3G4 ACAXTHACK.E. (A(JA NTH IS FA.MILV.) 



the lajisulo, w itlnnit appciKiagos. — Lnw licrlts. Lc;v\ cs all railical, c-lustered. 

 Sca|)e lovcTcil with Jilleniale iiubriculcd hnicts. Flowers «j)ikeii, 2-brai'ted. 



1. E. virgata, Michx. Leaves oval t»r oblong, narrowed downward; 

 bracts rii,'id, lanceolate, acuminate, cla.«'i)ing; corolla white, salver-shaped, the 

 hibes nearly ei|iial ; caj)8ule cvlindrical. — Low ground, Florida to South Car- 

 olina. August. ^ — Scapes 6' -12' high. Leaves 2' -4' long. Spikes 

 rarely clustered. 



2. HYGROPHILA, H. 15r. 



Calyx cijnally 4-cleft. Corolla I'-lipped, the lower lij) .Mobed. Stamens 4, 

 diilynamous: anther cells itarallel, s])reading at the base. Stigma simple. 

 Capsule narrow, nearly terete, bearing the numerous orbicular seeds at its 

 base. — A(iuatic herbs. Flowers axillary, in cymose clusters. 



I. H. lacustris, S'ees. stem long (2° -4°), erect from a procumbent 

 base, 4-aiiiilcil ; leaves sessile, lanceolate ; cymes ojjposite, few-Howered ; calyx 

 smooth ; Howers white. — .Muddy l)aiiks of rivers, Florida, and westward. 



3. RUELLIA, J'luMi. 



Calyx 2-bracted, 5-parted, with linear or bristle-like lobes. Corolla funuel- 

 shaped, 5-lobed ; the lol)es c<nial, rounded. Stamens 4, didyuamous, included : 

 anthers sagittate. Style simjde, or 2-cleft at the apex. Cap.sule narrowed 

 below the middle, flattened contrary to the partition, 8-12-seeded. Seeds 

 borne above the middle, supported by curved apj)endages of the placentae. — 

 Perennial herbs, with tumid joints, entire opposite leaves, and axillary soli- 

 tary or clustered nearly sessile flowers. Corolla white, blue, or purple, 

 uocturnal. 



1. R. Ciliosa, I'ursh. Stem simple or branched, jmbcscent, 1°- 2° high; 

 leaves sessile or short-petioled, ovate, oblong, or wedge-shajied, denticulate or 

 entire, I'-S' long, long-ciliate ; flowers single or clu.stered ; calyx lobes fili- 

 form or setaceous, ciliate, mostly shorter than the tube of the corolla. — Dry 

 soil. March-Sept. — Corolla blue, l'-2' long. — Very varialde ; the ex- 

 tremes are a low (1'- 12' iiigh) villous form of the lower districts, with obovate 

 or wedge-sha])ed obtuse sessile leaves, and a taller and smoother mountain 

 form, with larger (3'- 5' long) ovate-oblong short-petioled leaves, resembling 

 the next. 



2. R. Strepens, L. Stem smooth or paberulent, I'-S" high, leaves ob- 

 long or ovate-oldong, short-petioled, .3'- G' long ; earliest flowers single, with 

 a large (2' long) blue corolla, the later cleistogamous, clustered; calyx lobes 

 linear-lanceolate, mostly shorter than the tube of the corolla. — Dry soil chiefly 

 in the upper districts. May -Sept. 



3. R. noctiflora, Oray. Closely pubescent ; stem simjile. rigid ; leaves 

 oblong or lanceolate, sessile, entire or slightly toothed ; Howlers solitary, ])cdnn- 

 cled ; corolla large ; the elongated tube twice as long as the linear hairy calyx 

 lobes ; capsule pubescent. — Low grassy pine barrens, Florida, Georgia, and 

 westward. Jnlv - Ancjnst. — Stem 1° high. Corolla 2' -4' long, white. 



