ORDER 92. POLEMONIACE^E. 567 



centse 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; Ivs. sessile, 

 lance-ovate; branchkts corymbed, each bearing a terminal flower ; sep. lanceolate. 

 acute, hispid ; cor. thrice longer than the calyx ; caps, roundish-ovoid, glabrous. 



U Ponds in pine barrens, Ga. and S. Car. (Bachman). Sts. 1 to2f high. Lvs. 

 1' to 18'' long, with 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. quadrivalva Walt. Spiny, more or less hispid ; Ivs. lanceolate, petiolate, 

 very acute at both ends, entire ; cymes 4 to ^-flowered, axiUary, upper sessile, 

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

 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, 5 to 6" broad. 

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



3 H. ovata Xutt. With ovate-acuminate Ivs. and terminal clusters is found in W. 

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



ORDER XCIL POLEMONIACILE. PHLOXWORTS. 



Herbs 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-celled, 3-valved, loculicidal. Seeds few or many, albumin- 

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



Genera 17, species 104, chiefly N. American. They are valued and cultivated only as orna- 

 mental plants. 



TRIBES AND GENERA. 

 I. POLEMONrELE. Sepals united at base. Lobes of the corolla convolute in bud. (a) 



a Corolla salver-forni. Filaments unequal. Leaves entire ................ PHLOX. 1 



a Corolla bell-form. Filaments equal. Leaves pinnate .................... POLEMONITOI. 2 



a Corolla funnel-form. Filaments equal. (Leaves pinnately dissected) ..... GILIA. 8 



II. DIAPENSIE^E. Sepals distinct, oval. Lobes of corolla imbricated ........ DIAPENSIA. 4 



1. PHLOX, L. PHLOX. LYCHNIDIA. (Gr. 0/l6, 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 the 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, 3 



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



2 Plants glabrous. Calyx teeth shorter than its tubes .................... Nos. 3, 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, /3., 9 



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



' Leaves imbricated .................. No. 11 



1 P. paniculata L. Glabrous, erect ; Ivs. oblong or ovate-lanceolate, acuminate 

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

 subpyramidal, many-flowered ; cal. teeth setaceous-acuminate, nearly as tong as the 

 tube; pet. rouudish-obovate, entire. U 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 5' by 9 to 16", lower ones distinctly petioled. Cor. tube a little curved, 12 to 

 15" long. JL Sept. f 



