438 XCVI. POLEMONIACEJE. PHLOX. 



4. PHACELIA. 



Gr. ^a/fcXof, a bundle or fascicle ; alluding to the fasciculate racemes. 



Calyx 5 parted ; cor. tubular-campanulate, caducous, 5-lobed, tube 

 within furnished with 5 melliferous grooves ; sta. 5, mostly exserted ; 

 ova. 1 -celled, hispid; sty. bifid; caps, ovoid, 2-valved, valves placen- 

 tiferous in the middle ; seeds 4. American herbs, hispid, with alter- 

 nate Ivs., and loose or dense, one-sided racemes. 



P. BIPINNATIF1DA. Michx. 



Hairy, suberect; Ivs. incisely pinnatifid, long-petiolate, lateral segments 

 3 4, incisely lobed and toothed, terminal trifid ; roc. elongated, bifid or sub- 

 paniculate ; cor. lobes entire, twice longer than the calyx, shorter than the 

 stamens. Tj. or (g) Woods and hill sides, Penn. to Ohio ! and la. ! Plant 

 sometimes nearly smooth, 1 2f high, bearing several leafless racemes at top. 

 Leaves 3 6' long, including the petiole. Corolla 6" broad, blue, the grooves 

 bordered with narrow, pubescent margins. May, Jn. 



/?. Plummeri. St. ferruginous-hirsute ; fls. much smaller ; cor. scarcely longer 

 than the calyx. Richmond, la. Plummer ! 



ORDER XCVI . POLEMONIACEJE. PHLOXWORTS. 



Herbs, with opposite, occasionally alternate, compound or simple leaves. 



Cal. 5 united sepals, inferior, persistent, sometimes irregular. 



Cor. 5 united petals, regular, the lobes imbricate or twisted in aestivation. 



Sta. 5, inserted into the midst 9f the corolla tube and alternate with its lobes. 



Ova. 3-celled, free. Styles united into 1. Stigma trifid. 



Caps. 3-celled, 3-valved, loculicidal, valves also separating from the 3-cornered axis. 



Sds. few or many. Albumen horny. Embryo foliaceous. 



Genera 17, species 104, chiefly North American. They are valued only in cultivation as ornamental 

 plants. 



Conspectus of the Genera. 



(. hypocraterifbrm. Phlox. 1 



< infundibuliform. Gilia. 2 



Corolla ( campanulate. Polemonium. 3 



1. PHLOX. 



Gr. foot-, aflame ; from the color and profusion of the flowers. 



Calyx prismatic, deeply 5-cleft ; corolla hypocrateriform, the tube 

 more or less curved ; stamens very unequal, inserted in the tube of 

 the corolla above the middle ; capsule 3-celled, cells 1 -seeded. A 

 highly ornamental, North American genus. Lvs. mostly opposite, sessile, 

 simple, entire. Fls. in terminal corymbs or panicles. 



1. P. PANICULATA. Panicled Phlox or Lychnidea. 



St. glabrous, erect ; Ivs. glabrous, oblong or ovate-lanceolate, acuminate 

 at each end, rough-edged, flat ; corymbs paniculate, subpyramidal, many-flow- 

 ered ; col. teeth setaceous-acuminate, shorter than the tube ; pet. roundish, obovate, 

 entire. 1\. This well-known favorite of gardens is found native in woods and on 

 river banks, Western States ! to Penn. and Car. It flourishes in rich, moist 

 soil, or in leaf- mould or peat. Stem 2 3f high, ending in a large, oblong- 

 pyramidal panicle of innumerable pink-colored, scentless flowers. Leaves 3 

 5' by 9 16", lower ones distinctly petioled, the highest sometimes subcordate 

 at base. July Sept. f 



2. P. ACUMINATA. Ph. Acuminate Lychnidea. 



St. erect, paniculate, branching above; Ivs. oblong or ovate-lanceolate, 

 acuminate, the upper ones subcordate at base, all pubescent beneath, as well as 

 the stem ; panicle pyramidal-corymbose, many-flowered ; cal. teeth briefly seta- 

 ceous-acuminate. % This species', whose numerous varieties are common in 

 gardens, is a native of Mo., Ky. and 111. Although distinguishable at sight 

 from P. paniculata, being stouter and rougher, its chief technical distinction is 

 its pubescence and shorter calyx teeth. Petals rounded at the end, light purple, 

 varying to deep purple and red. June Aug. f 



