering inio 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 septicidally into 4 valves, leaving the 2 

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

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



Order 98. POLEMONIACEiE. (Polemonium Family.) 



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

 cymose flowers. — Calyx 5-clefl; or 5-partcd, with membranaceous-mar- 

 gined lobes, imbricated in the bud. Corolla 5-Iobed, 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. 



Synopsis. 



Tribe I. POLKMONIK.^. — 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. 

 Ibibe II. mWETSSlEXi. — Lobes of the corolla imbricated in the bud. Anther-cells 

 opening transversely. 



4. PYXISANTUERA. 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. Stylo 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. 

 5 1 . Stems herbaceous, erect or ascending, 



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

 1 ) ■ lobes of the corolla entire. 



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

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

 29 



