HEMIANTHUS. XCI. SCROPHULARIACE^E. 403 



13. GRATlOLA. 



Lat. gratia, favor ; 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 inflexed at margin. 

 ---Herbs with opposite hs. Ped. axillary, \-flowered, usually bibracteo- 

 late near the calyx. 



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



Smooth; Ivs. oblong-lanceolate, subentire, half-clasping; sterile JiL 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. Beck. G. officinalis. 

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



longer than the leaves ; sterile Jit. none. ~1\. U. S. and Can. Stem 4 8' high, 

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

 long, and J 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 longei 

 than the sepals. July. 



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

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



attenuate \o 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. lAvj, 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 Ivs., ami axillary, \-flowered ped., resembling G-ratiola in habit. 



I. GRATioLolDEs. Benth. (Lindemia dilatata. Ell. L. attenuata. MiM. 



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 

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

 Y. ! Ohio. ! la., 111. ! to Tex., frequent. A low, 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. 



' t 15. HE MI ANT HUS. Nutt. 



Gr. ftpi, half, avSos, 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. (D Minute gla- 

 rous. creeping. Lvs. opposite. 



