Hemianthus. XCI. SCROPHULARIACEiE. 403 



13. GRATIOLA. 



Lat. gratia, lavov j alluding to its medicinal virtues. 



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

 lower trifid, the palate uot prominent ; sta. 2, fertile, mostly with 3 

 sterile fllameuts ; caps. 2-celled, 4-valved, valves inflexed at margin. 

 — Herbs ivil/i opposilc Ivs. Ped. axillaiy, l-Jioicered, usuaUy bibracleo- 

 lale near ike calyx. 



1. G. AUREA. Mnhl. Golden Hedge llijsso]^. 



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

 nute. — A small, perennial herb, (5 — 8' high, frequenting the bordens 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 .~o, often with a lew 

 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.) — Si. ascending, branched; Ivs. lanceolate, subacute ; ped. as long or 



longer than the leaves; slerilefil. none. •% 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 amplcxicaul. Corolla white or pale-yellow, pubescent 

 within, twice as long as the caly.x, and on long, pubescent stalks. Caly.x with 

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

 than the sepals. July. 



3. G. sph;erocarpa. Ell. (G. Caroliniensis. Le Conie.) Round-fruilcd 

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



attenuate "to the base, sparingly toothed ; pcd. scarcely longer than the caly.x. — 

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

 the last chiefly in the short peduncles, i-ound capsules, broader leaves, &c. 

 Flowers whitish, 5 — G" long. June. 



14. ILYSANTHUS. Rafinesque. 



Gr. iXuf, mud, av^os, 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 ah an- 

 ther ; caps, ovate or oblong, about equaling the calyx. — (D ivilh oppo- 

 site Ivs., and axil/ar?/, l-Jloicered 2)cd.., rescmblbig Graliola in ha-blt. 



I. GRATiOLoiDEs. Ecnth. (Lindernia dilatata. Ell. L. attenuata. 3fiihl. 



L. pyxidaria. PA. Gratiola anagalloidea. Mich.v.) — Glabrous, a.scending 

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

 a petiole; cnr. 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 — (i or 

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

 distinctly pctiolate. 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. 



Or. hl^i, half, av^oi, 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 0; caps. 1 -celled, '2-valved. — ® Minute gla- 

 brous, creeping. Lvs. opposite. 



