335 
flowers, oblong or tubular terete not gibbous or declined calyx about 
equally 5-toothed, short 2-lipped corolla with straight tube usually 
shorter than calyx, and 4 antheriferous arcuate included stamens. 
1. M. Brownei Benth. Glabrous or nearly so: leaves roundish, obscurely crenate: 
pedicels bractless: calyx villous in the throat; teeth lanceolate-ovate.—A species of 
Florida and the West Indies, but represented in southeastern Texas (San Antonio to 
Brazos Santiago and southward) by var. PILOSIUSCULA Gray, with leaves and some- 
times stem and calyx sparsely pilose-pubescent. 
10. CALAMINTHA Tourn., Mench. (CALAMINT.) 
Perennials, with mostly purplish or whitish flowers, tubular 13-nerved 
2-lipped calyx mostly hairy in the throat, distinctly 2-lipped corolla 
with straight tube and inflated throat (upper lip erect, flattish, entire 
or notched; lower spreading, 3-parted), and 4 mostly ascending sta- 
mens with anthers usually approximate in pairs. 
1. C. Nuttallii Gray. Glabrous or nearly so, erect or ascending, copiously stolon- 
iferous at base: leaves entire, thickish and veinless; cauline linear or the lower 
spatulate, sessile, 10 to 18 mm. long; those of the creeping stolons ovate and orbicu- 
lar, short-petioled, 4 to 6 mm. long: flowers 1 to 3in the axils.—On wet limestone 
river banks, extending into Texas from the north central States. 
11. POLIOMINTHA Gray. 
Low suffrutescent plants canescent throughout or nearly so, with 
entire leaves, rose-color or purple flowers (except in no. 3) in axillary 
cymes or glomerules, terete and regular equally 5-toothed calyx bearded 
in the throat, 2-lipped corolla mostly with a hairy ring within the throat 
or tube (upper lip erect, emarginate; lower 3-cleft and spreading, the 
broader middle lobe emarginate), and 2 antheriferous stamens ascend- 
ing parallel under the upper lip (the posterior filaments mere subulate 
rudiments). 
1. P.incana Gray. Silvery with very close and minute tomentum: leaves linear 
or the lower oblong, sessile, veinless and the midrib obscure: calyx 15-nerved, white- 
villous, with conspicuous subulate teeth half the length of the corolla whose tube 
is pilose-annulate at summit. (Hedeoma incana Torr. Mex. Bound.)—Western Texas, 
2. P. mollis Gray. More tomentose, herbaceous nearly to the base: leaves ovate or 
oval, narrowed into a short petiole, 3 to 5-plinerved: calyx 13-nerved, with une- 
qually spreading minute teeth hardly atenth the length of the corolla whose tube is not 
annulate but sparsely pilose within. (Hedeoma mollis Torr. 1. c.)—Southwestern 
Texas, in the cafions and mountains west of the Pecos. 
3. P. glabrescens Gray. Frutescent, canescently puberulent, at length somewhat 
glabrate, very leafy: leaves linear-oblong, obtuse, veinless and glabrate above, con- 
spicuously punctate: calyx-teeth short, erect: corolla white with purple dots on 
lower lip and tube pilose-annulate within and equaled by the calyx.—At Maxon 
Spring, western Texas, near the Rio Grande (Havard). 
12. HEDEOMA Pers. (MOCK PENNYROYAL.) 
Mostly odorous annuals or perennials, with small leaves, loose axil- 
lary clusters of flowers often forming terminal leafy racemes, ovoid or 
tubular 13-neryed 2-lipped calyx gibbous on lower side near the base 
