Order 92.— POLEMONIAOB^.- .667 



centsc axial, borne on each surface of the free, false dissepiment, seeds 

 many. — Herbs with alternate, undivided Ivs., and axillary or terminal 

 cymes of blue fls. 



1 H. corymbosa Macbride. Unarmed, sparingly hirsute above; Its. sessile, 

 lance-ovate; bj-anchkis corymbed, eaeh bearing a terminal JUniier ; sep. lanceolate, 

 acute, hispid ; cor. thrico longer tlian the calyx ; caps, roundish-ovoid, glabrous. 



— y Ponds in pine barrens, Ga. and S. Car. (Bachman). Sts. 1 to 2f high. Lvs, 

 1' to 18" long, witli downy veins and margins. Fls, showy, nearly bell-shaped, 

 1' broad, " azure with yellowish veins and 5 white spots near the base," (Elliott.) 

 Jn. — Aug. 



2 H. quadrivdlva "Walt. Spiny, more or less hispid ; lvs. lanceolate, petiolate, 

 very acute at both ends, entire ; cym^s 4 to G-flowered, axillary, upper sessile, 

 lower pedunculate ; sepals ovate, acuminate, a little shorter than the corolla.-;^ 

 In stagnant waters, S. Car., Ga. to La. St. 2f high. Spines straight, slender, 

 axillary, 3 to 5" long. Lvs. 2 to 3' long. Cor. azure blue, 6 to 6" broad. 

 Caps; as large as a pea, with numerous minute seeds. Jl. — Sept. , 



3 H. ovdta Nutt. With ovate-acuminate lvs. and terminal clusters is found in W. 

 La. and Ark., probably not native within our limits. Barely seen in gardens. 



Order XCII. POLEMONIACE^. Phloxworts. 



Serbs with alternate or opposite leaves and 5-parted, regular, showy flowers. 

 Corolla monopetalous, the lobes convolute, rarely imbricate in aestivation. Sta- 

 mens 5, adherent to the corolla tube, and alternate with its lobes. Ovary 3-celled, 

 stigma 3-cleft ; capsule 3-oelled, 3-valved, loculicidal. Seeds few or many, albumin- 

 ous, attached to a permanent columella. (Illustr. in Kg. 301.) 



Genera IT, species 104, chiefly N. American. They are valued aad cultivated only aa orna- 

 mental plants. 



TRIBES AND GENERA, 

 t. POLEMONIE.*;. Sepals united at base. Lobes of the corolla convolute in bud. (a) 



a Corolla salver-form. Filaments unequal. Leaves entire Phlox, 1 



a Corolla bell-form. Filaments equal. Leaves pinnate Polkmonium. 3 



a Corolla funnel-form. Filaments equal, (Leaves pinnately dissected) Gilia, 3 



H. DIAPENSIE,^, Sepals distinct, oval. Lobes of corolla imbricated Diapensia, 4 



1. PHLOX, L. Phlox. Ltchnidia. (Gr. <pX6^, a flower; from 

 the color and profusion of the flowers.) Calyx prismatic, deeply 5-cleft ; 

 corolla salver-form, the tube more or less curved ; stamens very un- 

 equally inserted in tlie tube of the corolla above the middle ; capsule 

 3-celled, cells each 1-seeded. — A highly ornamental, North American 

 genus. Lvs. mostly opposite, sessile, simple, entire. Fls. in, terminal, 

 cymes, corymbed or panicled. (Fig. 301.) 



♦ Lobes of the corolla rounded and entire at the end. (1) 



1 Panicle of cymes oblong or pyramidal, many-flowered Nos, 1, 2 



1 Panicle of cymes corymbed, level-topped, flowers fewer. (2) 



2 Plants glabrous. Calyx teeth shorter than its tubes Nos, S, 4 



2 Plants hairy. Calyx teeth attenuated, longer than the tube, (3) 



3 Leaves narrow, linear or nearly so Nos, 5, 6 



3 Leaves broad, ovate or lanceolate, etc Nos, 7, 8, p., 9 



* Lobes of corolla notched or bifid at the end, — Leaves distant Nos. 8, 10 



— Leaves imbricated No, H 



1 P. panicuiata L. Glabrous, erect ; lvs. oblong or ovate-lanceolate, acuminate 

 at each end, or the upper abrupt at base, rough-edged, flat ; corymbs paniculate, 

 Hubpyramidal, many -flowered ; cal. teeth setaceoas-acuminate, nearly as long as the 

 tube ; pet. rouudish-obovate, entire. — 2f This favorite is found native in woods 

 and river banks, W. States to Penn. and Car. St. 2 to 3f high, ending in a large, 

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

 to 6' by 9 to 16", lower ones distinctly petioled. Cor. tube a little curved, 12 to 

 15" long, JL— Sept f 



