HEMIANTHUS. . XCI. SCROPHULARIACE^E. 403 



13. GRATIC-LA. 



Lat. gratia, iavor : alluding to its medicinal virtues. 



Calyx 5-parted, subequal ; cor. upper lip entire or slightly bifid, 

 lower trifid, the palate not prominent ; sta. 2, fertile, mostly with 3 

 sterile filaments ; caps. 2-celled, 4-valved, valves infiexed at margin. 

 Herbs with opposite Ivs. . Ped. axillary, l-Jlowered, usually bibracteo- 

 late near the calyx. 



1. G. AUREA. Muhl. Golden Hedge Hyssop. 



Smooth ; Ivs. oblong-lanceolate, subentire, half-clasping ; sterile fil. 2, mi- 

 nute. A small, perennial herb, 6 8' high, frequenting the borders of muddy 

 ponds and other moist places, Mass. ! N. Y. ! to Flor. Stem declining and 

 rooting at the base, quadrangular, simple or branching. Leaves opposite, ses- 

 sile, a little clasping, smooth, punctate, acute or nearly so, often with a few 

 teeth near the end. Flowers yellow, axillary, alternate, on slender stalks, as 

 long as the leaves. Filaments 4, adhering to the corolla, 2 of them minute, 

 without anthers. Aug. 



2. G. VIRGINICA. (G. aurea. Ph. G. Missouriana. Deck. G. officinalis. 

 MX.) St. ascending, branched; Ivs. lanceolate, subacute ; ped. as long or 



longer than the leaves ; sterile fil. none. -7J. U. S. and Can. Stem 4 8' high, 

 more or less pubescent, round, declining and branching at base. Leaves 1 2' 

 long, and as wide, smooth, lanceolate, sessile, dentate or nearly entire near 

 the ends, subconnate or amplexicaul. Corolla white or pale-yellow, pubescent 

 within, twice as long as the calyx, and on long, pubescent stalks. " Calyx with 

 5 equal segments, and 2 bracts which are linear-lanceolate and rather longer 

 than the sepals. July. 



3. G. SPH;EROCARPA. Ell. (G. Carol iniensis. Le Conte.} Round-fruited 

 Hedge Hyssop. Glabrous, ascending, branched; Ivs. lanceolate-ovate, 



attenuate to the base, sparingly toothed ; ped. scarcely longer than the calyx. 

 Low grounds, Western States ! to Ga. Plant a few inches high, differing from 

 the last chiefly in the short peduncles, round capsules, broader leaves, &c. 

 Flowers whitish, 5 6" long. June. 



14. ILYSANTHUS. Rafinesque. 



Gr. tXvj, mud, avSos, flower; from the habitat of the plants. 



Calyx 5-parted ; cor. upper lip short, erect, bifid, lower lip larger, 

 spreading, trifid ; sta. 2 fertile, 2 sterile fil. forked, one of the di- 

 visions glandular, obtuse, the other acute, or rarely with half an an- 

 ther ; caps, ovate or oblong, about equaling the calyx. <> with oppo- 

 site lvs.j and axillary, \-flowered ped., resembling Gratiola in habit. 



I. GRATioLolDEs. Benth. (Lindernia dilatata. Ell. L. attenuata. MuJd. 



L. pyxidaria. Ph. Gratiola anagalloidea. Michx.} Glabrous, ascending, 

 much branched; Ivs. ovate or oblong, obtusish, subdentate, lower attenuated to 

 a petiole ; cor. erect, twice longer than the calyx, on bractless peduncles ; sterile 

 fit. bearing the glabrous, acute lobe below the middle. In wet places, Can., N. 

 Y. ! Ohio. ! la., 111. ! to Tex., frequent. A lofr, inconspicuous plant, 3 6 or 

 8' high. Leaves 5 8" long, sometimes mostly sessile, commonly the lower 

 distinctly petiolate. Corolla bluish-white, much exserted, 5" long. July, Aug. 

 Varies with the leaves somewhat dilated at base and sessile, and the pedun- 

 cles longer or shorter, being sometimes a little longer than the leaves. 



15. HEMIANTHUS. Nutt. 

 Gr. fyii, half, avSoj, flower; alluding to the absence Of the upper lip. 



Calyx 4-toothed ; cor. upper lip very short or obsolete, lower 3- 

 cleft, the middle segment long, spreading; cells of the 2 anthers 

 divaricate ; sterile fil. ; caps. 1 -celled, 2-valved. Minute gla- 

 brous, creeping. Lvs. opposite. 



