426 XCIII. LABIATE. LAMIUM. 



2. D. PARVIFLORUM. Nutt. Small-flowered DragonJiead. 



Subpubescent ; Ivs. ovate-lanceolate, deeply serrate, petiolate ; bracts leafy, 

 ovate, ciliate, mucronate-serrate ; cal. upper segment much the largest ; fls. 

 small, verticillate, subcapitate, corolla scarcely exceeding the calyx. (g) Woods, 

 Watertown, N., Y. Vasey. Mo., Nuttall. Saskatchewan River, Richardson. 

 Very rare. Flowers whitish, very small, the verticils involucrate and almost 

 spicate. Calyx dry and membranaceous. Upper lip of the corolla arched, 

 emarginate, central lobe of lower lip crenate. July. 



TRIBE 8. STACHYDEJB. Calyx oblique or rarely subbilabiate, 3 10- 

 toothed. Corolla bilabiate, upper lip galeate or flat, lower lip unequally 3- 

 lobed. Stamens ascending, upper pair shorter. 



26. PHYSOSTEGIA. Benth. 

 Gr. tyvaa, a bladder, and orijyjj, a covering; from the inflated corollas. 



Calyx campanulate, subequally 5-toothed ; corolla tube mucli ex- 

 serted, throat inflated, upper lip concave, middle division of lower 

 lip largest, roundish, emarginate ; sta. 4, unconnected, ascending be- 

 neath the upper lip, the two lower rather longer. Flowers opposite, in 

 a terminal, bracteate, k-rowed spike. 



P. VIRGINIANA. Benth. (Dracocephalum Virg., denticulatum, variega- 

 tum and obovatum of auth. fide Benth.) Lion's Heart. Calyx teeth acute, 

 subequal. 1\. A beautiful plant, native in Penn., S. and W. States ! often adorn- 

 ing our gardens, where it spreads rapidly. It is 2 3f high, very smooth, dark 

 green. Stem square, thick, rigid. Leaves opposite, closely sessile, 4 5' by f ', 

 with remote and shallow teeth, of a shining dark green. Flowers in 4-rowed 

 spikes, numerous, dense, or often subremote. Bracts subulate. Corolla pale 

 purple, about an inch long, spotted inside. Aug. Sept. 



27. SYNANDRA. Nutt. 



Gr. <rvv, together, avfysg ', in allusion to the coherence of the anthers. 



Calyx 4-cleft, segments unequal, subulate, converging to one side ; 

 upper lip of cor. entire, vaulted, the lower obtusely and unequally 

 3-lobed ; throat inflated ; upper pair of anthers cohering, having the 

 contiguous cells empty. 



S. GRANDIFLORA. Nutt. Large-flowering Synandra. 



St. subsimple, nearly smooth, subterete ; Ivs. cordate-ovate, acuminate, ob- 

 tusely dentate, often dilated at base, upper ones smaller, cauline sessile, lower 

 subpetiolate ; fls. solitary and sessile; cal. seg. ovate, setaceously acuminate, 

 two upper larger than the two lower; cor. tube somewhat funnel-form, mouth 

 much inflated, upper lip entire, vaulted, lower 3-lobed, lobes entire. Banks of 

 the Ohio, Cincinnati, Nutt. Woods, near Vermillion River, 111. ! Stem about 

 If high. Corolla about I/ long, yellowish-white, lower lip elegantly striated 

 with purple lines. June. 



(3. 1 petiolata. Wood. St. quadrangular, hirsute ; Ivs. hirsute, deltoid, trun- 

 cate-cordate, all long-petiolate, lower petioles 4 6' long, upper 1 4'. Calyx 

 hirsute, almost hispid. Cincinnati, Clark ! This is, perhaps, a distinct species. 



28. LAMIUM. 



Lat. lamia, the name of a sea monster, to which the grotesque flowers may be likened. 



Upper lip of the corolla vaulted, galeate, nearly entire, lower lip 

 broad, emarginate, lateral lobes truncate, often toothed on each side 

 near the margin of the dilated throat. 



L. AMPLEXICAULE. HcnbU. 



Lvs. roundish, incisely crenate, floral ones broadly cordate, obtuse, sessile, 

 amplexicaul, lower ones petiolate. A small, slender herb, found in culti- 

 vated grounds. Stems ascending, several from the same root, 610' high, with 



