130 UNITED STATES AND MEXICAN BOUNDARY. 
long as the calyx. Upper lip alittle notched. Lower lip 3-lobed ; the middle lobe emarginate; 
lateral ones entire. Stamens 4; the two inferior ones perfect and nearly exserted ; anthers with | 
divaricate oblong cells; upper stamens reduced to simple short filaments. 
НЕрЕОМА PLICATA (n. sp.): suffruticosa e basi ramosa; ramis erectis pubescentibus ; foliis 
rhombeo-ovatis utrinque acutis argute serratis crebre et eximie penninerviis subplicatis, supra 
scabriusculis subtus pubescentibus ; corollis calyce gibboso duplo longioribus. Dry ravines near 
„ the Limpio mountains, July ; Bigelow. (No. 464 and 1718, Wright.) Branches about a span 
high, retrorsely pubescent. Leaves mostly shorter than the internodes, 8—4 lines long, of 
rather a thick texture, tapering to a petiole about a line in length, the numerous straight and 
parallel veins very prominent underneath. Verticils 2—6-flowered, the pedicels 1-2 lines long, 
Calyx gibbous at the base, distinctly 2-lipped ; teeth of the upper lip ovate, mucronate, half the 
length of the subulate ones of the lower lip. Tube of the corolla exserted, more than half the Tw 
length of the calyx ; upper lip 3-lobed, the middle lobe longer and emarginate ; the upper lip 
also emarginate. 
HEDEOMA DENTATA (n. sp.): annua; ramis erectis gracilibus pubescentibus; foliis petiolatis 
oblongo-lanceolatis acutis pauci-dentatis; venis prominulis; verticillis remotis 6—10-floris ; 
calyce subbilabiato vix gibboso, dentibus e basi lato-subulatis inequalibus, labii superiore diver- 
gentibus. Near Santa Cruz, Sonora, September; Thurber. Near the Copper Mines, October ; 
Bigelow. About a foot high; much branching from the base, forming a bunch about a foot in | 
diameter; the internodes of the branches rather distant. Leaves 5 lines long, tapering at the 
base into a short petiole, acutely 3—4-toothed on each margin; the veins underneath con- 
spicuous, thicker at the extremity. Verticils usually not more than 6-flowered. Calyx slightly 
gibbous toward the base; teeth of the lower lip nearly twice as long as those of the upper. 
Corolla twice as long as the calyx. Upper lip emarginate; lower 3-lobed, the middle lobe 
notehed. Near H. Drummondi, but in that species the leaves are entire with inconspicuous 
nerves, and the teeth of the calyx are all connivent. 
Var. nana: foliis minoribus late ovatis vel ovato-oblongis interdum subintegerrimis. Rocky 
hills of the Rio Grande, near El Paso, April—May. Plant usually from 3 to 6 inches high, 
much branched from the base, incano-pubescent. Leaves one-third of an inch long. Bracts 
subulate, shorter than the pedicels. Verticils approximated, 3-12-flowered. Calyx evidently 
bilabiate, gibbous ; upper teeth much апорт than the lower, subulate-lanceolate from а broad 
base; lower teeth subulate. / 
йома INCANA (n. sp.): л ramosissima, incana ; ramis erectis foliosis ; foliis lineari- 
bus vel oblongo-linearibus integerrimis obtusiusculis, axillis fasciculatis ; verticillastris 4-6- 
floris, floribus subsessilibus ; calycibus oblongo-cylindricis villosissimis subaequaliter 5-dentatis. 
се Sandy places near El Paso, April—May ; Parry, Wright & Bigelow. (Хо. 1523, Wright.) 
Plant about 2 feet high with the taste and odor of sage; the branches slender, sometimes 
apparently assurgent, slender, hoary, like the leaves, with a minute close pubescence. Leaves 
about three-fourths of an inch long, sessile, tapering at the base, flat. Flowers about 5 lines 
in length. Calyx densely villous with long white hairs; ; the teeth lanceolate. Corolla more 
than twice the length of the calyx ; upper lip notched ; lower 3-lobed, the middle lobe deeply 
emarginate ; tube short, villous in the throat. Fertile stamens 2, a little exserted ; the connec- 
tive very thick ; the anther-cells widely divaricate below, opening upward. Abortive rudiments 
of the superior stamens minute, Style strongly and rather unequally 2-cleft at the summit. 
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