Order 87.— ACANTHACE^. 638 



opposite, solitary or fascicled flowers. Bracts leafy, often stalked. Fls. 

 large, showy, blue or purple. 



1 D. strdpens Nees. Herb erect; Ivs. ovate or obovate-oUong, somewhat repand, 

 euneaie at base and petiolaie, smootkish or thinly downy ; ped. axillary, very short, 

 about 3 (1 to 4)-flowered; bractleta lanoe-oval, equaling or exceeding the calyx; 

 Sep. lance-linear, ciliate, a little shorter than the tube of the loug-fuunel-form corolla. 

 Dry soils, Mid. "W. and S. States, common. Plant variable, 9 to 16' high, oftetk 

 branched, nearly sraootb. Lvs. large, 2 to 3' long, the fls. half or two-thirds as 

 long. Caps, oblanceolate, 6-seeded or by abortion fewer. Hooks grooved. Jn. — 

 Sept. (Ruellia strepens L.) 



2 D. ciliosus Nees. Herb erect, hoary-hirsute ; lvs. ovate, the lower oboVate, 

 upper oblong, all obtusish at apex and abnpt at base, subsessile; fls. subsessile, 

 with oblong or lanceolate bracts not longer than calyx ; sep. setaceous, hairy, not 

 half as long as the long tube of the corolla. — Eich soils W. and S. States. Plant If 

 or more high. Lvs. 18 to 30" long, the fls. nearly as long. A variety has smaller 

 leaves almost dentate. (Ruellia ciliosa Ph.) 



ji. HYBRiDus. Low, decumbent, very hirsute. — ^Near Savannah (Peay). Stems 

 2 to 4' long, with short internodes. Fls. sometimes shortened. 



3 D. noctifldrus Neea. — GaL segm. linear-lanceolate, thrice shorter than the very 

 long corolla tube. Otherwise as in D. cihosus. — Ga. (near Savannah, Le Conte) 

 and Fla.' (Ruellia tubiflora Le Conte.) 



5. CRYPHIACAN'THUS, Nees. (Gr. Kpy<piog, clandestine, aKavdog.) 

 Calyx deeply 5-parted, spreading in fruit ; corolla bcli-funnel-fom), 

 limb equal ; stamens 4, included ; antters sagittate ; stigma simple ; 

 capsule oblong, terete, 12 to 16-seeded from the base ; seeds roundish, 

 cordate, comprcs,sed, silky, subtended with hooks. — Herbs villous, with 

 corm-like base and fasciculate roots. Ped. 3-fiowered. 



C. Barbadense Nees. Caulescent; lvs. ovate, cuneate at base and petiolate, 

 entire or undulate-deutate, smoothish or hairy ; ped. somewhat cymous, longer 

 than the petiole or even than the leaves ; cal. segm. subulate-acuminate, glandu- 

 lar, hirsute ; cor. tube shorter than the limb. — li A low, leafy plant, Va. to Pla., 

 Tex. Mex. &c. (Nees). (Ruellia tuberosa and clandestina L.) 



6. HYGROPH'ILA, R. Br. (Gr. vyprj, waters, (piXeu, to love.) 

 Calyx tubular, about half 5-cleft, with narrow, equal segments ; corolla 

 bilabiate, ringent, lower lip convex and rugulous in the midst, trifid ; 

 stamens 4, didynamous, not exserted ; anther cells divergent-sagittate, 

 violet-colored ; stigma simple, subulate ; capsule 6-striate, Go-seeded 

 from the base ; seeds small. — Herbs in swamps, &c., stoloniferous, 

 4-angled. Fls. clustered in the axils. 



H. lacustris Nees. ' Erect, subsimplo, minutely pubescent ; Irs. lanceolate, 

 narrowed to both ends, sessile, subentire ; verticils many-iiowered ; cal. smooth- 

 ish. — Borders of lakes near N. Orleans. (Hale). Stems 1 to 2f high above the 

 water, very straight and simple. Ha. white. (Ruellia justiciaeflora Hook.) 



7. DICLIP'TERA, Juss. (Gr. A?-, double, kXe/gj, to shut; referring 

 to the 2-valved capsule.) Calyx 5-parted, equal, sessile, in a bracted 

 head ; corolla resupinate, bilabiate, upper lip 3-toothed ; stamens 2 ; 

 anther cells straight, placed one above the other ; capsule 4-seeded ; 

 dissepiment and walls separating from the back of the valves and curv- 

 ing upwards ; seeds discoid, on hooks. — Herbs with the small flowers 

 in axillary, involucrate, finally terminal heads. 



D. bracbiata Spr. St. 6-angled, brachiate-branched, glabrous ; lvs. ovate-oblong, 

 subentire, obtusely acuminate, contracted at base to a long petiole; lids, few- 

 flowered, sessile or the lower on a leafy peduncle, the upper at length spicate ; 

 involucrate lvs. very unequal ; capsule oval the valves first curving backwards, 



